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Sensory receptor
Chemo-
receptors sensitive to changes in chemical concentration
Pain receptors:
detect tissue damage
Thermoreceptors:
respond to temperature differences
Mechanoreceptors:
respond to changes in pressure or movement
Photoreceptors:
respond to light; found in the eye
propioreceptor
Aware of where your body parts are withut looking at them
A sensation
Sensation occurs when sensory receptors detect sensory stimuli.
Activates according to its receptor: damage, heat, pressure, etc.
A perception
Perception involves the organization, interpretation, and conscious experience of those sensations.
projection
Awareness of stimuli
Receptive Fields
What each repect is able to sense.
Specialization
Cones -see red,blue green anad light, not great at senseing motion
Robs- are really good at seeing mothing but they arent good at seeing colos
Fovea:
in the eye
area of concentrated receptors Its high density of cone photoreceptors allows the human eye to focus on the object and the details within the objec
Eye
An organ that allows one to see.
Retna
the light-sensitive layer of tissue at the back of the eyeball. Images that come through the eye’s lens are focused in retina.
Photoreceptors:
Modified neurons, the visual receptor cells
Cones:
Provide sharp images in bright light and color vision (3 colors)
Fovea contains densely packed cones, but no rods
Rods:
More sensitive to light than cones, function in dim light
Provide black and white vision
Provide less precise images (general outlines) than cones,
There are many more rods than cones in the retina
Hearing
As the fluid moves, 25,000 Hair cells, are set into motion. These Hair cells transform the vibrations into electrical impulses that then travel along the auditory nerve to the brain. The brain then interprets these signals, and this is how we hear.
Cochlea
a fluid-filled, spiral-shaped cavity found in the inner ear that plays a vital role in the sense of hearing and participates in the process of auditory transduction.
Somatic Pain
: skin and muscles, respond to damage to tissue
tearing, burning, electrical, chemical
Visceral Pain
internal organs, respond to massive damage
Only receptors that organs have
Stretching, tissue death, emergency chemicals, loss of blood flow
Referred pain:
when visceral response is confused with somatic
Taste buds
Taste buds are mostly found on the tongue
Sweet, salty, sour, bitter, umami
All are distributed on the tongue, some areas densely
taste hairs
Grabs the material and shoves it into the taste bud.
Olfactory cells
Smell is Dependent on olfactory cells, which carry receptor proteins
Estimated that there are 400 receptor proteins