Water flows through a selectively permeable membrane in a process called ________, but water molecules cross the membrane more easily through channels of transmembrane proteins called ________
A) filtration; water pumps
B) osmosis; water pumps
C) filtration; aquaporins
D) osmosis; aquaporins
E) osmosis; uniport
D
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Which of the following is an excitatory neurotransmitter in the brain?
A. Gamma-aminobutyric acid (GABA) B. Aspartate C. Glutamate D. Glycine E. Lipofuscin
In one passage through a bed of systemic blood capillaries, the blood gives up about what percentage of its oxygen?
A. 30% to 40% B. 5% to 10% C. 20% to 25% D. 70% to 85% E. 10% to 15%
A cut dividing the body into anterior and posterior portions is called a:
a. sagittal section b. frontal section c. transverse section d. none of the above
Consider a blood pressure reading of 120/80. 120 corresponds to the
A) diastolic pressure. B) systolic pressure. C) pulse pressure. D) mean arterial pressure. E) blood osmotic pressure.