Like the ABO system, naturally occurring antibodies develop against the Rh factor
a. True
b. False
Indicate whether the statement is true or false
False
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________ (cells) secrete hydrochloric acid that breaks down bone and releases calcium and phosphate into the blood.
Fill in the blank(s) with the appropriate word(s).
In a capillary bed, relaxation of the precapillary sphincter
A. causes more blood flow through thoroughfare channels. B. causes less blood to flow through capillaries. C. occurs when the tissue in the area does not need more oxygen. D. is voluntary. E. occurs when the tissue in the area needs more oxygen.
The blood vessels that are under the greatest pressure are the
A. arterioles. B. capillaries. C. elastic arteries. D. veins. E. venules.
Which of the following is a correct unit of pressure?
A. Newtons B. kg/cm2 C. N/cm2 D. slugs