When a Physician Taps the Patellar Tendon with a Hammer

question 102

Multiple Choice

When a physician taps the patellar tendon with a hammer, it causes a knee jerk reflex by sending stretch signals to:

• A)motor neurons in the spinal cord that cause muscles to contract.
• B)motor neurons in the cortex that cause muscles to contract.
• C)the thalamus, which sends signals to motor neurons to contract.
• D)the cerebellum, which sends signals to motor neurons to contract.

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