Infant respiratory distress syndrome occurs because premature infants lack the ability to produce _______, which _______.
A. mucus; traps bacteria
B. cilia; clear mucus from the trachea
C. surfactant; lowers surface tension
D. alveoli; causes them to become hypoxic
Answer: C. surfactant; lowers surface tension
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_____ muscle is a striated, involuntary muscle.?
A) ?Cardiac B) ?Skeletal C) ?Smooth
Therapeutic cloning is used to assist infertile couples conceive a child.
Answer the following statement true (T) or false (F)
The ________ plexus contains the parasympathetic outflow of the pelvic nerves, sympathetic postganglionic fibers from the inferior mesenteric ganglion, and splanchnic nerves from the sacral sympathetic chain.
Fill in the blank(s) with the appropriate word(s).
The floor of the diencephalon is formed by the
A) hypothalamus. B) thalamus. C) brain stem. D) mesencephalon. E) pons.