The two intrinsic defense systems have many components. Which of the following cell types is not a contributor to specific immunity?
A. Natural killer cells
B. Plasma cells
C. B cells
D. T cells
Answer: A. Natural killer cells
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The __________ nervous system regulates motility of esophagus, stomach, and intestines without input from brain or spinal cord.
Fill in the blank(s) with the appropriate word(s).
Frequently, a single hormone has more than one type of target cell and therefore can induce more than one type of effect
a. True b. False Indicate whether the statement is true or false
Aspirin, penicillin and other drugs are cleared from the blood via the kidneys by which of the following processes?
a) tubular reasborption b) tubular secretion c) tubular excretion d) tubular filtration
The main functions of the cardiovascular system are the transport and exchange of respiratory gases, nutrients, and wastes throughout the body.
Indicate whether the statement is true or false.