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A woman accidentally touched are hot pan...

A woman accidentally touched are hot pan without wearing a pair of mittens . On contact she immediately yanks her hand away.
Select the CORRECT statement with respect to to above phenomenon.

A

The single received from the sensory organ is carried into the PNS.

B

The efferent neuron receives the signal form sensory organ.

C

The impulse is transported via a dorsal nerve root to the spinal cord.

D

The impulse is transported via a dorsal nerve root to the spinal cord.

Text Solution

AI Generated Solution

The correct Answer is:
To solve the question regarding the woman's reflex action after touching a hot pan, we can break down the phenomenon step by step: ### Step-by-Step Solution: 1. **Understanding the Situation**: The woman accidentally touched a hot pan, which is a painful stimulus. This situation triggers a reflex action to protect her from harm. 2. **Reflex Action Definition**: A reflex action is an automatic response to a stimulus that occurs without conscious thought. It is a quick response to a potentially harmful situation. 3. **Pathway of Reflex Action**: - **Stimulus Detection**: The sensory receptors in the skin detect the heat (stimulus) from the hot pan. - **Afferent Neuron Activation**: The sensory information is transmitted via afferent neurons (sensory neurons) to the spinal cord. This occurs through the dorsal root of the spinal nerve. - **Integration in Spinal Cord**: The spinal cord processes the information and generates a response without involving the brain for immediate reaction. - **Efferent Neuron Activation**: The response is sent out through efferent neurons (motor neurons) from the spinal cord to the muscles in the arm. - **Muscle Contraction**: The muscles contract, causing her to yank her hand away from the hot pan. 4. **Conclusion**: The correct statement regarding this phenomenon is that the impulse (signal) is transported via the dorsal nerve root to the spinal cord, which is a key part of the reflex arc involved in this action. ### Correct Statement: The impulse is transported via the dorsal nerve root to the spinal cord.
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