Neuropeptides are
A) inhibitory neurotransmitters.
B) substances that modify the actions of neurotransmitters.
C) a type of catecholamine such as epinephrine.
D) excitatory neurotransmitters.
Answer: B) substances that modify the actions of neurotransmitters.
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Muddy lake water is an example of a(n)
A) colloid. B) suspension. C) solute. D) solvent. E) solution.
Which of the following statements is true concerning the mammary glands of both males and females?
A) The only time hormones target breast tissue is during pregnancy and lactation. B) All lumps identified in breast tissue are malignant. C) The mammary glands are modified sweat glands that are actually part of the integumentary system. D) Both sexes are equally prone to breast cancer.
A very strong stimulus produces a larger action potential.
Answer the following statement true (T) or false (F)
What appears to have a significant role in the loss of kidney function with age?
A. The renal pelvis narrows B. The juxtaglomerular apparatus hypertrophies C. Kidneys swell in size D. Glomeruli degenerate