The placenta originates only from the maternal endometrium.
a. true
b. false
Ans: b. false
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Which would result in the greatest stimulation of aldosterone secretion?
A. Decreasing plasma K+ concentration and increasing plasma angiotensin II concentration B. Increasing plasma K+ concentration and increasing plasma angiotensin II concentration C. Increasing plasma Na+ concentration and increasing plasma volume D. Increasing plasma K+ concentration and decreasing plasma angiotensin II concentration E. Decreasing plasma Na+ concentration and decreasing plasma angiontensin II concentration
The central nervous system (CNS) consists of
A) spinal and cranial nerves. B) the cerebrum and cerebellum. C) the brain and spinal cord. D) nerves in the upper and lower limbs.
Areas of the spleen that contain large aggregations of lymphocytes are known as
A) Peyer's patches. B) adenoids. C) white pulp. D) red pulp. E) lymph nodes.
A ________ is a bruise that is visible through the skin.
Fill in the blank(s) with the appropriate word(s).