The amount of oxygen removed from the vascular system is known as the ____
A) ?aerobic capacity
B) ?metabolic difference
C) ?arterial-venous oxygen difference
D) ?oxygen uptake
E) workload
C
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What is currently the best explanation for what determines whether a T cell develops into a CD8+ T cell or a CD4+ T cell?
A. CD4/TCR coengagement suppresses CD8 expression, and CD8/TCR coengagement suppresses CD4 expression. B. T cells randomly down-regulate CD4 or CD8, and only cells that still bind the appropriate MHC will get a strong enough signal to survive. C. CD4 or CD8 expression is determined by the strength and duration of the TCR/MHC interaction. D. CD4 or CD8 expression is predestined in the bone marrow. E. Only ?? T cells express CD8.
The combining form cusp/o- means ________
A) "gate; opening" B) "heart valve" C) "intima" D) "point; projection"
Salts of aluminum can bring about
a. constipation c. muscle pain b. dysentery d. diarrhea
Excessive production of ______ in the female can lead to cancer of the breast and uterus.
Fill in the blank(s) with the appropriate word(s).