Which of the following is not true of the muscular system?
A) It depends upon calcium stored and released from the skeletal system.
B) It depends upon calcitonin and parathyroid hormone levels to maintain calcium homeostasis.
C) It depends upon the integumentary system to protect muscles.
D) It depends upon the cardiovascular system to provide the hemoglobin stored in slow muscle fibers.
E) It depends upon the nervous system to stimulate skeletal muscle tissue to contract.
Answer: D
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How do the kidneys compensate for acid-base imbalances?
A) by reabsorbing H+ B) by reabsorbing bicarbonate ion C) by excreting H+ D) by excreting bicarbonate ion E) all of the above
The ________ communicating ramus carries unmyelinated postganglionic fibers from a sympathetic chain ganglion to a spinal nerve.
Fill in the blank(s) with the appropriate word(s).
Stimulation of granular cells by the sympathetic nervous system causes them to
A. release calcitriol. B. increase endocytosis. C. contract. D. relax.
Which of the following fetal shunts connects the umbilical vein with the inferior vena cava?
A. ductus arteriosus B. umbilical vein C. umbilical artery D. ductus venosus E. foramen ovale