Morphine,codeine,and Heroin Are All Opiates That Function by

question 4

Multiple Choice

Morphine,codeine,and heroin are all opiates that function by

• A)binding to GABA receptors.
• B)binding to acetylcholine receptors.
• C)binding to endorphin receptors.
• D)blocking the removal of serotonin from synapses.

---

Definitions:

Rods

Retinal receptors that detect black, white, and gray; necessary for peripheral and twilight vision, when cones don’t respond.

Iris

The colored part of the eye that controls the size of the pupil and thus the amount of light that enters the eye.

Light Entry

The process or manner by which light enters an area or passes through a medium.

Young-Helmholtz Theory

A theory of color vision that proposes the presence of three types of color receptors in the eye, each sensitive to red, green, or blue light.