In the blastocyst, the trophoblast will become __________, whereas the embryoblast will become __________.

A. part of the placenta; the yolk sac
B. part of the placenta; the embryo
C. the embryo; part of the placenta
D. the embryo; the yolk sac
E. the yolk sac; the embryo


B. part of the placenta; the embryo

Anatomy & Physiology

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Muscle fibers differ from "typical cells" in that muscle fibers

A) lack a plasma membrane. B) have many nuclei. C) are very small. D) lack mitochondria. E) have large gaps in the cell membrane.

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One of the effects of the growth hormone is the control of fat metabolism

Indicate whether the statement is true or false

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What unit of bone consists of a central canal (containing blood vessels, nerves, and lymph vessels) surrounded by concentric rings of calcified matrix?

A.   Canaliculus B.   Lamella C.   Osteon D.   Osteocyte E.   Trabeculum

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In males, the hormone called ___________ stimulates the cells of Leydig

Fill in the blank(s) with correct word

Anatomy & Physiology