Every question from past board papers on Locomotion: movement types, muscle contraction, newest paper first. Open any question for its full worked answer.
Which of the following statements are correct regarding skeletal muscle?
A. Muscle bundles are held together by collagenous connective tissue layer called fascicle.
B. Sarcoplasmic reticulum of muscle fibre is a store house of calcium ions.
C. Striated appearance of skeletal muscle fibre is due to distribution pattern of actin and myosin proteins.
D. M line is considered as functional unit of contraction called sarcomere.
Choose the most appropriate answer from the options given below:
Which of the following statements wrongly represents the nature of smooth muscle ?
During muscular contraction which of the following events occur ?
(a) ‘H’ zone disappears
(b) ‘A’ band widens
(c) ‘I’ band reduces in width
(d) Myosine hydrolyzes ATP, releasing the ADP and Pi
(e) Z-lines attached to actins are pulled inwards
Choose the correct answer from the options given below.
Which of the following muscular disorders is inherited ?
Calcium is important in skeletal muscle contraction because it
Lack of relaxation between successive stimuli in sustained muscle contraction is known as :
It is much easier for a small animal to run uphill than for a large animal, because :
Name the ion responsible for unmasking of active sites for myosin for cross-bridge activity during muscle contraction.
