Chapter 3

Question 1

What Ion is more concentrated inside of the cell ?

Answer 1

Potassium

Question 2

What Ion is more concentrated outside of the cell ?

Answer 2

Sodium (Na+)

Question 3

The sodium potassium pump (pumps) out how many sodium ions

Answer 3

3

Question 4

The sodium potassium pump retrieve how many potassium ions

Answer 4

2

Question 5

Why is the sodium potassium pump said to be electro genic ?

Answer 5

Because it pumps out 3 positively charged sodium ions and takes in 2 potassium, this creates a polarity from inside and outside of the cell

Question 6

What Ions facilitates vesicles to release neurotransmitter from the presynaptic neurons ?

Answer 6

Ca2+ (or calcium)

Question 7

What Ions flow into postsynaptic neurons through ACh receptors ?

Answer 7

Na+ ions (or sodium)

Question 8

What are typical time courses of the postsynaptic potentials produced by ionotropic and metabotropic receptors

Answer 8

Iontropic: one to two miliseconds last 10s of miliseconds
Metabotropic: 100s miliseconds to minutes and lasts seconds