Pharmacology

Question 1

What is depolarisation?

Answer 1

The membrane potential becomes less negative

Question 2

What is hyperpolarisation?

Answer 2

The membrane potential becomes more negative

Question 3

The direction of the charge in potential is dependent on what?

Answer 3

• the direction of the movement of the ion (influx and efflux)
• the charge carried by the ions ( +ve or -ve)

Question 4

What are action potentials?

Answer 4

Brief electrical signals in which the polarity of the nerve cell membrane is momentarily reversed