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Structure of Skeletal Muscle

The action po...

Question

The action potential that triggers a muscle contraction travels deep within the muscle cell by means of -

A

Sarcoplasmic reticulum

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B

Transverse tubules

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C

Synapse

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D

Motor end plates

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Solution

The correct option is B Transverse tubules
The actio potential that triggers muscle contracrtion travels deep within the muscle cell by meameans of transverse tubules.
So, the correct option is 'Transverse tubules'.

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Q. Select the correct option:
i) Muscle contraction takes place by sliding of thick filaments over thin filaments.
ii) When the neural signal reaches the neuromuscular junction, it releases acetylcholine, which helps generate an action potential in the muscle fibre.
iii) Muscle contraction begins by a signal sent by the peripheral nervous system by a motor neuron.

Q. If a muscle undergoes rapid contraction and relaxation, the sarcoplasmic reticulum extension

Q. Which of the following statements is/are correct?
i. Contraction of muscle is an active process.
ii. Relaxation of muscle is an active process.
iii. Calcium is stored in sarcoplasmic reticulum.

C a^{2 +}

for muscle contraction is both sarcoplasmic (endoplasmic) reticulum as well as extracellular fluid in case of

a. Skeletal muscles
b. Smooth muscles
c. Cardiac muscles

Q. Choose the correct option-

Abductor, Adductor, False rib, Joint, Supinator, Rigor mortis, Motor, End-plate, Spasm, Pronator, Muscle twitch

.......... a single contraction by a muscle.

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