The Earliest Identified Human Artifacts Are Approximately _______ Years Old

question 48

Multiple Choice

The earliest identified human artifacts are approximately _______ years old.

• A)250,000
• B)5.5 million
• C)2.6 million
• D)10,000
• E)1.25 million

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Definitions:

Hormones

Biological compounds synthesized and secreted by endocrine glands in the body that regulate physiological activities and behavioral responses.

Endocrine Glands

Glands of the endocrine system that release hormones directly into the bloodstream, regulating various bodily processes.

Neurotransmitters

Chemical messengers in the nervous system that transmit signals from one neuron to another, influencing various functions such as mood and behavior.

Circulatory Transmitters

Substances in the body, such as neurotransmitters and hormones, that play crucial roles in the circulatory system.