Sensation And Chemical Senses 3.6

Question 1

Modality

Answer 1

Type of stimulus

Question 2

Thermo…

Answer 2

Temp on skin

Question 3

Photo…

Answer 3

Light in retinas

Question 4

Nociceptors

Answer 4

Pain, tissue damage

Question 5

Chemo…

Answer 5

Smell, taste based on chemicals

Question 6

Mechano

Answer 6

Cell membrane distortion, balance, touch, hearing

Question 7

Osmo

Answer 7

Change in conc. Of ECF

Question 8

General

Answer 8

Free nerve endings

Question 9

Hair movement

Answer 9

Root hair plexuses

Question 10

Light touch (epidermis)

Answer 10

Tactile (merkel’s) discs

Question 11

Light touch (dermis)

Answer 11

Tactile (meissner’s) corpuscles

Question 12

Deep pressure

Answer 12

Lamellated (pacinian) corpuscles

Question 13

Skin distortion

Answer 13

Bulbous (Ruffini) corpuscles

Question 14

Taste buds

Answer 14

Epithelium + taste receptors

Question 15

First order neuron

Answer 15

Sensory location -> spinal cord (gray horns)

Question 16

Second order neuron

Answer 16

Gray horn -> thalamus (after crossing over)

Question 17

Third order neuron

Answer 17

Thalamus-> sensory cortex
CNS neuron -> CNS interneuron 
Cross over (left sensory to right hemisphere)

Question 18

Receptor potential

Answer 18

Graded depolarization (or hyperpolarization) by stimulus

Question 19

Physic receptors

Answer 19

Adapt to a stimulus

Ex. Thermoreceptors and hot tubbing