Chapter 2: Senses and Perception Flashcards
sheet of cells in the inner surface of eyeball
retina
first thing that light passes through
cornea
regulates how much light enters
iris
bends light to focus on retina
lens
how objects are mapped onto the eyeball
two-dimensional reversed image
nerve that signals travel through from the eye to the brain
optic nerve
three types of neurons in retina
photoreceptors, interneurons, and ganglion cells
located in the most peripheral layer of the retina
rods and cones
amount of photoreceptors
125 million photoreceptors
95% of structures in human eye
rods
structures used for reading and driving
cones
vibrates in response to changes in air pressure in the ear
eardrum (tympanic membrane)
vibrations sent to the following bones
malleus, incus, stapes
pushes on the oval window
stapes
fluid filled region of inner ear
cochlea
hair cells excite this structure
auditory nerve
underlying reason to hearing disorders
loss of hair cells
taste is also called
gustation
smell is also called
olfaction
creation of new neurons
neurogenesis
system responsible for touch sensations
somatosensory
used to perceive touch sensations
touch receptors
area where touch receptor signals are translated
somatosensory cortex
receptors used to feel pain
nociceptors
opioids produced by the body that act like the analgesic morphine
endorphins
analgesic type
morphine
used to regulate pain
cognitive behavioral therapy
