________ Act on the Nervous System to Alter States of Consciousness

question 37

Multiple Choice

________ act on the nervous system to alter states of consciousness, modify perceptions, and change moods.

• A) Antiemetics
• B) Biofeedback therapies
• C) Antihypertensives
• D) Psychoactive drugs

---

Definitions:

Gate-Control Theory

a theory proposing that the perception of pain is not a direct result of activation of pain receptor neurons, but rather its gate can be closed by signals from the brain.

Large-Fiber Activity

The involvement or action of myelinated nerve fibers that are responsible for transmitting fast and sharp pain signals.

Oval Window

A membrane-covered opening that separates the middle ear from the inner ear and transmits sound vibrations from the ossicles to the cochlea.

Vestibular Sacs

Structures in the inner ear that are responsible for sensing gravity and linear acceleration, helping to maintain balance and spatial orientation.