When We Are Anxious or Fearful, ______

question 3

Multiple Choice

When we are anxious or fearful, ______.

• A) neither the sympathetic nor the parasympathetic divisions are active
• B) the sympathetic division is most active
• C) the parasympathetic division is most active
• D) both the sympathetic and parasympathetic divisions are equally active

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Definitions:

Astrocyte

A type of glial cell in the brain and spinal cord that provides support and nutrition, maintains the extracellular ionic balance, and participates in the repair and scarring process of the brain and spinal cord following traumatic injuries.

Axon Terminals

The distal terminations of the branches of an axon, responsible for releasing neurotransmitters to transmit signals to other neurons or muscles.

Nerve Impulse Conduction

The process by which nerve cells (neurons) transmit electrical signals along their axons to communicate with other neurons or muscles.

Myelin Sheath

A fatty layer that surrounds the axons of some neurons, providing electrical insulation and increasing the speed at which nerve impulses are conducted.