Neurology Week 2 Basic Questions Flashcards Preview

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Flashcards in Neurology Week 2 Basic Questions Deck (14)
1

Which are the most numerous cells in the nervous system?

Astrocytes

2

Opening of which channel causes the upstroke of the action potential? Which way is the flow?

Sodium flows inwards causing depolarization

3

Opening of which channel causes the downstroke of the action potential? Which way is the flow?

Pottassium flows outwards causing hyperpolarization

4

Are depolarizing responses excitatory or inhibitory?

Excitatory

5

Are hyperpolarizing responses excitatory or inhibitory?

Inhibitory

6

What kind of substances are glutamate, GABA and Glycine?

Amino Acids

7

What kind of substances are Acteylcholine, Dopamine, Histamine, Noradrenaline and Serotonin?

Amines

8

Which mediates fast transmisson; Ionotropic ligand gated ion channels or G protein coupled receptors?

Ionotropic ligand gated ion channels

9

What channel does the GABAa receptor operate?

Chlorine (Then a pottassium channel)

10

How do Benzodiazepines work?

Positive modulator of GABAa so enhance calcium entry and enhance inhibition

11

How does Baclofen work?

Agonist of the GABAb receptor and enhances the pottassium current, increasing inhibition

12

What is meant by an excitatory neurone?

A neurone that releases a depolarizing neurotransmitter

13

What is meant by an inhibitory neurone?

A neurone that releases a hyperpolarizing neurotransmitter

14

What is a quanta?

The release of neurotransmitter from a single vesicle