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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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
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.
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
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.