Neurone Taboo

Question 1

Describe resting potential without using the words:

Resting state
Ready
Action potential

Answer 1

The voltage (-65mv) across the membrane of an axon when it is not being stimulated

Question 2

Describe unidirectional without using the words:

Action potential
Direction

Answer 2

When information is transmitted in a single pathway

Question 3

Describe all-or-nothing without using the words:

Discrete
Impulse

Answer 3

A principle that states that a stimulus must reach a certain threshold value in order to generate an action potential

Question 4

Describe Schwann cell without using the words:

Myelin sheath
Wrap around
Insulate

Answer 4

Cells that wrap around the axon to protect the axon and prevents leakage of electrical impulses

Question 5

Describe potassium ion channel without using the words:

Transport
Sodium

Answer 5

A channel that allows facilitated diffusion of potassium ions out of the neurone, down their concentration gradient

Question 6

Describe membrane potential without using the words:

Difference
Charge
Negative / positive

Question 7

Describe depolarisation without using the words:

Action potential
Impulse
(No reference to graphs)

Answer 7

When the inside of the axon is less negative than the outside of a neurone in response to the transmission of a nerve signal

Question 8

Describe saltatory conduction without using the words:

Myelin sheath
Jump
Action potential

Answer 8

The propagation of a nerve impulse along a myelinated neurone in which a nerve impulse skips from home to mode, speeding up transmission

Question 9

Describe hyperpolarisation without using the words:

Action potential
Impulse
(No reference to graphs)

Answer 9

A decrease in the membrane potential of an axon, so that it is even more negative then the resting potential

Question 10

Describe sodium-potassium pump without using the words:

ATP / ATPase
Active transport

Answer 10

Carrier protein that uses metabolic energy to pump 3 sodium ions out of the axon for every 2 potassium ions that it pumps into the axon

Question 11

Describe repolarisation without using the words:

Action potential
Impulse
(No reference to graphs)

Answer 11

The re-establishment of he resting potential (-65mv)

Question 12

Describe Node of Ranvier without using the words:

Myelin sheath
Schwann cell

Answer 12

Gaps in a myelinated neurone at which depolarisation only occurs

Question 13

Describe refractory period without using the words:

Action potential
Impulse
(No reference to graphs)

Answer 13

The short period of time after an electrical signal where no further electrical signals can be sent

Question 14

Describe threshold without using the words:

Action potential
Impulse

Answer 14

A certain size of stimulus that is required to generate an electrical signal

Question 15

Describe active transport without using the words:

ATPase
Sodium potassium pump
Concentration gradient

Answer 15

The movement of a substance from a low concentration to high concentration using metabolic energy and a carrier protein

Question 16

Describe gated sodium ion channels without using the words:

Potassium
Transport
Action potential

Answer 16

Channels that opens when stimulus triggers an impulse which allows facilitated diffusion of sodium ions into the neurone, down their concentration gradient

Question 17

Describe myelin sheath without using the words:

Schwann
Node of Ranvier
Insulation

Answer 17

A lipid layer along the axon that does not allow charged ions to pass through it to increase the speed of nerve impulses

Question 18

Describe action potential without using the words:

Impulse
Message
Resting potential

Answer 18

Change in electrical charge across the membrane of an axon wen it is stimulated in response to the transmission of an electrical signal