Sensory Signalling Pathways

Question 1

Chemicals perceived in the olfactory system must be…?

Answer 1

Simple, volatile molecules

Question 2

What cells perceive odors and are connected to the olfactory neuron? How many are there?

Answer 2

12 sensory cilia

Question 3

What type of receptors are used in the olfactory system?

Answer 3

GPCRs

Question 4

In a rod cell which part of the cell is involved in general metabolism?

Answer 4

Inner segment

Question 5

In a rod cell, which part of the cell is involved in photodetection?

Answer 5

Outer segment

Question 6

What is the resting membrane potential for a rod cell?

Answer 6

-30 mV
(far less negative than a typical cell)

Question 7

What is special about a typical rod cell’s resting membrane potential?

Answer 7

It is depolarised

Question 8

What is glutamate?

Answer 8

Neurotransmitter that is reduced in response to light interacting with rhodopsin

Question 9

Name 4 second messengers that increase cytosolic Ca2+

Answer 9

Inositol triphosphate (IP3)
Cyclic ADP-ribose
Inositol hexakisphosphate
Sphingosine-1-phosphate