The main class(es) of neurotransmitters involved in regulating mood in vertebrate animals is/are

A. the biogenic amines.
B. acetylcholine and amino acids.
C. gases such as nitric oxide and carbon monoxide.
D. amino acids.
E. acetylcholine.


A. the biogenic amines.

Biology & Microbiology

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During translation which molecule is formed?

a. DNA b. mRNA c. tRNA d. proteins e. ribosomes

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Which of the following pigments enables red algae to utilize the dim light that penetrates ocean surface water as a source of energy?

A) chlorophyll a B) chlorophyll c C) lutein D) phycoerythrin E) ?-carotene

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An endergonic reaction can proceed only if it absorbs:a

randomly available free energy. b. less free energy than is released by a coupled exergonic reaction. c. more free energy than is released by a coupled exergonic reaction. d. less free energy than is released by a coupled endergonic reaction. e. the same amount of free energy that is absorbed by the enzymatic breakdown of proteins.

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Arthritis is a common result of aging, affecting persons' ability to ________

A) catch their breath after exercise B) move their joints C) heal broken bones D) produce red blood cells

Biology & Microbiology