During the process of implantation, the enzymes released from the ________ enable the blastocysts to penetrate the endometrium.
A. acrosomes of sperm
B. uterus
C. trophoblast
D. placenta
Answer: C
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Sympathetic splanchnic nerves are composed of
A. preganglionic sympathetic axons that synapse in a sympathetic trunk ganglion. B. preganglionic sympathetic axons that did not synapse in a sympathetic trunk ganglion. C. postganglionic sympathetic axons that synapse in a sympathetic trunk ganglion. D. postganglionic sympathetic axons that did not synapse in a sympathetic trunk ganglion. E. None of the choices is correct.
Actin myofilaments
A. are held in place by the M line. B. contain strands of fibrous actin. C. resemble bundles of minute golf clubs. D. contain both myosin and tropomyosin. E. are the thickest proteins in muscle.
The figure illustrates a lateral view of the right eyeball. What does "C" represent?
A. Inferior oblique B. Lateral rectus C. Inferior rectus D. Superior oblique E. Superior rectus
In each ventricle is a blood vessel network called the ________ that produces cerebrospinal fluid
A) choroid plexus B) jugular vein C) carotid artery D) vertebral artery E) dural sinus