Nitrogen Gas Accounts for What Percentage of the Atmosphere

question 42

Multiple Choice

Nitrogen gas accounts for what percentage of the atmosphere?

• A) 0.03%
• B) 1%
• C) Approximately 50%
• D) 78%
• E) 99%

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Definitions:

Inhibitory Neurotransmitter

A type of chemical messenger that reduces or inhibits the likelihood of the neuron it acts upon to fire an action potential.

GABA

Gamma-Aminobutyric acid (GABA) is a neurotransmitter in the central nervous system that inhibits nerve transmission in the brain, calms neuronal activity, and is involved in reducing anxiety.

Serotonin

A neurotransmitter involved in various functions such as mood regulation, digestion, and sleep that can affect an individual's emotional state and general well-being.

Saclike Structures

Biological pouches in organisms that serve various functions such as storage, digestion, or transport of substances.