The skeletal system participates in
A) maintaining blood calcium levels.
B) facilitating transmission of nerve impulses.
C) cushioning abdominal organs such as the kidneys.
D) absorbing the shock of unexpected rapid body movements.
E) All of the answers are correct.
A) maintaining blood calcium levels.
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Normal lymphocyte populations are maintained through lymphopoiesis in the __________.
a. spleen and liver b. blood and the lymph c. lymph in the lymphatic tissues d. bone marrow and lymphatic tissues
When cholinergic receptors are stimulated,
A) sodium ions enter the postsynaptic neuron. B) sodium ions leave the postsynaptic neuron. C) chloride ions enter the postsynaptic neuron. D) chloride ions leave the postsynaptic neuron. E) norepinephrine deactivates acetylcholine.
This figure shows a posterior view of the organs of the female reproductive system. What structures does number 6 indicate?
A. Mesosalpinx B. Fimbriae C. Ovarian tubules D. Cilia E. Mesovaria
In the intestine, ________ ensure(s) that most digested nutrients pass through the epithelial cells and not between them.
A. gap (communicating) junctions B. the plasma membrane C. ground substance D. tight junctions E. desmosomes