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
Answer:
A) damaged tissue cells
C) B cells
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A diploid individual carrying two different alleles at a given gene locus is called
A. homologous. B. heterozygous. C. homozygous. D. polygenic.
Why aren't ferns commonly found in deserts?
A. Fern fronds are sensitive to UV light. B. Fern spores are unable to resist prolonged dry conditions. C. Ferns are non-vascular and cannot absorb water from deep within the soil. D. Fern pollen is spread by insects that do not occur in deserts.
In a classic experiment, Otto Loewi electrically stimulated the vagus nerve of a frog heart. He then took the fluid bathing the stimulated heart and applied it to a second frog heart. The beating rate of both hearts slowed down with this treatment. Based on this response, you can assume the nerve he stimulated was part of the
A. parasympathetic system. B. sympathetic system. C. somatic system. D. atrioventricular system. E. central nervous system.
To which class of neurotransmitters does dopamine belong?
a. acetylcholine b. monoamines c. amino acids d. neuropeptides e. gaseous neurotransmitters