16: Olfaction (Smell)

Olfactory hairs

Detect odor molecules.

Olfactory bulb

First processing center for smell.

Supporting cells

Support and nourish receptors.

Basal cells

Stem cells that replace olfactory receptors.

CN I Olfactory nerve

Carries smell information to the brain.

Lamina propria

Connective tissue beneath olfactory epithelium.

Cribriform plate

Openings where CN I passes through the ethmoid bone.

Mitral cells, tufted cells

Interneurons that relay smell signals.

Odorants

Airborne chemicals that stimulate smell receptors.

Olfactory glands

Produce mucus to dissolve odorants.

Bowman’s glands

What is another name for OLFACTORY GLANDS?

Simple columnar epithelium

What composes OLFACTORY EPITHELIUM?

Areolar connective tissue

What composes AREOLAR CONNECTIVE TISSUE?

Bipolar

What kind of NEURON is OLFACTORY RECEPTOR NEURON?

Interneurons

What kind of NEURON Aare MITRAL & TUFTED CELLS?

Stem cells

What kind of CELL are BASAL CELLS?

Special senses

Receptors are located in specialized organs in the head.

Smell, taste, touch, vision, hearing

What are your SPECIAL SENSES?

Chemoreceptor

What is the STIMULUS?