Histamine is an example of a(n)

A) endocrine hormone.
B) synaptic messenger.
C) prostaglandin.
D) neurotransmitter.
E) local hormone.


E

Biology & Microbiology

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Antigen-presenting cells present antigens to

A) B lymphocytes. B) T lymphocytes. C) dendritic cells. D) neutrophils.

Biology & Microbiology

Species on oceanic islands often closely resemble species on the nearest mainland, suggesting that the island and

mainland species share a common ancestry.

a. True b. False

Biology & Microbiology

A microbiologist must culture a patient's feces for intestinal pathogens. Which of the following components would likely be present in a selective medium for this purpose?

A. NaCl B. Thioglycolic acid C. Bile salts D. Peptone E. Sheep red blood cells

Biology & Microbiology

Population ________ is the number of individuals per unit area, or per unit volume

Fill in the blank(s) with correct word

Biology & Microbiology