Test 2 - Lecture 1 (sensory reception) Flashcards
photoreceptors
vision
chemoreceptors
smell/taste
mechanoreceptors
touch
nociceptors
pain
“the state of” implies current conditions…
both within and outside the body
peripheral
outside the CNS
stimulus
physical energy to which a particular sensory receptor will respond
transduction
neurochemical process through which a sensory neuron transforms the stimulus energy into a bioelectrical signal
bioelectrical signal
action potentials that originate from a sensory neuron
mechanical receptors stimulated by
pressure/sound
electromagnetic receptors stimulated by
radiant heat; light (retna)
thermal receptors stimulated by
heat
chemical receptors stimulated by
aciditiy; concentration
modality
type of stimulus
intensity
strength of stimulus
duration
span of time that stimulus is sensed
location
of the receptor upon or within the body, and/or the origin of the stimulus from outside the body
sensory receptor: sensory neuron
directly transduces the stimulus energy
gives rise to an axon that serves as the primary sensory afferent fiber from that receptor
sensory receptor: modified epithelial cell
receives the stimulus energy
accessory structures to a sensory receptor
enhance or focus a particular stimulus upon the receptor
sensory receptors transduce the “ “ into a coded ___________ for relay in the CNS
stimulus energy; bioelectrical signal
stimulus transduction starts with a
generator potential
generator potential
responsive depolarization of the sensory neuron’s membrane
the greater a stimulus intensity is…
the greater the membrane change is