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NEET UG BIOLOGY MCQ: LOCOMOTION AND MOVEMENT
1
Medium
1 of 1
Understanding
+4 | -1
During muscular contractions, which of the following events occur?
i) H - Zone disappears
ii) A band widens
iii) I - band reduces in width
iv) width of A band is unaffected
v) M line and Z line come closer
i) H - Zone disappears
ii) A band widens
iii) I - band reduces in width
iv) width of A band is unaffected
v) M line and Z line come closer
View answer and explanation
Correct option: A
i, iii, iv & v
Option A (i, iii, iv & v) is correct because it accurately describes the events that occur during muscular contractions.
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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.