Identify the correct match between the blood vessel and its corresponding characteristic.
A) artery/largest lumen
B) arteriole/controls blood pressure
C) capillary/has valves
D) venule/most permeable
E) vein/may be elastic or muscular
B) arteriole/controls blood pressure
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Which statement is true about T cells?
A) They usually directly recognize antigens, which then activates a subpopulation of killer cells. B) Their proliferation is enhanced by interleukins 1 and 2. C) Once activated, they cannot secrete cytokines. D) They will develop into cytotoxic T cells if antigen is complexed with class II MHC proteins.
Olfactory receptors
a. are specialized endings of afferent neurons, not separate cells. b. when stimulated send impulses both to the limbic system for coordination between smell and behavior and to the thalamus and cortex for perception of smell. c. are replaced about every two months. d. both (a) and (b) above. e. all of these answers.
Which blood vessels of the renal medulla run alongside the nephron loops?
A. Efferent arterioles B. Vasa recta C. Arcuate arteries D. Henle's vessels E. Vasa efferentia
Which of the following would NOT normally be present in glomerular filtrate?
a) albumin b) amino acids c) glucose d) urea e) Na+