23
QuizMultiple Choice

Lab: Blood Typing — Cumulative exam

Question 23 • Biology - SC3209 IC

When Brian touches a hot object, which structures are at work to help him react appropriately to protect himself?

Answer
A
sensory neurons, brain, and motor neurons
B
sensory neurons, myelin sheath, and brain
C
sensory neurons, interneurons, and motor neurons
D
myelin sheath, interneurons, and motor neurons

Explanation

Touching a hot object triggers a protective reflex. Sensory neurons carry the signal from the skin into the spinal cord, where interneurons pass it to motor neurons; motor neurons then activate muscles to pull the hand away. This is the pathway described by “sensory neurons, interneurons, and motor neurons.”

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