The ________ nuclei within the gray matter of the spinal cord send nerve impulses to skeletal muscles.
A. somatic sensory
B. visceral sensory
C. somatic motor
D. autonomic motor
E. sensory
Answer: C
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Which hormone decreases the concentration of calcium ions in body fluids?
A) triiodothyronine B) thymosin C) parathyroid hormone D) thyroxin E) calcitonin
Within the capillary bed a relatively direct means of arteriole-venule communication is provided by the ________.
Fill in the blank(s) with the appropriate word(s).
The ________ pumps blood into the aorta.
A. right atrium B. right ventricle C. left ventricle D. left atrium
Which of the following functions is associated with the blood?
A. Transport of neurotransmitters across synapses B. Transport of digestive enzymes to the small intestine C. Maintenance of DNA content of egg cells D. Electrical stimulation of the heart E. Delivery of O2 to tissue cells