The Somatic Nervous System

question 123

Multiple Choice

The somatic nervous system

• A) is part of the PNS.
• B) participates in sensory and motor interactions with the external environment.
• C) is part of the ANS.
• D) all of the above
• E) both A and B

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Definitions:

Neurons

The fundamental units of the brain and nervous system responsible for receiving sensory input from the external world, processing this information, and sending commands to the body.

Brain

The organ located in the head of an animal that controls its actions, thoughts, feelings, and interactions with the environment; central to the nervous system.

Mood Molecule

A colloquial term often used to refer to serotonin, a neurotransmitter that is linked to regulating mood, emotions, and several other functions in the body.

Neurotransmitter

Substances that act as intermediaries, sending signals from one nerve cell to another neuron, muscle cell, or gland cell across a chemical synapse.