Locomotion and Movement — NEET UG practice

62 questions

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Sample questions with solutions

Q1 · 2026

Match List I with List II related to muscular/skeletal system:

List I		List II
A.	Tetany	I.	Inflammation of joints
B.	Arthritis	II.	Autoimmune disorder affecting neuromuscular junction
C.	Myasthenia gravis	III.	Wild contraction in muscle due to low $Ca^{++}$ in body fluid
D.	Muscular dystrophy	IV.	Progressive degeneration of skeletal muscle

Choose the correct answer from the options given below:

A.
A-III, B-I, C-II, D-IV
B.
A-I, B-II, C-III, D-IV
C.
A-IV, B-III, C-II, D-I
D.
A-III, B-II, C-I, D-IV

Answer: A

Recall what each disorder means.

Tetany is a condition of rapid, wild muscle spasms caused by low $Ca^{++}$ levels in body fluids.

Arthritis refers to inflammation of the joints.

Myasthenia gravis is an autoimmune disorder that affects the neuromuscular junction, leading to weakness and fatigue of skeletal muscle.

Muscular dystrophy is a genetic disorder causing progressive degeneration of skeletal muscle.

Match each term to its definition.

So, A (Tetany) → III, B (Arthritis) → I, C (Myasthenia gravis) → II, D (Muscular dystrophy) → IV.

Hence, the answer is Option A (A-III, B-I, C-II, D-IV).

Q2 · 2026

Which of the following is the correct order of arrangement of vertebrate column from the head to toe?

A.
Cervical vertebra, thoracic vertebra, lumbar vertebra, sacrum
B.
Cervical vertebra, thoracic vertebra, sacrum, lumbar vertebra
C.
Sacrum, lumbar vertebra, thoracic vertebra, cervical vertebra
D.
Cervical vertebra, lumbar vertebra, thoracic vertebra, sacrum

Answer: A

Recall the overall structure of the vertebral column.

The vertebral column is made of 26 serially arranged vertebrae, placed dorsally, and divided into distinct regions from the skull downward.

List the regions in their natural top-to-bottom order.

Starting from the skull, the regions occur in this order: cervical (7) → thoracic (12) → lumbar (5) → sacral (1, fused) → coccygeal (1, fused).

Apply this order to the given options.

Since the question only lists four regions, the correct sequence from head to toe is cervical, thoracic, lumbar, sacrum.

Hence, the answer is Option A.

Q3 · 2026

Choose the correct statements regarding muscle contraction.

A. A motor neuron carries a signal sent by the Central Nervous System (CNS) to the sarcolemma of the muscle fibre.

B. The neural signal generates an action potential which causes the release of $Ca^{++}$ into sarcoplasm.

C. Increase in $Ca^{++}$ inactivates the actin for breaking cross bridges.

D. Actin binds to the myosin head to form a cross bridge.

E. Shortening of sarcomere takes place, by pulling actin filaments towards the centre of 'A' band.

Choose the correct answer from the options given below:

A.
C and D only
B.
A and B only
C.
C and E only
D.
A, B, D and E only

Answer: D

Check statement A.

The signal from the CNS does travel via a motor neuron to the sarcolemma of the muscle fibre, so A is correct.

Check statement B.

The neural signal generates an action potential in the sarcolemma, and this spreads through the muscle fibre, causing the release of $Ca^{++}$ into the sarcoplasm.

So,

\text{Action potential} \rightarrow \text{release of } Ca^{++} \text{ into sarcoplasm}

Hence, B is correct.

Check statement C.

Increased $Ca^{++}$ actually removes the masking of the active sites on actin (by binding to troponin), which helps form cross bridges rather than breaking them. So the statement that $Ca^{++}$ "inactivates actin for breaking cross bridges" is incorrect.

Check statement D.

Once the active sites are exposed, actin binds to the myosin head, forming a cross bridge — this is a correct description of the process, so D is correct.

Check statement E.

During contraction, the actin filaments are pulled towards the centre of the A band, causing the sarcomere to shorten. This is correct, so E is correct.

Combine the correct statements.

Only A, B, D and E are correct, while C is wrong.

Hence, the answer is Option D.

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