Oxygenated blood returns to the heart from the lungs via four pulmonary ____
a. arteries
b. arterioles
c. veins
d. venules
c
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The lateral funiculus contains both ascending and descending tracts
Indicate whether this statement is true or false.
In positive selection of T-lymphocytes, those cells that
A. bind self antigens are eliminated. B. can bind MHC survive. C. bind to self antigens survive. D. bind to MHC class II are eliminated.
Involution occurs because
a. FSH and LH levels rise b. uterine contractions strengthened the myometrium c. hCG levels fall d. of a fall in circulating estrogen and progesterone e. both (c) and (d)
The reticular formation in the brain stem and thalamus contains the __________ system, which controls one's alertness and ability to focus on a task at hand
Fill in the blank(s) with correct word