Question

Ritika accidentally touched a hot pan and immediately pulled her hand away. She felt the sensation of heat and reacted due to the action of -
A. Skin surface
B. Nerve cells
C. Blood cells
D. Nuclei of skin
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Answer 1

Skin surface.

Skin surface has heat receptors that releases signals for the nerve cells to complete the reflex action.

Answer 2

Answer:

a) Skin surface is the correct answer.

Explanation:

• The nerve pathway followed by a reflex action is called a reflex arc.
• A reflex arc defines the pathway by which a reflex travels-from the stimulus to sensory neuron to motor neuron to reflex muscle movement.
• A receptor in the skin detects a stimulus (the temperature change).
• The sensory neuron sends impulses to the relay neuron.
• The motor neuron sends impulses to an effector.
• Effector produces a response (muscle contracts to move the hand away)