OLFACTION

Question 1

are the first-order neurons of the olfactory pathway

Answer 1

OLFACTORY RECEPTORS

Question 2

3 PRINCIPAL KINDS OF CELLS OF THE NASAL EPITHELIUM

Answer 2

• SUPPORTING CELLS
• OLFACTORY CELLS
• BASAL CELLS

Question 3

are columnar epithelial cells of the mucous
membrane lining the nose. They provide physical support, nourishment, and electrical
insulation for the olfactory receptor cells and help detoxify chemicals that come in
contact with the olfactory epithelium

Answer 3

• SUPPORTING CELLS (SUSTENTACULAR CELLS)

Question 4

bipolar neurons whose cell bodies lie in bet. the
supporting cells with dendrites reaching the mucosal surface

Answer 4

• OLFACTORY CELLS/BIPOLAR CELLS

Question 5

receptors (site of olfactory transduction). They react to odors & then stimulate the olfactory cells, thus initiating olfactory impulse

Answer 5

OLFACTORY HAIRS

Question 6

are stem cells located between the bases of the supporting cells. They continually
undergo cell division to produce new olfactory receptor cells, which live for only a
month or so before being replaced

Answer 6

BASAL CELLS

Question 7

produce mucus that is carried to the
surface of the epithelium by ducts

Answer 7

OLFACTORY (BOWMAN’S GLANDS)

Question 8

PHYSIOLOGY OF OLFACTION

Answer 8

a. Gaseous particles enter the nostrils
b. Substances are dissolved in the mucus & come in contact with the olfactory
cells
c. Substances are dissolved in the lipid covering & come in contact with
olfactory hairs
d. Generation of nerve impulses by way of receptor potential
e. Transmission of nerve impulses thru the olfactory nerve
f. Olfactory bulb
g. Olfactory tract
h. Olfactory area (temporal lobe) in the cerebral cortex