9
QuizMultiple Choice

The Nervous and Endocrine Systems

Question 9 • 24 - 25 CR - Biology B (0411KB)

When a person touches a hot object with their hand, they quickly remove their hand without thinking about it. Which best describes the path that information takes in this scenario?

Answer
A
Information goes from the sensory neurons to the spinal cord and then directly to the motor neurons, bypassing the brain.
B
Information goes from the motor neurons to the brain and then directly to the sensory neurons, bypassing the spinal cord.
C
Information goes from the spinal cord to the brain and then directly to the motor neurons, bypassing the sensory neurons.
D
Information goes from the brain to the motor neurons and then directly to the sensory neurons, bypassing the spinal cord.

Explanation

This is a reflex action: sensory neurons carry information about the heat to the spinal cord, where the signal is relayed to motor neurons so the hand moves away quickly. The reflex response can happen before the brain processes the sensation, so choice A, “from the sensory neurons to the spinal cord and then directly to the motor neurons,” best describes the path.

AI-written and checked against the verified answer.

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