Which of the Following Not Generally Thought of as Matter

question 61

Multiple Choice

Which of the following not generally thought of as matter?

• A)light
• B)trees
• C)air
• D)clouds
• E)rain

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Definitions:

Agonist

A chemical or drug that binds to receptors in the brain and activates them to produce a biological response.

Neurotransmitter

Chemical messengers that transmit signals across a chemical synapse from one neuron to another 'target' neuron, muscle cell, or gland cell.

Endogenous

Originating from within an organism, tissue, or cell, used to describe processes or substances that are internally generated.

Naturally Occurring

Referring to substances, phenomena, or processes that exist or happen without human intervention.