Which of the following cannot pass through a plasma membrane by primary active transport?
a. Sodium
b. Glucose
c. Calcium
d. Potassium
e. Hydrogen ions
B
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John Smith works outdoors in the winter at a ski resort. His thyroid hormone levels are
A. higher in the winter to increase body temperature. B. increased in the summer after his job to increase body temperature. C. lower in the winter to conserve body heat. D. unaffected by his job. E. lowered in the summer after his job to decrease body temperature.
Hypotension is usually a systolic reading under ________ mm Hg.?
A) ?80 B) ?90 C) ?100 D) ?110
Epinephrine and norepinephrine are secreted by the
A) Adrenal cortex. B) Chromaffin cells. C) Heart. D) Kidneys.
Inulin and para-aminohippuric acid (PAH) can be used to determine glomerular filtration rate and the rate of blood flow through the kidneys, respectively.
Answer the following statement true (T) or false (F)