At what level do the nerves that innervate the diaphragm exit the spine?

a. C1-3
b. C3-5
c. C6-7
d. T1-3


ANS: B
The diaphragm receives its innervation from nerve roots exiting the spinal cord at levels C3-5.

Health Professions

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You are assessing a 7-year-old boy who has signs of shock. What is the low normal systolic blood pressure for a child of this age?

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