The activation of the sense organs by a source of physical energy
Define and describe perception.
The sorting out of, interpretation, analysis and integration of stimuli by the sense organs and brain
Define absolute threshold
The smallest intensity of a stimulus that must be present for the stimulus to be detected
Define Just Noticeable Difference
Just Noticeable Difference the smallest level of added or reduced stimulation required to sense that a change in stimulation has occurred
You are sitting directly in front of the marching band
at a pep rally. When they first begin to
play, it is so loud that you think it is unbearable. After 30 minutes, you hardly notice the brass
section screeching behind you. This is
an example of sensory
location and function of the iris
part of eye located near the optic nerve, It separates the anterior and posterior chambers of the eyeball
location and function of the pupil
located in the center of the iris, It regulates the amount of light that enters the eye
location and function of the fovea
located in the back of the eye, flips image right side up
location and function of rods
located in the back of the eyeball, highly sensitive to light
location and function of cones
located in back of eyeball, sharp focus and color perception
What are ganglion cells? Where are they located? What is their function?
Located in the retina,works like cons and rods
Describe the trichromatic theory of vision.
The theory that there are three kinds of cones in the retina, each of which responds primarily to a specific range of wavelengths
Describe the opponent process theory.
The theory that receptor cells for color are linked in pairs, working in opposition to each other
What is the structure and function of the cochlea?
A coiled tube in the ear filled with fluid that vibrates in response to sound
Describe the gate-control theory of pain
The theory that particular nerve receptors in the spinal cord lead to specific areas of the brain related to pain
What happens to our skeletal muscles during REM sleep?
Our muscles relax so we don't act out our dreams
About what percentage of total sleep time do adults spend in REM sleep?
What symptoms are associated with cocaine withdrawal?
General fatigue, Prolonged sleep, depression
What symptoms are associated with heroine withdrawal?
Anxiety, Vomiting, Sneezing, diarrhea, lower back pain
What effects can be the consequence of long-term abuse of marijuana?
Memory difficulties, increase body temperature
decreases the likelihood of a behavior occurring again
increases the likelihood of a behavior occurring again