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Asked Nov 12, 2019
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Define reflex and explain how reflexes differ from other motor actions.

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Expert Answer

Step 1

An involuntary action:

It is an action that takes place without the sensible choice of an organism. When this action occurs precisely in response to some stimulus, then it is known as a reflex. Involuntary actions are contradictory to the voluntary actions which usually takes place because of choice.

Step 2

A reflex:

It is also known as a reflex action. It is an involuntary action. It is almost an immediate movement of the body in response to some stimulus.

A reflex is occurred by the neural pathways that are known as reflex arcs. Before the impulse reaches the brain, these reflex arcs start to act on that impulse.

Reflex arcs are of two types:

  1. The autonomic reflex arc that affects the inner organs.
  2. The somatic reflex arc that affects the affecting muscles.

For example:

When light acts as a stimulus, the pupil of the eye changes in size. Sudden jerky withdrawal of hand or leg when pricked by a pin.

Step 3

Motor control:

It is the control of movement in organisms which involves a nervous system. Motor control comprises of reflexes along with the directed movement.

Motor actions happens due to the influence of motor control. Because the motor–cogniti...

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