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CBSE Class 11 Biology Chapter 17 Locomotion and Movement Worksheet with Answers

Chapter 17 Locomotion and Movement is a crucial component of the CBSE Class 11 Biology syllabus that explores how organisms move and the anatomical structures enabling this movement. This printable worksheet has been carefully designed to cover all major concepts from the NCERT textbook, including ciliary, flagellar, muscular, and amoeboid movements, the human skeletal system with its 206 bones, joints, and the sliding filament theory of muscle contraction. Students should allocate approximately 90 minutes to complete this worksheet without interruption.

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Key takeaways

✓Complete worksheet covering types of movement, skeletal system, and muscle contraction as per NCERT Class 11 Biology Chapter 17
✓Difficulty level: Moderate to Advanced; suggested completion time is 90 minutes for comprehensive practice
✓Includes 6 MCQs, 6 fill-in-the-blanks, 5 matching pairs, 5 short-answer questions, and 3 HOTS long-answer questions
✓Detailed answer key with explanations provided for every question to enable self-assessment and concept reinforcement
✓Case-study question tests application of locomotion and movement concepts in real-world biological contexts
✓Aligned with latest CBSE Class 11 Biology examination pattern and NCERT terminology for board exam readiness

Quick Chapter Recap: Locomotion and Movement

Before attempting the worksheet, let us revisit the core concepts from NCERT Class 11 Biology Chapter 17. Locomotion refers to voluntary movement resulting in change of place or location, while movement is a broader term that includes both voluntary and involuntary motion at cellular, tissue, or organ level. The chapter systematically covers four main types of movement in organisms: amoeboid movement seen in leucocytes and macrophages using pseudopodia, ciliary movement powered by cilia on epithelial surfaces, flagellar movement using whip-like flagella in spermatozoa, and muscular movement which is the predominant form in higher vertebrates. The human skeletal system consists of 206 bones divided into axial skeleton (80 bones including skull, vertebral column, sternum, and ribs) and appendicular skeleton (126 bones including limb bones and girdles). Joints are classified as fibrous (immovable), cartilaginous (partially movable), and synovial (freely movable). Muscles are of three types: skeletal (voluntary, striated), smooth (involuntary, non-striated), and cardiac (involuntary, striated). The sliding filament theory explains muscle contraction through the interaction of actin and myosin filaments in the presence of calcium ions and ATP energy. Understanding these fundamentals is essential for scoring well in CBSE Class 11 Biology examinations.

Locomotion is voluntary movement with change in position; movement includes all motor activities
Four types: amoeboid, ciliary, flagellar, and muscular movement
Human skeleton: 206 bones (80 axial + 126 appendicular)
Three joint types: fibrous, cartilaginous, and synovial
Muscle contraction follows sliding filament theory with actin-myosin interaction

Section A: Multiple Choice Questions (MCQs)

This section contains six multiple-choice questions designed to test your conceptual understanding and recall of facts from NCERT Class 11 Biology Chapter 17 on Locomotion and Movement. Each question carries one mark and should be answered by selecting the single most appropriate option. These MCQs have been crafted to mirror the style and difficulty level typically encountered in CBSE board examinations and school assessments. Students should read each question carefully, eliminate obviously incorrect options, and then choose the best answer. Pay special attention to terms like sarcomere, H-zone, actin, myosin, and specific bone names as these are frequently tested concepts. Time allocation for this section should be approximately 10-12 minutes. Remember that understanding the underlying concept is more important than rote memorization, as questions may be framed in application-based formats. Review your NCERT textbook diagrams of sarcomere structure and skeletal system before attempting these questions for better retention and accuracy.

Question 1: Which of the following is an example of amoeboid movement? (a) Movement of food in alimentary canal (b) Movement of cilia in trachea (c) Movement of white blood cells (d) Movement of limbs
Question 2: The total number of bones in the human axial skeleton is: (a) 80 (b) 126 (c) 206 (d) 306
Question 3: Ball and socket joint is present between: (a) Humerus and pectoral girdle (b) Atlas and axis vertebrae (c) Carpal bones (d) Phalanges
Question 4: During muscle contraction, which of the following does NOT occur? (a) H-zone decreases (b) A-band remains constant (c) I-band increases (d) Sarcomere shortens
Question 5: The contractile protein of skeletal muscle involving ATPase activity is: (a) Tropomyosin (b) Troponin (c) Myosin (d) Actin
Question 6: Glenoid cavity articulates with: (a) Femur (b) Humerus (c) Clavicle (d) Tibia

Section B: Fill in the Blanks

Complete the following statements by filling in the appropriate technical terms from Chapter 17 Locomotion and Movement. This section assesses your grasp of specific terminology and definitions central to understanding the mechanisms of movement in organisms. Each blank represents a key concept that has been explicitly covered in your NCERT Class 11 Biology textbook. Students should write precise, scientifically accurate terms without adding extra words. Spelling accuracy is important as biological terminology must be exact. Time allocation for this section should be approximately 8-10 minutes. Before filling the blanks, read the entire statement to understand its context. These questions test recall as well as comprehension of relationships between different anatomical structures and physiological processes. Review the definitions of movement types, names of specific bones in the human skeleton, components of muscle structure including sarcomere, myofibrils, and the proteins involved in contraction. Understanding the role of calcium ions, ATP, and the neuromuscular junction will help you answer accurately. Practice writing these terms multiple times to ensure correct spelling during examinations.

Statement 1: The functional unit of contraction in a muscle fiber is called ___________.
Statement 2: ___________ is the term used for voluntary movement resulting in a change of place or location.
Statement 3: The protein that forms the thin filament in muscle fibers is ___________.
Statement 4: The socket in the pelvic girdle that articulates with the femur is called ___________.
Statement 5: Movement exhibited by human sperm cells is an example of ___________ movement.
Statement 6: The type of joint present between the skull bones of an adult is ___________ joint.

Section C: Match the Following

Match the items in Column A with the most appropriate corresponding items in Column B. This section evaluates your ability to establish correct relationships between structures and their functions, or between anatomical parts and their classifications. Write the correct letter corresponding to each number in your answer sheet. Each correct match carries one mark, and there are no negative marks for incorrect matches. Time allocation should be approximately 7-8 minutes for this section. Read all items in both columns completely before starting to match, as this prevents hasty incorrect associations. These matching questions are designed to test your understanding of the interconnectedness of concepts within Locomotion and Movement. Pay attention to the specific characteristics of different movement types, unique features of various skeletal components, and the distinct properties of muscle types. Review the classification of bones based on shape (long, short, flat, irregular, sesamoid), the types of muscles (skeletal, smooth, cardiac) and their locations, and the different categories of joints. Understanding the anatomical position and function of each structure will help you make accurate matches. This format is commonly used in CBSE Class 11 Biology assessments.

Column A: (1) Sliding filament theory, (2) Ball and socket joint, (3) Actin, (4) Red muscle fibers, (5) Pectoral girdle
Column B: (a) Thin filament, (b) Shoulder joint, (c) Muscle contraction mechanism, (d) Myoglobin-rich, (e) Clavicle and scapula

Section D: Short Answer Questions (2-3 marks each)

Answer the following questions in approximately 30-50 words each. These short-answer questions carry 2-3 marks depending on the depth of explanation required. Students should provide concise yet complete answers that directly address the question without unnecessary elaboration. Use scientific terminology from the NCERT Class 11 Biology textbook wherever applicable. Time allocation for this section should be approximately 25-30 minutes total, which means about 5-6 minutes per question. Structure your answers with clear points or brief sentences rather than long paragraphs. Where appropriate, mention specific examples, names of structures, or processes to demonstrate comprehensive understanding. These questions test both recall and understanding, requiring you to explain concepts in your own words while retaining scientific accuracy. Before writing, mentally outline the key points you need to cover. Questions may ask you to differentiate between related concepts, describe structures or processes, or explain the significance of certain anatomical features. Review the diagrams in your NCERT textbook showing sarcomere structure, types of joints, and skeletal divisions. Understanding the functional relationship between structure and movement is crucial for answering these questions effectively.

Question 1: Differentiate between skeletal muscle and smooth muscle on the basis of structure and location. (2 marks)
Question 2: Explain the role of calcium ions in muscle contraction. (2 marks)
Question 3: What is a synovial joint? Name two places in the human body where such joints are found. (3 marks)
Question 4: Describe the axial skeleton and mention the number of bones it contains. (2 marks)
Question 5: Define rigor mortis. Why does this condition occur? (3 marks)

Section E: Long Answer and HOTS Questions (5 marks each)

Provide detailed answers to the following questions in approximately 100-150 words each. These long-answer questions carry 5 marks and require comprehensive explanations demonstrating deep understanding of the chapter content from NCERT Class 11 Biology. Students should structure their answers logically, using appropriate subheadings or numbered points where necessary. Include relevant diagrams if the question demands, clearly labeling all parts. Time allocation for this section should be approximately 30-35 minutes total, roughly 10-12 minutes per question. These Higher Order Thinking Skills (HOTS) questions assess your ability to analyze, synthesize, and apply concepts rather than merely recall facts. You may need to integrate information from different parts of the chapter or explain cause-and-effect relationships. Use technical terminology accurately and explain processes step-by-step. Questions typically ask you to describe mechanisms (like the sliding filament theory), compare and contrast different structures or processes, or explain the physiological basis of certain phenomena. Before writing, create a brief mental outline of all points to cover. CBSE examiners award marks for conceptual clarity, logical presentation, scientific accuracy, and completeness of the answer. Review the detailed mechanism of muscle contraction, including the role of ATP, calcium ions, troponin, and tropomyosin.

Question 1: Describe the sliding filament theory of muscle contraction. Mention the role of ATP and calcium ions in this process. (5 marks)
Question 2: Explain the structure of a skeletal muscle fiber with a well-labeled diagram. What are the different components of a sarcomere? (5 marks)
Question 3: Classify joints on the basis of structural characteristics and give one example of each type. Which type allows maximum movement and why? (5 marks)

Section F: Case Study Question

Read the following case study carefully and answer the questions that follow. Case-based questions are increasingly important in CBSE Class 11 Biology examinations as they test your ability to apply theoretical knowledge to real-world or experimental scenarios. This format assesses higher-order thinking skills including analysis, interpretation, and application. Time allocation for this section should be approximately 12-15 minutes. Read the case study passage at least twice before attempting the questions. Underline or note key information such as specific symptoms, observations, or experimental conditions mentioned. The questions following the case study may be MCQs, short-answer, or assertion-reasoning types. Your answers should be based strictly on the information provided in the passage along with your understanding of Chapter 17 concepts from NCERT Class 11 Biology. This particular case study focuses on a practical scenario involving muscle physiology and movement disorders, requiring students to connect textbook knowledge with clinical observations. Understanding muscle fatigue, the role of ATP in contraction, and the effects of calcium ion concentration will help you answer accurately. Such questions prepare students for competitive examinations like NEET where application-based questions are common.

Complete Answer Key with Explanations

This comprehensive answer key provides correct answers along with brief explanations for every question in the worksheet. Students should attempt all questions independently before referring to this section. Use the answer key for self-assessment and to understand the reasoning behind each correct answer. Where your answer differs from the key, revisit the relevant section in your NCERT Class 11 Biology textbook to clarify the concept. For MCQs, explanations clarify why the correct option is right and why others are incorrect. For descriptive answers, compare the key points mentioned here with your response. If you consistently make errors in a particular topic area such as sliding filament theory or skeletal system anatomy, it indicates the need for focused revision. CBSETUTOR.ai offers personalized practice with instant doubt-solving through photo upload at just ₹999 per month for all subjects across Classes 6-12, with a 3-day free trial to experience AI-powered learning. The platform provides chapter-wise worksheets, video explanations, and 24×7 AI tutor support, making it an invaluable resource for CBSE students preparing for board examinations. Regular practice with such worksheets followed by careful review of answers is the most effective strategy for mastering Locomotion and Movement concepts.

Section A Answers: 1-(c), 2-(a), 3-(a), 4-(c), 5-(c), 6-(b)
Section A Explanations: 1. White blood cells use pseudopodia for amoeboid movement. 2. Axial skeleton has 80 bones (skull, vertebral column, sternum, ribs). 3. Ball and socket joint between humerus and glenoid cavity of scapula. 4. During contraction, I-band decreases, not increases. 5. Myosin has ATPase activity. 6. Glenoid cavity of scapula articulates with head of humerus.
Section B Answers: 1. Sarcomere, 2. Locomotion, 3. Actin, 4. Acetabulum, 5. Flagellar, 6. Fibrous/Sutural
Section C Answers: 1-(c), 2-(b), 3-(a), 4-(d), 5-(e)
Section D Answer 1: Skeletal muscles are striated, voluntary, and multinucleated, found attached to bones. Smooth muscles are non-striated, involuntary, and uninucleate, found in internal organs like alimentary canal and blood vessels.
Section D Answer 2: Calcium ions bind to troponin on actin filaments, causing tropomyosin to shift and expose myosin-binding sites. This allows cross-bridge formation between actin and myosin, essential for muscle contraction. Without calcium, these binding sites remain masked.
Section D Answer 3: Synovial joints are freely movable joints characterized by a synovial cavity filled with synovial fluid between articulating bones. The joint is enclosed in a capsule. Examples include shoulder joint (ball and socket) and knee joint (hinge type). Maximum movement occurs here.
Section D Answer 4: The axial skeleton forms the main axis of the body and includes 80 bones: skull (22 bones), vertebral column (26 bones), sternum (1 bone), and ribs (24 bones). It provides protection to vital organs.
Section D Answer 5: Rigor mortis is the stiffening of muscles after death. It occurs because after death, ATP production stops but myosin heads remain attached to actin, forming permanent cross-bridges that cannot be broken without ATP, causing rigidity.
Section E Answer 1: Sliding filament theory states that muscle contraction occurs by sliding of actin (thin) filaments over myosin (thick) filaments, shortening the sarcomere. When a motor neuron stimulates muscle, calcium ions are released from sarcoplasmic reticulum. Calcium binds to troponin, causing tropomyosin to move away from myosin-binding sites on actin. Myosin heads bind to actin using ATP energy, forming cross-bridges. The myosin head tilts (power stroke), pulling actin filaments toward the center of sarcomere. ATP binds to myosin, releasing it from actin. Myosin head hydrolyzes ATP and returns to original position. This cycle repeats, causing contraction. Relaxation occurs when calcium is pumped back and tropomyosin again blocks binding sites.
Section E Answer 2: A skeletal muscle fiber is a long, cylindrical, multinucleated cell surrounded by plasma membrane called sarcolemma. Inside, the cytoplasm (sarcoplasm) contains many parallel myofibrils. Each myofibril shows alternate light I-bands (isotropic, containing only actin) and dark A-bands (anisotropic, containing myosin with overlapping actin). The sarcomere is the functional unit between two successive Z-lines. It contains the I-band on sides, A-band in center, H-zone in middle of A-band (only myosin), and M-line in center of H-zone. Thin filaments (actin with troponin and tropomyosin) and thick filaments (myosin with head and tail) are the contractile proteins.
Section E Answer 3: Joints are classified as: (1) Fibrous joints - bones joined by fibrous tissue, immovable, e.g., sutures in skull. (2) Cartilaginous joints - bones joined by cartilage, partially movable, e.g., joints between vertebrae. (3) Synovial joints - bones separated by synovial cavity with fluid, freely movable, e.g., shoulder, knee, elbow. Synovial joints allow maximum movement because of the presence of synovial fluid that reduces friction, and the cavity that permits extensive motion. These are further classified as ball-and-socket, hinge, pivot, gliding, saddle, and condyloid based on movement range.
Case Study Answers: (a) Ravi experienced cramps due to excessive loss of calcium and sodium ions through sweating. Low calcium levels impaired normal muscle contraction-relaxation cycle, causing involuntary sustained contractions (cramps). (b) Calcium ions bind to troponin, exposing myosin-binding sites on actin filaments, enabling cross-bridge formation and muscle contraction. (c) ORS restored electrolyte balance, especially calcium and sodium levels, allowing normal muscle function and relieving cramps.

How to Use This Worksheet Effectively

To maximize learning outcomes from this CBSE Class 11 Biology Chapter 17 worksheet, students should follow a systematic approach. First, ensure you have thoroughly read and understood the chapter from your NCERT textbook before attempting the worksheet. Keep your textbook, Class 11 Biology notes, and a timer nearby. Set aside an uninterrupted 90-minute block to simulate exam conditions. Begin with the quick recap to refresh concepts, then proceed section-by-section in sequence. Do not look at the answer key until you have attempted all questions. After completion, use the answer key to check your responses and award yourself marks honestly. Pay special attention to questions you got wrong or left unanswered. For these questions, revisit the relevant pages in your NCERT Class 11 Biology textbook and make separate notes. Identify patterns in your mistakes such as confusion between similar terms, incomplete understanding of mechanisms like muscle contraction, or difficulty in applying concepts. Teachers can use this worksheet as an in-class assessment tool or homework assignment. Parents monitoring their child's preparation for CBSE examinations can use completion time and accuracy as indicators of concept mastery. For personalized practice and immediate doubt resolution, students can access CBSETUTOR.ai, which offers AI-powered tutoring at ₹999 per month covering all subjects for Classes 6-12 with photo-upload solving and 24×7 availability, along with a 3-day free trial.

Complete the worksheet in one sitting under timed conditions for realistic practice
Attempt all questions independently before checking the answer key
Mark your answers honestly and calculate your percentage score
Review incorrect answers thoroughly and revisit NCERT textbook sections
Create error logs for topics requiring additional practice
Reattempt the worksheet after one week to measure improvement

Important Tips for Chapter 17 Examination Success

Locomotion and Movement is a high-scoring chapter in CBSE Class 11 Biology if students master the anatomical terminology and physiological mechanisms thoroughly. Focus on understanding rather than rote memorization. Draw and label diagrams regularly, especially sarcomere structure with Z-lines, A-bands, I-bands, H-zones, actin, and myosin filaments, as diagram-based questions carry significant marks. Create comparison tables for different types of movements, muscles, and joints to remember distinguishing features clearly. Practice writing the sliding filament theory mechanism step-by-step until you can explain it fluently without referring to notes. Memorize the exact numbers: 206 total bones, 80 axial, 126 appendicular. Learn the names and locations of major bones and joints, as CBSE often asks specific identification questions. Understand the role of calcium ions, ATP, troponin, and tropomyosin in muscle contraction at the molecular level. For long-answer questions, structure your response with clear subheadings and numbered points. Use scientific terminology precisely rather than colloquial language. Review previous years' CBSE Class 11 Biology question papers to identify frequently asked questions from this chapter. Topics like types of movements, joint classification, sliding filament theory, and disorders of muscular and skeletal systems are examination favorites. Regular practice with worksheets like this one builds confidence and speed, essential for completing the three-hour board examination comfortably.

Master the sliding filament theory with step-by-step ATP and calcium ion roles
Practice drawing and labeling sarcomere structure, skeletal system diagrams regularly
Create comparison tables for movement types, muscle types, and joint classifications
Memorize exact numbers: 206 bones (80 axial + 126 appendicular)
Review NCERT textbook boxes on disorders like myasthenia gravis, muscular dystrophy, arthritis
Solve previous years' CBSE question papers to identify important questions

Frequently asked questions

What is the difference between locomotion and movement as per NCERT Class 11 Biology Chapter 17?+

Locomotion is voluntary movement that results in a change of place or location of the entire organism, like walking or swimming. Movement is a broader term that includes all motor activities, both voluntary and involuntary, at cellular, tissue, or organ level, such as heartbeat or ciliary action in the trachea, which may not involve positional change of the whole organism.

How many bones are there in the human axial and appendicular skeleton according to CBSE Class 11 Biology syllabus?+

The human skeletal system contains 206 bones in total. The axial skeleton comprises 80 bones including the skull (22 bones), vertebral column (26 bones), sternum (1 bone), and ribs (12 pairs = 24 bones). The appendicular skeleton consists of 126 bones including bones of limbs and girdles (pectoral and pelvic). This classification is important for CBSE examinations.

What is the sliding filament theory of muscle contraction explained in NCERT Class 11 Biology?+

The sliding filament theory, proposed by H.E. Huxley and J. Hanson, explains that muscle contraction occurs when actin (thin) filaments slide over myosin (thick) filaments, shortening the sarcomere without changing the length of individual filaments. This process requires ATP energy and calcium ions, which bind to troponin, exposing myosin-binding sites on actin for cross-bridge formation and power stroke.

Which are the three types of muscles and their characteristics in Class 11 Biology Chapter 17?+

The three types are: (1) Skeletal muscle - voluntary, striated, multinucleated, attached to bones for locomotion; (2) Smooth muscle - involuntary, non-striated, spindle-shaped with single nucleus, found in internal organs like intestine and blood vessels; (3) Cardiac muscle - involuntary, striated, branched with single nucleus, found only in the heart with intercalated discs for synchronized contraction.

What are the different types of joints covered in CBSE Class 11 Biology and their examples?+

Joints are classified as: (1) Fibrous joints - immovable, bones joined by fibrous tissue, e.g., skull sutures; (2) Cartilaginous joints - partially movable, bones connected by cartilage, e.g., vertebral joints; (3) Synovial joints - freely movable with synovial cavity and fluid, e.g., ball-and-socket joint in shoulder, hinge joint in knee, pivot joint in atlas-axis. Synovial joints permit maximum movement.

What is the role of calcium ions in muscle contraction according to Class 11 Biology solutions?+

Calcium ions are essential for muscle contraction. When a nerve impulse reaches the muscle, calcium ions are released from the sarcoplasmic reticulum. These calcium ions bind to troponin protein on actin filaments, causing a conformational change that moves tropomyosin away from myosin-binding sites on actin. This exposure allows myosin heads to attach and form cross-bridges, initiating the contraction process.

What is rigor mortis and why does it occur as explained in NCERT Class 11 Biology?+

Rigor mortis is the stiffening of body muscles after death, typically beginning 3-4 hours post-mortem. It occurs because ATP production stops after death, but myosin heads remain attached to actin filaments. Without ATP, these cross-bridges cannot be broken, resulting in permanent contraction and body rigidity. The condition eventually disappears as muscle proteins degrade.

How should students prepare for diagram-based questions from Chapter 17 Locomotion and Movement?+

Students should practice drawing labeled diagrams regularly, particularly the structure of sarcomere showing Z-lines, A-band, I-band, H-zone, M-line, actin, and myosin filaments. Also practice skeletal system diagrams showing axial and appendicular divisions, and structure of different joint types. Use pencil for diagrams, draw neat lines, label clearly with arrow marks, and ensure proportions are accurate for scoring full marks in CBSE examinations.

What are the important Class 11 Biology notes points for quick revision of Locomotion and Movement?+

Key revision points include: four types of movement (amoeboid, ciliary, flagellar, muscular); 206 bones (80 axial + 126 appendicular); three muscle types and their features; three joint classifications with examples; sarcomere as the functional unit; sliding filament theory steps; roles of ATP, calcium, troponin, tropomyosin; and common disorders like arthritis, osteoporosis, muscular dystrophy, and myasthenia gravis mentioned in NCERT.

How can CBSETUTOR.ai help students master Chapter 17 Locomotion and Movement effectively?+

CBSETUTOR.ai provides 24×7 AI-powered tutoring for CBSE Class 11 Biology at just ₹999 per month for all subjects across Classes 6-12. Students can upload photos of difficult questions from Locomotion and Movement and get instant step-by-step solutions. The platform offers chapter-wise practice worksheets, video explanations of complex topics like sliding filament theory, and personalized doubt-clearing. A 3-day free trial lets students experience the benefits before subscribing.

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