Which statement is true?
a. The ratio of carbon dioxide produced to oxygen consumed is greater than one in healthy adults.
b. The partial pressure of oxygen in the lungs is greatest just before exhalation.
c. The partial pressure of carbon dioxide is greatest in venous blood.
d. Partial pressures are the measurement of Hg displacement in the lungs.
c. The partial pressure of carbon dioxide is greatest in venous blood.
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Which blood type is the universal donor?
1.A+ 2.B 3.AB+ 4.AB 5.O
By a __________, transpiration pulls water upward by creating a continuous negative pressure (or
tension) inside xylem from leaves to roots. Fill in the blank(s) with the appropriate word(s).
The cell-mediated immune response is a function of ____
a. B cells b. T cells c. plasma cells d. blood cells e. antigen producing cells
The number of hosts in the life cycle of a tapeworm is
A. one. B. two. C. three. D. different for different types of tapeworms.