Ch. 7: Sensation and Perception Flashcards
Olfactory epithelium
caontains about 10 million sensory neurons .
each sensitive end contains 5-20 hair-like cilia which are capable of bindingmolecules of specific ordorants.
Where do axons of the olfactory sensory neurons and to what part of the brain?
Axons of the olfactory neurons pass through the Cribriform plate into the olfactory bulb of the brain.
There they form synapses upon other neurons in structures called glomeruli.
Evolutionary advantages
Many species have a set of approx. 50 variable genes called the Major Histocompatibility Complex (MHC) that determine an individuls’ odor, or pheromones
What are vomeronasal organs receptors sensetive to? what do they do?
The vomeronasal organ contains receptors sensitive to phermones, which act on other members of species to produce a specific response.
what are Rods?
not senitive to color(black and white only), mostly resonsible for peripheral vision and vision at night.
what are Cones?
Color sensitive, responsible for “slear vision”
From light to sight
light->eye through lens, the clear opening inside the iris.
Light shines on the retna, where all the light receptors are located.
Cones and rods send info. to the optic disk at the back of the eye.
The optic disc electrical impulses to the brain through the optic nerve.
Asymbolia
People that can percieve pain but DO NOT feel a desire to escape pain. The cingulate cortex and insular cortex motivates us to escape from pain.
what do the Cingulate cortex and the Insular cortex do?
They motivate us to escape from pain
Stress induced Analgesisa
Partly dependent on endorphins(“endogenous morphine-like substances”).
Prevented for feeling pain for suvival purposes, or when it is best to ignore wounds
what is belief induced Analgesia
related to religious rituals rituals and the placebo effect
