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A motor unit consists of a single motor neuron with multiple muscle fibres.

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Important Questions on Neural control and Coordination

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Biology>Human Physiology>Neural control and Coordination>Neurons and Nerves
Regulatory proteins in a myofibril are
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Biology>Human Physiology>Neural control and Coordination>Neurons and Nerves
Lack of relaxation between successive stimuli in sustained muscle contraction is known as:
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Biology>Human Physiology>Neural control and Coordination>Neurons and Nerves
Stimulation of a muscle fiber by a motor neuron occurs at:
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Biology>Human Physiology>Neural control and Coordination>Neurons and Nerves
Distinguish between red muscle fires and white muscle fibres,
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Biology>Human Physiology>Neural control and Coordination>Neurons and Nerves
Assertion (A) : Skeletal muscle fibre is in syncytial state
Reason (R):  It is formed by fusion of cells
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Biology>Human Physiology>Neural control and Coordination>Neurons and Nerves
Which one of the following proteins does not play a role in skeletal muscle contraction?
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Biology>Human Physiology>Neural control and Coordination>Neurons and Nerves
Receptor sites for neurotransmitters are present on
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Biology>Human Physiology>Neural control and Coordination>Neurons and Nerves
Arrange the following in a sequence from edge to centre in a sarcomere.
A) M-line
B) Z-line
C) H-zone
D) I-band
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Biology>Human Physiology>Neural control and Coordination>Neurons and Nerves
Which of the following is not a character of red muscle?
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Biology>Human Physiology>Neural control and Coordination>Neurons and Nerves
Which of the following is an incorrect statement?
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Biology>Human Physiology>Neural control and Coordination>Neurons and Nerves
Study the following sentence:

I. The accumulation of pyruvic acid in the muscle causes fatigue.

II. ATP is resynthesized in the muscle by the phosphorylation of ADP by a phosphogen.

III. Cori and Cori's cycle occurs in the muscles.

IV. The phosphogen in the vertebrate muscle is arginine phosphate.

The correct set of answers for muscle contraction is
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Biology>Human Physiology>Neural control and Coordination>Neurons and Nerves
Statements:
A. A-bands of the muscle are dark and contain myosin.
B. I-bands are the light bands and contain actin.
C. During muscle contraction the A-band contracts.
D. The part between the two Z-lines is called as sarcomere.
E. The central part of thin filament, not overlapped by thick filament is called H-zone.
With respect to the above statements select the correct option.
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Biology>Human Physiology>Neural control and Coordination>Neurons and Nerves
Muscles undergo fatigue due to deposition of
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Biology>Human Physiology>Neural control and Coordination>Neurons and Nerves

Muscle pump is :-

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Biology>Human Physiology>Neural control and Coordination>Neurons and Nerves
H-zone of striated muscle fibre represents both thick and thin filaments.
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Biology>Human Physiology>Neural control and Coordination>Neurons and Nerves
The energy that is released by the hydrolysis of ATP by actin is used for:
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Biology>Human Physiology>Neural control and Coordination>Neurons and Nerves
In a muscle, the functional unit of contraction is the
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Biology>Human Physiology>Neural control and Coordination>Neurons and Nerves
Almost all muscles are derived from embryonic_____.
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Biology>Human Physiology>Neural control and Coordination>Neurons and Nerves
When body part moves towards the median axis the muscle is called :-
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Biology>Human Physiology>Neural control and Coordination>Neurons and Nerves
Draw the diagram of a sarcomere of skeletal muscle showing different regions.