Engineer & Medical

Locomotion and Movement question bank (Zoology)

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Q1.

Select the correct statements regarding mechanism of muscle contraction. A. It is initiated by a signal sent by CNS via sensory neuron. B. Neurotransmitter generates action potential in the sarcolemma. C. Increased $\mathrm{Ca}^{++}$level leads to the binding of calcium with troponin on action filaments. D. Masking of active site for actin is activated. E. Utilising the energy from ATP hydrolysis to form cross bridge. Choose the most appropriate answer from the options given below:

(A)

B, C and E only

(B)

C, D and E only

(C)

A and D only

(D)

B, D and E only

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Q2.

Given below are two statements: one is labelled as Assertion and the other is labelled as Reason.

Assertion: Osteoporosis is characterised by decreased bone mass and increased chances of fractures.

Reason: Common cause of osteoporosis is increased levels of estrogen.

In the light of the above statements, choose the most appropriate answer from the options given below:

(A)

Both Assertion and Reason are correct but Reason is not the correct explanation of Assertion.

(B)

Assertion is correct but Reason is not correct

(C)

Assertion is not correct but Reason is correct

(D)

Both Assertion and Reason are correct and Reason is the correct explanation of Assertion.

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