Varicosities and gap junctions are characteristic of which of the following?
A. Unitary smooth muscle
B. Neuromuscular junctions
C. Slow-twitch fibers
D. Multiunit smooth muscle
E. Fast-twitch fibers
Answer: D
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In the diagram of the wrist and hand, where is the capitate bone?
a) D b) E c) F d) G e) H
Opening a potassium channel during the resting potential would cause potassium ions to move along their concentration gradient but against the electrical gradient
Indicate whether the statement is true or false
Which of the following descriptors regarding the trophoblast is false?
A) spreads into the endometrium B) absorbs nutrients released by degenerating endometrial glands C) has both a syncytial and cellular component D) is derived from the inner cell mass E) causes maternal blood vessels to break down
The embryonic heart
A. develops from two endothelial tubes that fuse together. B. consists of four chambers. C. has two atria but only one ventricle. D. doesn't beat until just prior to birth. E. has no passages connecting right side to left side.