AP

Question 1

Whats the membrane potential?

Answer 1

Voltage difference between the outside of a cell and inside.

Question 2

What are the 4 stages involved in an action potential?

Answer 2

Resting potential, depolarisation, re-polarisation and hyperpolarisation.

Question 3

What ions are involved at resting potential

Answer 3

calcium, potassium, chloride and protein

Question 4

What ions are involved at depolarisation?

Answer 4

Sodium and potassium

Question 5

What is diffusion?

Answer 5

Movement of ions and molecules from regions of high concentration to low.

Question 6

What is electrostatic pressure?

Answer 6

Electrically charged molecules move to areas that have molecules of the opposite charge. The opposite charges attract eachother and similar charges repel.

Question 7

Whats the resting potential charge?

Answer 7

-70 mV

Question 8

Depolarisation charge?

Answer 8

+40mV

Question 9

Hyperpolarisation charge?

Answer 9

-90mV

Question 10

Repolarisation charge?

Answer 10

-70mV

Question 12

Whats is the function of a neuron?

Answer 12

Detect information from the environment - allows us to move and act,

Question 13

How many neurons in the body?

Answer 13

Between 100 and 1000 billion

Question 14

What are the types of neurons?

Answer 14

Sensory - detect info of light, sound, taste etc.

Motor neurones - contol muscles/actions

Interneurones - relay and process info between other neurons.

Question 15

A

Answer 15

Dendrite

Question 16

B

Answer 16

Cell Body

Question 17

C

Answer 17

Node of Ranvier

Question 18

D

Answer 18

Axon Terminal

Question 19

E

Answer 19

Schwann Cell

Question 20

F

Answer 20

Myelin Sheath

Question 21

G

Answer 21

Axon

Question 22

H

Answer 22

Nucleus

Question 23

Name the synaptic cells

Answer 23

Presynaptic and postsynaptic