Blood within the pulmonary veins returns to the ________.
A) right atrium
B) left atrium
C) right ventricle
D) left ventricle
B) left atrium
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From about week 20 to 36, fine hair called __________ covers the fetus.
Fill in the blank(s) with the appropriate word(s).
Most fibers of the parasympathetic nervous system travel in the ________
A) trigeminal B) vagus C) facial D) sciatic E) splanchnic
Within a single protein, which of the following are you likely to find?
A. Disulfide bridges B. Ionic bonds C. Hydrogen bonds D. Hydrophobic interactions E. You are likely to find all of these within a single protein.
Eyebrow hairs are always shorter than hairs on your head because ________.
A) they grow much slower B) eyebrow follicles are only active for a few months C) the vascular supply of the eyebrow follicle is one-tenth that of the head hair follicle D) hormones in the eyebrow follicle switch the growth off after it has reached a predetermined length