Olfaction

Question 0

What are the SEVEN (7) CLASSES a of ORDOR?

Answer 0

1. ) Camphorous
2. ) Musky
3. ) Floral
4. ) Pepperminty
5. ) Ether-Like
6. ) Pungent
7. ) Putrid

Question 1

What TWO (2) CONDITIONS must be met for a substance to be SMELLABLE?

Answer 1

1. ) Must be VOLATILE or VAPOROUS at ORDINARY TEMPERATURES.

2. ) Must be SOLUBLE in FAT or WATER solvents.

Question 2

Give an example of a CAMPHOROUS ODOR.

Answer 2

Mothballs

Question 3

Give an example of a MUSKY ODOR.

Answer 3

Heavy Oil

Question 4

Give an example of a FLORAL ODOR.

Answer 4

Roses

Question 5

Give an example of a PEPPERMINTY ODOR.

Answer 5

Peppermint

Question 6

Give an example of an ETHER-LIKE ODOR.

Answer 6

Dry Cleaning Fluid

Question 7

Give an example of a PUNGENT ODOR.

Answer 7

Vinegar

Question 8

Give an example of a PUTRID ODOR.

Answer 8

Rotten Eggs

Question 9

True or False: olfactory sense is more sensitive than taste.

Answer 9

TRUE,

OLFACTION is MORE SENSITIVE than taste

Question 10

What are the TWO (2) CELL TYPES that make up the OLFACTORY EPITHELIUM?

Answer 10

Columnar Cells
Olfactory Cells

• see illustration*
• see HANDOUT*

Question 11

At the BASE of the OLFACTORY CELLS, FIBERS group themselves in small bundles that PASS THROUGH OPENINGS in the ______________ of the ____________.

Answer 11

Cribform Plate

Ethmoid Bone

Question 12

The ETHMOID BONE is found at the _____________ between ___________ at the ROOF OF THE NOSE.

Answer 12

Anterior BASE of CRANIUM

2 ORBITS

Question 13

OLFACTORY FIBERS enter into the ____________.

Answer 13

Olfactory Bulb

see HANDOUT

Question 14

OLFACTORY FIBERS end together in a SYNAPSE with ____________ neurons, the SYNAPTIC AREA is called a ___________.

Answer 14

SECOND-ORDER

GLOMERULUS

Question 15

Cells who’s DENDRITES synapse with FIRST-ORDER NEURONS in the GLOMERULUS are either __________ or _________ CELLS.

Answer 15

Mitral

Tufted

Question 16

AXONS of MITRAL and TUFTED CELLS form the _______________.

Answer 16

Olfactory Tract

Question 17

AXONS of MITRAL CELLS form the ________________.

Answer 17

Lateral Olfactory Stria (LOS)

Question 18

AXONS of the TUFTED CELLS form the ______________.

Answer 18

Medial Olfactory Stria (MOS)

Question 19

The LATERAL OLFACTORY STRIA goes ACROSS the ____________ SURFACE of the ____________ LOBE and terminates in the ____________ LOBE and the ___________.

Answer 19

Ventral
Frontal
Temporal
Amygdala

Question 20

The _____________ is the MAJOR sensory PATHWAY for SMELL.

Answer 20

Pyriform Cortex

Question 21

BEFORE MITRAL cells FORM the LATERAL OLFACTORY STRIA, they send a number of recurrent COLLATERALS that CONNECT with ____________ cells.

Answer 21

Granule Cells

Question 22

What are TWO (2) possible FUNCTIONS of GRANULE CELLS?

Answer 22

1. ) Makes REPEATED FIRING of MITRAL and TUFTED cells possible.
2. ) GRANULE cells INHIBIT succeeding IMPULSES from mitral and tufted cells.
   * Fig.7.19 p.180*

Question 23

This is known as SMELL BLINDNESS.

Answer 23

Anosmia

Question 24

This is DISTORTION of the sense of SMELL.

Answer 24

Parosmia