During the resting potential
a. K+ ions leave the cell along a concentration gradient and along an electrical gradient.
b. K+ ions leave the cell against a concentration gradient but along an electrical gradient.
c. Na+ ions enter the cell along a concentration gradient and along an electrical gradient.
d. Na+ ions enter the cell along a concentration gradient but against an electrical gradient.
e. Cl- ions enter the cell along a concentration gradient and along an electrical gradient.
C
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Which nervous system dominates the control of effector organs under normal, everyday conditions?
a. parasympathetic nervous system b. sympathetic nervous system c. both the parasympathetic and sympathetic nervous systems
Which blood type is called the universal donor?
A) Type O B) Type A C) Type B D) Type AB
A display of the chromosomes of a somatic cell during metaphase of mitosis is the
A. karyotype. B. autosome. C. homolog. D. locus. E. genome.
Which of the following statements correctly list the partial pressures of nitrogen, oxygen, carbon dioxide, and water vapor?
A. PN2 is 78.6% of 760 or 597 mmHg, PO2 is 20.9% of 760 or 159 mmHg, PCO2 is 0.04% of 760 or 0.3 mmHg, and the remainder 3.7 mmHg is the partial pressure of water vapor. B. PN2 is 0.04% of 760 or 0.3 mmHg, PO2 is 78.6% of 760 or 597 mmHg, PCO2 is 20.9% of 760 or 159 mmHg, and the remainder 3.7 mmHg is the partial pressure of water vapor. C. PN2 is 78.6% of 760 or 597 mmHg, PO2 is 0.04% of 760 or 0.3 mmHg, PCO2 is 20.9% of 760 or 159 mmHg, and the remainder 3.7 mmHg is the partial pressure of water vapor. D. None of the answers are correct.