Free Support and Movement MCQs with Answers

738 Support and Movement MCQs from Biology, each with the correct answer and a written explanation of why it is correct. Free and unlimited, with no account needed.

Support and movement covers the axial and appendicular skeleton, bone structure, joints and the arrangement of skeletal muscles. Muscle contraction is explained through actin, myosin, sliding filaments, calcium ions and ATP, while arthritis is distinguished as a disorder of joints rather than a normal part of movement.

Last updated 9 September 2026

Human Skeleton Muscles Muscle Contraction Joints Arthritis

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738 questions · page 27 of 37

521. The function of cardiac muscles is to:

A. To pump blood
B. To move the skeleton
C. To control the movement of substances through hollow organs
D. To pump the lymph

Explanation: The cardiac muscle is responsible for the contractility of the heart and, therefore, the pumping action.

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522. The function of skeletal muscles is to:

A. To pump blood
B. To move the skeleton
C. To control the movement of substances through hollow organs
D. To pump the lymph

Explanation: The main functions of skeletal muscle are to contract to produce movement, sustain body posture and position, maintain body temperature…

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523. The smallest contractile unit of muscle contraction called the sarcomere is the area between two:

A. H-zone
B. M-Line
C. Z-Line
D. A-band

Explanation: The sarcomere is the fundamental unit of contraction and is defined as the region between two Z-lines.

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524. The thousands of T-tubules of each muscle cell are collectively called:

A. Triad
B. Sarco-tubules
C. T-system
D. Neuromuscular junction

Explanation: The thousands of T-tubules of each muscle cell are collectively called T-system.

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525. The protein filament which binds to the calcium:

A. Actin
B. Myosin
C. Troponin
D. Tropomyosin

Explanation: The protein filament which binds to the calcium troponin. Troponin plays a central role in the calcium regulation of muscle contraction…

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526. Muscle fatigue is caused by:

A. CO2
B. Accumulation lactic acid
C. Fumaric acid
D. Ethyl alcohol

Explanation: Muscle fatigue is caused by the accumulation of lactic acid. Lactic acid is formed and accumulated in the muscle under conditions of high…

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527. Twisting around the actin chains there are two strands of another protein:

A. Myosin
B. Tropomyosin
C. Troponin
D. Creatine

Explanation: The actin molecules are arranged in two chains that twist around each other like a twisted double strand of pearls.Twisting around the…

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528. It remains fixed during muscle contraction:

A. Origin
B. Insertion
C. Belly
D. Bone

Explanation: The insertion and origin muscles are two different places where the bone is attached one at each end.

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529. _can polarize visible light:

A. M-line of sarcomere
B. I-band of sarcomere
C. H-band of sarcomere
D. A-band of sarcomere

Explanation: A -band of sarcomere can polarize visible light. The A-band of a sarcomere consists of an overlap between light and heavy (actin and…

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530. It length of myofibril from one Z-line to the next:

A. Plasma membrane
B. Sarcomere
C. Sarcoplasm
D. Sarcolemma

Explanation: The length of myofibril from one Z-line to the next is known as sarcomere A sarcomere is defined as the distance between the Z-lines.

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531. Muscle cell is considered as:

A. Muscle fiber
B. Sarcomere
C. Muscle bundle
D. Myofibril

Explanation: Each muscle consists of muscle bundles, which are further composed of muscle fibers of cells.

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532. Smooth endoplasmic reticulum is similar in structure to:

A. RER
B. Golgi bodies
C. Microfilaments
D. Sarcoplasmic reticulum

Explanation: The nerve impulse is carried through the T-tubule to the adjacent sarcoplasmic reticulum (SR).

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533. Pickup the ranges of muscle fibre:

A. 5-10 µm
B. 1-2 µm
C. 10-100 µm
D. 50-100 mn

Explanation: The diameter of skeletal muscle fibres is in ranges of 10 - 100 µm.

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534. The thin filaments extend across the I-band and partly into:

A. Z-line
B. H-zone
C. A-band
D. M-line

Explanation: The thin filaments extends across the I-band and partly in A-band.

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535. The _ have mid-section called H-zone:

A. H-zone
B. M-zone
C. Z-line
D. A-band

Explanation: Each A-band has a lighter stripe in its mid-section called H-zone (H stands for "hele" mean bright).The H-zone is bisected by dark line…

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536. Pick up a complex of three polypepfide chains protein:

A. Tropomyosin
B. Actin
C. Myosin
D. Troponin

Explanation: The protein that is complex of three polypeptide chains is called troponin.

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537. Each myosin filament is surrounded by_actin filaments on both ends:

A. 5
B. 6
C. 10
D. 12

Explanation: Each myosin filament is surrounded by 12 actin filaments on both end.

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538. After death, the amount_in the body falls:

A. Water
B. Calcium
C. Oxygen
D. ATP

Explanation: After death, the amount of ATP in the body falls. Under these circumstances the bridges cannot be broken and so they remain firmly…

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539. Majority of muscles tissue in human body are_type:

A. Smooth
B. Circular
C. Cardiac
D. Skeletal

Explanation: Majority of muscles tissue in your body are skeletal type.

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540. Haversian canals occur in the:

A. Humerus
B. Pubis
C. Scapula
D. Clavicle

Explanation: Small bones are solid. Long bones, such as the humerus and femur, have a cavity, the marrow cavity, at the centre.

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