The decidua basalis of the endometrium and the chorionic villi of the fetus grow together to form the
A. placenta.
B. ectoderm.
C. blastocyst.
D. amnion.
E. morula.
Answer: A
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Raising the potassium ion concentration in the extracellular fluid surrounding a nerve cell will have what effect?
A) depolarize it B) hyperpolarize it C) increase the magnitude of the potassium equilibrium potential D) decrease the magnitude of the potassium equilibrium potential E) both hyperpolarize it and decrease the magnitude of the potassium equilibrium potential
Which of the following factors is NOT required for high efficiency gas exchange?
A) Moist surface B) Large surface area C) Low diffusion distance D) High cell volume
A boy has a genetic mutation such that FSH is not produced, but LH is normal. After the boy grows to maturity, it is likely he will
A) not develop secondary sex characteristics. B) be sterile. C) be impotent. D) have impaired function of the interstitial cells. E) produce large amounts of inhibin.
A joint between two bones is more technically referred to as a(n) __________.
Fill in the blank(s) with the appropriate word(s).