In clonal selection of B cells, which substance is responsible for determining which cells will eventually become cloned?
A) antigen
B) interferon
C) complement
D) antibody
A
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The phosphate system serves as an excellent __________ buffer
Fill in the blank(s) with correct word
During the BIOPAC activity, why did the subject's Q-T interval shorten after physical exercise?
A) Because the heart contractions are stronger B) Because the heart muscle is receiving too much oxygen C) Because the heart is beating faster, the length of time for a ventricular contraction must shorten. D) Because the heart is beating too fast and the heart is compensating
The walls of the ascending limb of the loop of Henle are freely permeable to water
Indicate whether the statement is true or false.
Which of the following describes the nervous system integrative function?
A) responds to stimuli by gland secretion or muscle contraction B) analyzes sensory information, stores information, makes decisions C) senses changes in the environment