Differences in body size and proportions between males and females result from the different effects of male and female ________, which affect the growth of the bones.
A) calcitriol
B) vitamins A & C
C) vitamin D
D) sex hormones
E) calcium and phosphate salts
sex hormones
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Individuals with type O blood are considered universal donors:
1.because they are usually very caring people. 2.because their red blood cells carry neither A nor B antigens. 3.because their plasma contains both A and B antibodies. 4.and are also called the universal recipients because they can receive any type of blood.
Why are injections administered in the hypodermis when administering drugs using a hypodermic needle?
A) There is an abundance of capillaries in the hypodermis. B) The hypodermis is highly innervated. C) Since it is vascularized, the hypodermis can absorb a lot of fluid. D) Both elastic fibers and collagen fibers are present. E) The presence of blood vessels and lymphatic vessels help local tissues defend and repair themselves.
Which of the following cells is involved in cell mediated immunity?
a. T8-cell b. Pre-T cells c. B-Cells d. Plasma cells
A labeled line is a(n)
A) translation of complex sensory information. B) link between a receptor and the CNS processing center. C) reduction in sensitivity. D) stimulation that produces action potentials. E) adjustment for sensitivity adaptation.