White blood cells engulf foreign particles by means of
A. macrocytosis.
B. phagocytosis.
C. exocytosis.
D. pinocytosis.
E. prestocytosis.
B
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Hemoglobin
a. consists of a protein made up of four highly folded polypeptide chains and four iron-containing nonprotein, nitrogenous groups b. appears reddish when combined with O2 and bluish when deoxygenated c. can combine only with O2 d. has characteristics a and b e. has characteristics a and c
When comparing slow muscle fibers to fast muscle fibers, slow fibers
A) take about three times as long to reach peak tension B) have much smaller fiber diameters C) are rich in the red protein myoglobin D) generate much less tension E) All of the answer are correct
Which of the following hormones causes water retention by the kidneys in times of dehydration?
A. Glucagon B. Adrenal androgens C. ADH D. PTH E. Somatostatin
Excess cortisol could result in:
A) increased parasympathetic nervous system activation. B) an alkaline blood pH. C) low blood pressure. D) high blood glucose levels.