NEET UG BIOLOGY MCQ: LOCOMOTION AND MOVEMENT

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Understanding +4 | -1

Select the wrong set of statements with respect to muscles
I. Z-line is present in the centre of the light band
II. Thin filaments are firmly attached to the M-line
III. The central part of the thick filaments, not overlapped by thin filaments is called Z-band
IV. Light band contains only thin filaments 

View answer and explanation

Correct option: B

II and III

Option B (II and III) is correct because thin filaments are attached to the Z-line, not the M-line, and the H-zone, not the Z-band, is the central part of the thick filaments not overlapped by thin filaments.

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What is the incorrect set of antagonistic muscles? Which one of the following is not a part of ear osicles?

C{a^2}^ +

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.