Sense of Smell (Olfactory)

Question 1

Olfactory system processes information about the ________, _______________, and _________ of a wide range of odorants

Answer 1

Identity, concentration, and quality

Question 2

Olfactory Epithelium

Answer 2

Roof of nasal cavity

Question 3

Olfactory receptor neurons (ORNs)

Answer 3

Sensory, smell receptor cells

Question 4

What does the Bowmans Gland produce?

Answer 4

Mucus in the nose

Question 5

Are ORNs ciliated or nonciliated

Answer 5

ciliated

Question 6

Can ORNs send action potentials?

Answer 6

Yes

Question 7

What do supporting cells do?

Answer 7

detoxify any possible chemicals

Question 8

ORNs are able to constantly _________ when damaged

Answer 8

replenish

Question 9

Process of olfactory signaling (6 steps)

Answer 9

1. Odorant molecules bind to ORNS
2. Binding activates the metabotropic g-protein called GOLF
3. GOLF increased cAMP
4. Increased cAMP opens cation channels
5. Open cation channels depolarize the cell
6. Action potential is sent from axon hillick

Question 10

How many different receptor types are there?

Answer 10

350

Question 11

Smells are usually made up of a _______________________

Answer 11

combination of odorants

Question 12

The AC turns ATP into __________, which activates

Answer 12

cAMP; the cation gated channel

Question 13

Does Cl- leave the cell or enter the cell in ORNs? What activates this channel?

Answer 13

Cl- leaves; Ca2+ activates

Question 14

What is let in through the cation gated channels?

Answer 14

Ca2+ and Na+

Question 15

Where is the olfactory bulb?

Answer 15

The forebrain

Question 16

Olfactory nerve axons synapse with __________

Answer 16

mitral cells

Question 17

The collection of synaptic collections from the olfactory nerve axons and the mitral cells are called

Answer 17

glomerulus

Question 18

A collection of glomerulus is called __________

Answer 18

glomeruli

Question 19

Each chemical in an odor excites different _________

Answer 19

glomeruli

Question 20

Different combination of different glomeruli leads to ___________________________

Answer 20

Different smell perception

Question 21

What conducts signals from mitral cells to the brain?

Answer 21

The olfactory tract

Question 22

Signals sent to base of frontal or temporal lobes is used for

Answer 22

odor identification

Question 23

Signals sent to the limbic system (amygdala) are used for

Answer 23

detection of smoke, burning, skunk smell
(anything that triggers fight or flight)

Question 24

Signals sent to the hypothalamus are used for

Answer 24

Appetizing food- activates salvation
Produces peptides for digestion

Question 25

Signals sent to hippocampus are used for

Answer 25

episodic memories

Question 26

Is the sense of olfaction in some areas or wide-spread?

Answer 26

Very widespread