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
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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.
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
One of the effects of the growth hormone is the control of fat metabolism
Indicate whether the statement is true or false
In males, the hormone called ___________ stimulates the cells of Leydig
Fill in the blank(s) with correct word