Active natural immunity occurs when
A. antibodies pass from a pregnant mother to her fetus.
B. antibodies are injected into a host.
C. an individual develops a disease.
D. a person is vaccinated.
E. antibodies are passed in breast milk.
C
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In the cat, the head is ________ to the tail. In the human, the head is ________ to the gluteal region (buttock).
A. anterior; superior B. ventral; distal C. anterior; posterior D. superior; superior E. posterior; dorsal
The protein that gives a red color to erythrocytes is __________.
Fill in the blank(s) with the appropriate word(s).
Postganglionic sympathetic axons are carried from the sympathetic trunk to the spinal nerve by the
A. pterygopalatine ganglion. B. splanchnic nerves. C. superior cervical ganglion. D. gray rami communicantes. E. white rami communicantes.
Which of the following is NOT a function of proteins in the body?
A. Enzymes B. Receptors for regulator molecules C. Compose genes D. Carriers for membrane transport