Smell

Question 1

olfactory epithelium

Answer 1

used to detect odorants, mucus layer on epithelium traps odorants, axons of neurons in epithelium go straight to olfactory bulb

Question 2

receptor cilia

Answer 2

terminated through diffusion, degradation, or cAMP feedback (stops G-protein signaling, leads to desensitization to smells in the evironment

Question 3

coding for odorants

Answer 3

~350 types of receptors, each ORN only expresses one type of receptor, each receptor activated by multiple odorants, ORN are scattered randomly, kind of population coding

Question 4

olfactory bulb and glomeruli

Answer 4

information from olfactory receptor cells in epithelium to to glomeruli in the olfactory bulb. information is sorted into specific glomeruli (ORNs with same receptor go to same glomerulus). Neighboring glomeruli detect similar chemical structures.

Question 5

lateral inhibition

Answer 5

inhibitory neurons exist between neighboring glomeruli that detect similarly structured odorants. If one glomeruli is very activated it inhibits the other one

Question 6

adult neurogenesis

Answer 6

neurons generated at surface of lateral ventricle and migrate to bulb. mostly interneurons are made.

Question 7

olfactory pathway

Answer 7