Comparing signal and smell Flashcards
1
Q
signal sensed
A
light (photoreception) vs chemical (chemoreception)
2
Q
GPCR involved
A
Rhodopsin and opsin (vision) vs odourant receptor (smell)
3
Q
G-protein involved
A
transduction vs Golf
4
Q
secondary messenger
A
cGMP levels decrease (vision) vs cAMP levels increase (smell)
5
Q
Messengers to brain
A
Message passed to Retinal Ganglion Neurons which form part of the optic nerve.
Optic nerve sends signal to visual cortex in the brain via thalamus
vs
Nerve cells signal directly to olfactory bulb. Signal then takes two paths, including a direct one to memory/emotional centres of the brain.
