What do the left common carotid, brachiocephalic artery, and left subclavian all have in common?
A. They all are found in the abdominal cavity.
B. They are all coronary vessels.
C. They all carry blood to the head.
D. They all branch from the aortic arch.
Answer: D
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Efferent neurons leave the spinal cord through the dorsal root
Indicate whether the statement is true or false
Cerebrospinal fluid is
A. clear and liquid. B. red. C. yellow in the CNS and clear in the PNS. D. white and thick.
A condition that increases lung compliance is
A) lung cancer. B) respiratory distress syndrome. C) loss of surfactant. D) emphysema. E) pneumothorax.
Reduced hormone concentration in the blood often causes target cells to
A. up-regulate receptors in order to increase cell sensitivity. B. up-regulate receptors in order to decrease cell sensitivity. C. down-regulate receptors in order to increase cell sensitivity. D. down-regulate receptors in order to decrease cell sensitivity.