MCQs on Muscle Contraction
1. The length of this is reduced while the muscle contracts
A. sarcomere
B. I-Band
C. A-Band
D. H-Zone
Answer:: C.
2. This about muscle fibres is true
A. for energy, they depend on anaerobic procedures
B. better adapted for slow sustained activities
C. myoglobin content is high
D. possess mitochondria in huge numbers
Answer:: A.
3. Muscle fatigue is due to the accumulation of
A. carbon dioxide
B. lactic acid
C. creatine phosphate
D. none of the above
Answer:: B.
4. White muscles are not used in this function
A. eyeball movement
B. sustained work at a slower pace for a prolonged period
C. fast flights of sparrows
D. strenuous and fast work for short duration of time
Answer:: B.
5. Duration of one muscle twitch is
A. 0.1 seconds
B. 1 second
C. 5 seconds
D. 10 seconds
Answer:: A.
6. A common connective tissue layer holding together the skeletal muscle bundles is
A. Aponeurosis
B. Fascia
C. Endomysium
D. Perimysium
Answer:: B.
7. This is a feature of white muscle fibers
A. less sarcoplasmic reticulum
B. large number of blood vessels
C. utilized for performing work for longer durations
D. none of these
Answer:: D.
8. Calcium, during muscle contraction binds with
A. Tropomyosin
B. TpC
C. TpI
D. TpT
Answer:: B.
9. This happens in a contracted skeletal muscle fiber
A. A band vanishes
B. M line vanishes
C. H zone elongates
D. I band is steady
Answer:: B.
10. Where does the stimulation of muscle fibers by a motor neuron take place
A. myofibril
B. transverse tubules
C. sarcoplasmic reticulum
D. neuromuscular junction
Answer:: D.
