The membrane of resting nerve cells is more permeable to ________ ions than ________ ions.
A. potassium, sodium
B. sodium, potassium
C. calcium, potassium
D. chloride, potassium
Answer: A
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Which is not one of the changes in the urinary system due to aging?
A. Gradual increase in kidney size due to fluid retention B. Decreased glomerular filtration rate C. Decrease in number of functional nephrons D. Decreased response to aldosterone and ADH E. Reduced blood flow to the kidneys
Blood returning from the vena cava:
a. enters the right atrium. b. enters the left atrium. c. is poorly oxygenated. d. both (a) and (c) above. e. both (b) and (c) above.
Which of the following does NOT deliver blood to the right atrium?
inferior vena cava pulmonary veins superior vena cava coronary sinus
Which of the following situations would have the greatest affect on depth perception?
A. having a deficiency of vitamin D B. having conjunctivitis C. the amount of pupillary dilation D. losing one eye in an accident E. the local climate where one lives