Damage to a ________ would result in lack of sympathetic control of the heart.
A. spinal nerve
B. sympathetic nerve
C. cranial nerve
D. splanchnic nerve
Answer: B
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A change from Fe2+ to Fe3+ would require a change in the number of ________.
Fill in the blank(s) with the appropriate word(s).
When the pH of body fluids begins to fall, proteins will
A) release a hydrogen from the amino group. B) bind a hydrogen at the amino group. C) release a hydrogen from the carboxyl group. D) bind a hydrogen at the carboxyl group. E) cause none of these actions.
The root of each tooth sits in a bony cavity known as a(n)
A) cement. B) alveolus. C) sulcus. D) buccal. E) ileum.
Which muscle(s) of respiration is(are) innervated by the phrenic nerve?
A. Diaphragm B. Innermost intercostals C. External intercostals D. Pectoralis major E. Internal intercostals