Touch and taste perception

Question 1

What is the law of specific energies?

Answer 1

a sensory receptor will be responsive to only one type of stimulus

Question 2

What organ is the ultimate interpreter of all sensation?

Answer 2

brain

Question 3

Where in the brain is the somatosensory cortex located?

Answer 3

postcentral gyrus

Question 4

How are cutaneous receptors distributed throughout the skin?

Answer 4

they are not equally distributed but are clustered at different points

Question 5

What is the relationship between receptor number and sensory acuity?

Answer 5

more receptors= more sensation

Question 6

What is a receptive field?

Answer 6

area within which a sensory neuron detects a stimuli

Question 7

What is sensory adaptation?

Answer 7

responds initially strongly to stimuli and then stop responding when stimulus becomes constant

Question 8

What is referred pain?

Answer 8

due to damage in a visceral organ producing pain that os perceived at a difference location near the body surface

Question 9

What is a taste bud?

Answer 9

Specialized epithelial cells arranged in the form of a barrel shaped receptor, associated with sensory nerves

Question 10

What are the five categories of taste?

Answer 10

Bitter, salty, sweet, umami, sour

Question 11

What chemicals stimulate each of the taste cells for each of the 5 tastes?

Answer 11

Salty= Na+
Sour=H+
Sweet=glucose or sugar derivatives
Bitter=quinine
umami=glutamate