anat jay t 3
Terms
undefined, object
copy deck
- nerve impulses sent to brain via sensory neurons
- sensations
- brain interprets sensations- different senses depend on where impulse goes
- perception
- cell absorbs energy of stimulus
- reception
- receptor cell changes energy into action potential = receptor potential
- transduction
- energy is strengthened
- amplification
- conduction of receptor potential to the CNS
- transmission
- processing of sensory information- signals are summed
- integration
- dendrites whose terminal ends have little or no physical specialization
- free nerve endings
- dendrites whose terminal ends are enclosed in a capsule of connective tissue
- encapsulated nerve endings
- receive info from outside world; occur at or near surface of skin; incl. tactile sensations (touch, pain, temp) as well as vision, hearing, smell, taste
- exteroreceptors
- receive info from internal environment; blood pH, blood pressure, body temp.
- interoreceptors
- respond to stimuli occurring in skeletal muscles, tendons, ligaments, and joints
- proprioreceptors
- respond to physical force such as pressure (touch or blood pressure) and stretch
- mechanoreceptors
- info about dissolved chemicals during sensations of taste + smell and to changes in internal body chemistry
- chemoreceptors
- respond to categories of related chemicals (sweet, sour, bitter, salt)
- olfactory (smell) and gustatory (taste) receptors
- respond to heat/cold + regulate body temp (send info to hypothalamus- homeostasis)
- thermoreceptors
- respond to light
- photoreceptors
- naked dendrites in epidermis - negative reaction follows
- pain receptors