Because of the meaning of the combining form phren/o-, we know that when the phrenic nerve is stimulated, it causes the ________ to contract
A) diaphragm
B) lungs
C) mediastinum
D) pharynx
A
Explanation: A) Correct! Phren/o- means "diaphragm; mind."
B) The phrenic nerve does not cause the lungs to contract.
C) The phrenic nerve does not cause the mediastinum to contract.
D) The phrenic nerve does not cause the pharynx to contract.
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