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How acetylcholine is released during the generation of an action potential.

Important Questions on Control and Coordination

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Biology>Physiology P2>Control and Coordination>Muscle Contraction
Which of the following is incorrect w.r.t. example of multiunit smooth muscles?
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Biology>Physiology P2>Control and Coordination>Muscle Contraction

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A muscle gets fatigued by an accumulation of _____. (carboxylic acid/lactic acid)

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Biology>Physiology P2>Control and Coordination>Muscle Contraction
Sarcoplasm contains glycogen and red-coloured protein called _____.
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Biology>Physiology P2>Control and Coordination>Muscle Contraction
Which of the following is incorrect w.r.t. smooth muscles?
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Biology>Physiology P2>Control and Coordination>Muscle Contraction

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_____ muscle relaxes the elbow joint. (Extensors/Depressors)

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Biology>Physiology P2>Control and Coordination>Muscle Contraction

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Myoglobin is found in _____. (smooth muscle/skeletal muscle)

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Biology>Physiology P2>Control and Coordination>Muscle Contraction

Read the following statements:

(i) Smooth muscles may show striations.

(ii) Striated muscles are branched, syncytial and fusiform.

(iii) Smooth muscle fibers are uninucleated and taper at both ends.

(iv) Cardiac muscles have gap junction and intercalated discs.

Which of the above statements are correct?

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Biology>Physiology P2>Control and Coordination>Muscle Contraction
Protein contains in thick and thin filaments of myofibrils are _____ and actin respectively.
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Biology>Physiology P2>Control and Coordination>Muscle Contraction
Each 'I' band of the muscle fiber contains a dense line at the centre, known as the _____ line.
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Biology>Physiology P2>Control and Coordination>Muscle Contraction
The outermost connective tissue layer encircling the entire muscle is known as _____.
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Biology>Physiology P2>Control and Coordination>Muscle Contraction
The light bands of skeletal muscles are known as
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Biology>Physiology P2>Control and Coordination>Muscle Contraction

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_____ muscle contracts during flexion of the elbow joint. (Extensors/Flexors)

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Biology>Physiology P2>Control and Coordination>Muscle Contraction
The outermost connective tissue encircling the entire muscle is called _____. (Areolar tissue layer / epimysium / perimysium / endomysium)
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Biology>Physiology P2>Control and Coordination>Muscle Contraction
______fibres taper at both ends (fusiform) and do not show striations.
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Biology>Physiology P2>Control and Coordination>Muscle Contraction
Myofibrils are very fine fibres which consists of still finer fibres called _____.
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Biology>Physiology P2>Control and Coordination>Muscle Contraction

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Contraction of _____ muscle helps in lifting heavyweight. (triceps/biceps)

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Biology>Physiology P2>Control and Coordination>Muscle Contraction
T-tubules are formed as inward extension of _____. (Sarcolemma / sarcoplasmic reticulum / sarcomere / sarcoplasm).
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Biology>Physiology P2>Control and Coordination>Muscle Contraction
The shape of involuntary muscle fibres are _____ in shape.
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Biology>Physiology P2>Control and Coordination>Muscle Contraction
_____ is the plasma membrane of a muscle cell.
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Biology>Physiology P2>Control and Coordination>Muscle Contraction
Which of the following is a contractile protein of a muscle?