Endorphins and Enkephalins

question 43

Multiple Choice

Endorphins and enkephalins

• A) are endogenous morphine-like substances.
• B) are important in the body's natural analgesic system.
• C) block the actions of substance P by binding with opiate receptors.
• D) both (a) and (b) above.
• E) all of these answers.

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Definitions:

Peripheral Nervous System

The segment of the nervous system comprising the nerves and ganglia that are not part of the brain and spinal cord.

Parasympathetic

Relating to the part of the autonomic nervous system that conserves energy by slowing the heart rate and increasing intestinal and gland activity.

Somatic

Related to the body, especially as distinct from the mind or emotions.

Peripheral

Referring to the outer boundary or located away from the central part; in physiology, it often relates to nerves and structures outside the brain and spinal cord.