Sense Organs

how is an impulse from a sense organ interpreted?

according to where they are received in the brain

most sense organs have receptors that pick up stimuli from where?

an external enviroment

receptors that are stimulated by changes in concentration of chemical substances

chemoreceptors

these receptors are associated with the senses of taste and smell

chemoreceptors

what are the most familiar sense organs?

eyes, ears, tongue, nose, and skin

what has extremely fine projections like cilia?

hair cells

what are the 2 types of thermoreceptors?

heat and cold receptors

as receptors adapt, impulses do what?

leave at slower rates until finally they may completely fail to send signals

examples of this type of receptor are sound vibrations, touch, muscle contractions, or movement of joints

mechanoreceptors

hair cells are the most common of this receptor

mechanoreceptors

receptors that respond to mechanical pressures, such as changes in pressure or movement of fluids

mechanoreceptors

small groups of flattened connective tissue cells found in hairless portions of the skin; palms, fingertips, and lips; sensitive to light touch and texture

meissner's corpuscles

large structures of connective tissue fibers and cells; found in deeper subcutaneous of such areas as the hands and feet;they also occur in tendons and ligaments of joints; stimulated by heavy pressure

pacinian corpuscles

receptors that are stimulated by tissue damage and generate impulses interpreted as pain

pain receptors

receptors that respond whenever they are exposed to sufficient intensity of light

photoreceptors

this type of receptor only occurs in the eyes

photoreceptors

projection allows a person to do what?

pinpoint the region of stimulation

the process where the brain projects the sensation back to its apparent source

projection

all sense organs have specialized what for stimuli?

receptors

what receptors are associated with somatic senses?

receptors associated with the skin, muscles, joints, and visceral organs

a feeling that occurs when sensory impulses are interpreted by the brain

sensation

when receptors are subjected to continuous stimulation, many of them go through an adjustment called what?

sensory adaptation

common in epithelial tissue; associated with touch and pressure

sensory nerve fibers

the disorder in which there is a blending or crossing of 2 or more senses

synthesia

at the same time a sensation is created, the brain causes it to seem to come from where?

the receptors being stimulated

how are sense organs classified?

the stimuli that activates them

receptors that respond to heat or cold, either inside or outside of the body

thermoreceptors

what does it mean when a sense organ is a transducer?

they transform one form of energy into another

these receptors are sensitive to mechanical forces

touch and pressure senses