Nonspecific immune responses
a. come into play whether or not there has been prior experience with the offending agent
b. are triggered by invasion of infectious microorganisms, chemical injury, mechanical trauma, or burns
c. are mediated by lymphocytes
d. have characteristics a and b
e. have none of the above characteristics
D
You might also like to view...
While passing through a village on safari you notice a man with one enormous leg and one normal-sized leg. What could have caused the increased size of the swollen leg?
What will be an ideal response
Permeability of which ion is affected by a positive feedback mechanism once threshold is reached?
a. sodium. b. potassium. c. calcium. d. chloride. e. protein.
Which part of the brain exerts the most control over the autonomic nervous system?
A. The medulla oblongata B. The cerebral cortex C. The hypothalamus D. The thalamus E. The midbrain
Which of the following is not true for ventricular systole?
a. Blood flows through the aorta and the pulmonary trunk. b. The semilunar valves open. c. The ventricles contract. d.The ventricles relax. e. The atrioventricular valves close.