The largest bone of the pelvic girdle is the
A) ischium.
B) sacrum.
C) acetabulum.
D) pubis.
E) ilium.
E) ilium.
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Bicarbonate (HCO3-) is a
?A. strong proton donor.?B. strong proton acceptor.?C. weak proton donor.?D. weak proton acceptor.
The concentration of a particular antibody within the blood is referred to as the antibody ________
Fill in the blank with correct word.
Which of the following is true regarding unmyelinated nerve fibers in the PNS?
A. A Schwann cell folds its plasma membrane around several fibers. B. A Schwann cells wraps its plasma membrane around each individual fiber as it does with myelinated fibers. C. An oligodendrocyte cells wraps its plasma membrane around each fiber as it does with myelinated fibers. D. Satellite cells cluster around each axon to form a pseudo-myelin sheath.
________, especially those in the arms and legs, have valves to prevent backflow.
A. Veins B. Capillaries C. Arteries