Channels

Question 1

Channels are defined as

Answer 1

Structures that selectively allow the flux of ions into or out of the neuron

Question 2

Non-gated channels allow for…

Answer 2

The diffusion of small ions

Question 3

What are the 3 types of Gated-ion channels

Answer 3

1. ) Modality
2. ) Ligand
3. ) Voltage

Question 4

Define modality gated ion channels

Answer 4

Each receptor is sensory modality specific

—Open in response to a stimulus that is NOT a neurotransmiter or change in membrane potential

Question 5

Define Ligand gated ion channels

Answer 5

Open in response to a neurotransmitter binding to a receptor on a post synaptic membrane

Question 6

Define Voltage gated ion channels

Answer 6

Open to a response to a change in membrane potential, essentially a change in chemical potentials across a membrane

Question 7

Define ionotropic receptors

Answer 7

Transmembrane molecules that can open/close a channel to allow smaller particles to travel in and out of the cell

Question 8

Define metabotropic receptors

Answer 8

A receptor that does not open/close but instead activates G-protein that activiates a secondary messenger

Question 9

Ligand can bind to two different types of receptors, what are they?

Answer 9

1. ) ionotropic
2. ) metabotropic