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NEET UG BIOLOGY MCQ: LOCOMOTION AND MOVEMENT
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Read the following statements w.r.t. muscle contraction and choose the option that states all the correct statements.
a. Actin and myosin filaments do not get short but rather slide passes each other
b. The size of A-band reduces c. Length of H-zone decreases
a. Actin and myosin filaments do not get short but rather slide passes each other
b. The size of A-band reduces c. Length of H-zone decreases
View answer and explanation
Correct option: C
a and c
Option C (a and c) is correct because during muscle contraction, actin and myosin slide past each other, and the H-zone decreases in size. The A-band remains the same size.
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Identify A, B and C, so as to complete the given statements Which is not the function of endoskeleton? Read the following statements about human skeleton system and choose the option that correctly states them true (T) and false (F).
a. Total number of bones in hind limbs are 60
b. There are 26 bones in vertebral column of an adult man
c. There are 2 pairs of vertebrochondral ribs
d. Axial skeleton is comprised of 80 bones
Assertion : Muscle contraction force increases
with rise in strength of stimulus.
Reason : This is due to increased contraction of
individual muscle fibres with increase in stimulus
strength.
Identify A, B and C, so as to complete the given statements Which is not the function of endoskeleton? Read the following statements about human skeleton system and choose the option that correctly states them true (T) and false (F).
a. Total number of bones in hind limbs are 60
b. There are 26 bones in vertebral column of an adult man
c. There are 2 pairs of vertebrochondral ribs
d. Axial skeleton is comprised of 80 bones
Assertion : Muscle contraction force increases
with rise in strength of stimulus.
Reason : This is due to increased contraction of
individual muscle fibres with increase in stimulus
strength.