Touch & Smell

Question 1

what are the five touch receptors and what do they respond to?

Answer 1

1️⃣Pacinian corpuscles: Respond to deep pressure and vibration
2️⃣Meissner corpuscles: Respond to light touch
3️⃣Merkel cells (discs): Respond to deep pressure and texture
4️⃣Ruffini endings: Respond to stretch
5️⃣Free nerve endings: Respond to pain and temperature

Question 2

two-point threshold

Answer 2

Minimum distance that should be there to distinguish two different points

Question 3

What is the two point threshold dependent on?

Answer 3

it is dependent on the
density of the nerves and the
area of the skin being tested

Question 4

Physiological 0

Answer 4

normal temperature of the skin

Question 5

gate theory of pain

Answer 5

Special mechanism that controls pain signals and affects if we feel pain or not

Question 6

noccireceptors

Answer 6

pain receptors

Question 7

Meissner’s corpuscles

Answer 7

nerve endings in the skin that are sensitive to light touch and low frequency vibrations

Question 8

pheromones

Answer 8

molecules that can be sent

Question 9

Why can’t human sense pheromones, which are sensed by animals?

Answer 9

Humans don’t have accessory olfactory epithelium or accessory olfactory bulb

Question 10

cribiform plate

Answer 10

Bone that separates the brain and the olfactory epithelium

Question 11

olfactory bulb

Answer 11

Bundle of nerves in the brain closer to the bottom

Question 12

glomerulus

Answer 12

A designation point where various sensory olfactory cells come together that are sensitive to the same molecule

Question 13

mitral/tufted cell

Answer 13

One signups coming out of the glomerulus which goes to the olfactory bulb

Question 14

what type of cells are the sensory olfactory cells?

Answer 14

G-protein coupled receptor cells

Question 15

What happens when the molecule(smell) is binding to the GPCR cell?

Answer 15

g protein opens the gate (ion channel) for positive ions to enter the cell