The residual volume of the lungs is approximately
a. 1200 milliliters.
b. 2000 milliliters.
c. 4800 milliliters.
d. 3800 milliliters.
e. 5200 milliliters.
A
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Form refers to ________, and function refers to ________.
A. physiological actions; environmental actions B. anatomical structure; physiological actions C. physiological actions; anatomical structure D. anatomical structure; environmental actions
When fishery effort increases and catch remains stable or decreases
a. fishers need to find alternative methods to catch fish. b. fishers simply need to relocate to another patch. c. the abundance of the fish is declining. d. costs remain high. e. the size of fish caught tends to increase.
The Nef protein helps HIV evade the adaptive immune system by
a. destroying cytotoxic T cells. b. destroying class I MHC proteins as soon as they get to the surface of infected cells. c. destroying class I MHC proteins in the cytoplasm. d. binding to class I MHC proteins at the cell surface, thereby blocking their availability to cytotoxic T cells. e. binding to class I MHC proteins in the cytoplasm, thereby preventing their transport to the cell surface.
In ponds and lakes, the zone beneath the depth of effective light penetration but above the bottom is referred to as the
A) littoral zone. B) limnetic zone. C) profundal zone. D) benthic zone.