143 Intro to Sensory

Question 1

the generator potential is a ______ _____ excitatory current

Answer 1

local, graded

Question 2

the sensory systems transmits

Answer 2

intensity, modality, location, timing of stimulus

Question 3

the four mechanisms of receptor potential are

Answer 3

mechanical deformation of membrane, chemically-gated channel, temperature-based alteration of membrane permeability, electromagnetic radiation

Question 4

how does menthol cause cold sensation

Answer 4

activates TRPM8 leading to inward rush of Na and Ca

Question 5

what type of receptors are slow or non-adaptive

Answer 5

tonic receptors

Question 6

what type of receptors are fast adapting, example:tactile

Answer 6

phasic receptor

Question 7

most pacinian and ruffini sensory nerves are

Answer 7

beta

Question 8

most free nerve endings are

Answer 8

delta

Question 9

extensive convergence makes ______ difficult

Answer 9

localization

Question 10

free nerve fibers feel

Answer 10

touch and light touch

Question 11

meissner feel

Answer 11

touch and low frequency vibration

Question 12

pacinans feel

Answer 12

tissue vibration

Question 13

ruffini”s feel

Answer 13

heavy prolonged touch and pressure

Question 14

what is the somatosensory pathwat

Answer 14

dorsal column medial lemniscus

Question 15

lateral inhibition occurs at every _____ _____ in dorsal column

Answer 15

synaptic level

Question 16

what does the anterolateral pathway transmit

Answer 16

pain, thermal, crude touch, tickle, itch, sexual sensation