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NEET UG BIOLOGY MCQ: LOCOMOTION AND MOVEMENT
1
Medium
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Understanding
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During skeletal muscle contraction following events occur-
I. I-band shortens II. A-band shortens
III. H-zone shortens IV. Sarcomere contract
V. ATP changes to ADP and Pi
Choose the option with incorrect events
I. I-band shortens II. A-band shortens
III. H-zone shortens IV. Sarcomere contract
V. ATP changes to ADP and Pi
Choose the option with incorrect events
View answer and explanation
Correct option: D
Only II
Option D (Only II) is correct because during skeletal muscle contraction, the A-band does not shorten; it remains the same length.
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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.