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

Anatomy & Physiology

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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.

Anatomy & Physiology

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.

Anatomy & Physiology

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

Anatomy & Physiology

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

Anatomy & Physiology