In the nucleotide sequence ACTGG, what does C stand for?
a. cysteine
b. cytotoxic
c. cytosine
d. chargaff
e. cytoplasm
ANSWER: c
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Identify all of the following cells are capable of releasing histamine
A) damaged tissue cells B) mast cells C) B cells D) Red blood cells
When growing conditions are not right, many bacteria form
A. Antibodies B. Acid C. Buds D. Endospores
What direct effect do histamines and leukotrienes have on capillaries?
a. They decrease the diameter of capillaries. b. They prevent phagocytes from sticking to the walls of capillaries. c. They allow capillary walls to open and become leaky.
A dehydrated runner drinks a lot of water after a race. They rehydrate because
A. the stomach and bloodstream are isotonic compared to each other. B. the bloodstream is hypotonic compared to the stomach. C. water will diffuse from a low to high concentration. D. the stomach is hypotonic compared to the bloodstream.