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NEET UG BIOLOGY MCQ: LOCOMOTION AND MOVEMENT
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Arrange the given steps of muscle contraction in the series of events from first to last
I. Myosin head binds to the exposed active site on action to form a cross bridge
II. The Z-line attached to these actin are also pulled in wards there by causing shortening of sarcomere also called contraction
III. This pulls the attached actin filaments towards the centre of A -band
The correct option is
I. Myosin head binds to the exposed active site on action to form a cross bridge
II. The Z-line attached to these actin are also pulled in wards there by causing shortening of sarcomere also called contraction
III. This pulls the attached actin filaments towards the centre of A -band
The correct option is
View answer and explanation
Correct option: C
I → III → II
Option C (I → III → II) is correct because it represents the correct sequence of events in muscle contraction, starting with myosin head binding and ending with sarcomere shortening.
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bind …A… in skeletal muscles and leads to the exposure of binding site for …B… on the filament …C…
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.