part 3

Question 1

Because ACh enables ion channels to open and propagate signals, the channels themselves are called __________.

Answer 1

ligand-gated ion channels

Question 2

nicotine in low doses is a _______

Answer 2

stimulant

Question 3

nicotine does what as a stimulant?

Answer 3

an agonist. enhancing the receptors response

Question 4

nicotine in high doses is a _______

Answer 4

deppresant

Question 5

nicotine does what as a depressant?

Answer 5

an antagonist. it blocks the receptors.

Question 6

What happens when ACh is not released or there is an impairment of synthesis

Answer 6

ACh concentration is reduced and Nerve transmission is impaired

Question 7

what are chemicals in the brain that promote the transmission of signals between nerve cells

Answer 7

Excitatory neurotransmitters

Question 8

Give examples of excitatory neurotransmitters

Answer 8

-Glu
-Asp
-Cys

Question 9

Are chemicals that reduce neurotransmission

Answer 9

Inhibitory neurotransmitters

Question 10

Give examples of inhibitory neurotransmitters

Answer 10

-Glu
-Taurine
-B-Alanine
-Y-Aminobutyric Acid

Question 11

How many subclasses of receptors does Glu have

Answer 11

five

Question 12

The gate of the Glu ion channel is closed by what ?

Answer 12

Mg2+ ion

Question 12

What type of ion channel is the NMDA receptor?

Answer 12

ligand-gated ion channel

Question 13

what is the best known receptor of glu

Answer 13

N-methyl-D-aspartate (NMDA) receptor.

Question 14

Glu is removed by _______, which is facilitated by __________

Answer 14

• Reuptake
• Transporter molecules