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Locomotion and Movement · Question 2

NEET (UG) 2026MCQMedium📈 Topic in 50% papers+4−1
1

Choose the correct statements regarding muscle contraction. Choose the correct answer from the options given below:

  1. A and B only
  2. C and E only
  3. C and D only
  4. A, B, D and E only

Answer

(4) A, B, D and E only

Solution

As per NCERT,

A – correct: a signal from the CNS reaches the sarcolemma through a motor neuron (neuromuscular junction).

B – correct: the action potential releases Ca++ into the sarcoplasm.

C – incorrect: increased Ca++ binds troponin and removes the masking of active sites on actin, so actin is activated and cross bridges form.

D – correct: the myosin head binds to the exposed active sites on actin to form a cross bridge.

E – correct: the cross bridges pull the actin filaments towards the centre of the 'A' band, shortening the sarcomere.

∴ Correct statements: A, B, D and E

Answer: (4)

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Keep practising — Locomotion and Movement

2

Which of the following statements are correct with reference to human endoskeleton? Choose the correct answer from the options given below:

  1. C, D and E only
  2. B, C and E only
  3. A, B and D only
  4. B and E only
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3

Which of the following represents the correct sequence of arrangement of bones in the lower limb of humans?

  1. Femur-tarsal-patella-tibia
  2. Femur-tibia-patella-tarsal
  3. Patella-femur-tibia-tarsal
  4. Femur-patella-tibia-tarsal
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4

The number of vertebrae in a human is .

  1. 206
  2. 7
  3. 12
  4. 26
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5

Sperm motility is due to .

  1. muscular movement
  2. flagellar movement
  3. ciliary movement
  4. amoeboid movement
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6

Muscle contraction is initiated by a signal sent by the central nervous system by the release of .

  1. cyclic adenosine monophosphate
  2. acetylcholine
  3. acetyl coenzyme A
  4. cyclic guanosine monophosphate
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7

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

  1. Cervical vertebra, thoracic vertebra, lumbar vertebra, sacrum
  2. Cervical vertebra, thoracic vertebra, sacrum, lumbar vertebra
  3. Sacrum, lumbar vertebra, thoracic vertebra, cervical vertebra
  4. Cervical vertebra, lumbar vertebra, thoracic vertebra, sacrum
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8

Which of the following are Autoimmune disorders? Choose the most appropriate answer from the options given below:

  1. A, B & D only
  2. A, B & E only
  3. B, C & E only
  4. C, D & E only
NEET (UG) 2024
9

Match List I with List II : Choose the correct answer from the options given below :

  1. A-IV, B-II, C-III, D-I
  2. A-I, B-III, C-II, D-IV
  3. A-II, B-III, C-I, D-IV
  4. A-III, B-I, C-IV, D-II
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10

Match List-I with List-II: Choose the correct answer from the options given below:

  1. A-II, B-III, C-IV, D-I
  2. A-III, B-II, C-I, D-IV
  3. A-I, B-IV, C-III, D-II
  4. A-II, B-I, C-III, D-IV
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11

Select the correct statements regarding mechanism of muscle contraction. Choose the most appropriate answer from the options given below:

  1. B, C and E only
  2. C, D and E only
  3. A and D only
  4. B, D and E only
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