A fetus is nourished by way of a disc-shaped organ, the ________, attached to the uterine wall.

A. placenta
B. blastocyst
C. trophoblast
D. amnion
E. chorion


Answer: A

Anatomy & Physiology

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Stimulation of ?1 receptors present on smooth muscle cells of blood vessels to the skin by norepinephrine results in:

A) vasodilation. B) bronchodilation. C) vasoconstriction. D) sweating.

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The smallest muscle of the sural region that takes part in plantar flexion is the ________ muscle.

A) extensor hallucis longus B) plantaris C) gastrocnemius D) tibialis anterior E) soleus

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The most commonly used oral contraceptives contain

A) synthetic androgen. B) gonadotropins. C) FSH and LH. D) synthetic estrogen and progesterone.

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