Muscle contraction in the body is triggered when a signal is sent by the central nervous system through the motor neuron. The neuromuscular junction is found between the sarcolemma and a motor neuron. Whenever a neural signal arrives at the junction, acetylcholine is secreted causing an action potential in the sarcolemma to be generated. Take this short quiz of 10 questions 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)
BYJU’S also offers MCQs on other important topics for NEET. Explore them.
Recommended Video:
NEET Biology 2023 Important Questions and Answers – Smart Mock Test | NEET 2023 Zoology Exam
Consider more:
| MCQs On Skeletal Tissue |
| MCQs On Vascular Tissue |
Comments