3. Brain to neuron

Question 1

What do ventricles contain? (Neurons psychobiology)

Answer 1

cerebrospinal fluid

Question 2

What does cerebrospinal fluid do? (Neurons psychobiology)

Answer 2

bathes and cushions the brain

Question 3

What is blood supply to the brain needed for? (Neurons psychobiology)

Answer 3

energy

Question 4

What are connections between the brain areas known as? (Neurons psychobiology)

Answer 4

White matter tracts

Question 5

How do cells work? (Neurons psychobiology)

Answer 5

Expressing different proteins

Question 6

What are proteins made up of? (Neurons psychobiology)

Answer 6

Chains of amino acids, coded for by DNA

Question 7

What are gila thought to do? (Neurons psychobiology)

Answer 7

‘Stick’ the brain together

Question 8

Why are gila important? (Neurons psychobiology)

Answer 8

They have signalling controls and are important in structural support

Question 9

What two ways can neurons transmit information? (Neurons psychobiology)

Answer 9

Within a neuron or between a neuron

Question 10

How is information communicated within a neuron?

Answer 10

Electrical transmission (action potentials and synaptic potentials)

Question 11

How is information communicated between neutrons? (Neurons psychobiology)

Answer 11

Chemical transmission (at synapses)

Question 12

What are electrical currents? (Neurons psychobiology)

Answer 12

Flows of charged particles

Question 13

What is voltage? (Neurons psychobiology)

Answer 13

a measure of how much potential there is for charge to move

Question 14

What are the two equations for current? (Neurons psychobiology)

Answer 14

Current = potential x conductance

Current = potential / resistance

Question 15

What is Ohm’s law of electricity? (Neurons psychobiology)

Answer 15

The amount of current that flows is dependent on how much potential there is and how easy it is to flow through the circuit

Question 16

What did Hermann Von Helmholtz measure and how? (Neurons psychobiology)

Answer 16

Measured the speed of a nerve by stimulating a frogs sciatic nerve and measuring the time taken to constrict the muscle

Question 17

What did Hermann Von Helmholtz find? (Neurons psychobiology)

Answer 17

the further away the stimulator, the slower the constriction response

Question 18

How do currents flow down nerves? (Neurons psychobiology)

Answer 18

as a wave of movement

Question 19

Where does voltage change propagate? (Neurons psychobiology)

Answer 19

Along the axon

Question 20

What are ions? (Neurons psychobiology)

Answer 20

Electrically charged particles

Question 21

What ions are found outside the cell? (Neurons psychobiology)

Answer 21

Sodium
Calcium
Chloride

Question 22

What ions are found inside the cell? (Neurons psychobiology)

Answer 22

Proteins

Potassium

Question 23

What do channels inside the membrane do? (Neurons psychobiology)

Answer 23

Allow specific ions through

Question 24

What is the equilibrium potential a combination of? (Neurons psychobiology)

Answer 24

Concentration and electrical gradients

Question 25

What is the electrochemical gradient? (Neurons psychobiology)

Answer 25

Combination of concentration and electrical gradient

Question 26

What is the equilibrium potential? (Neurons psychobiology)

Answer 26

Potential across membrane at which there is no net flow of an ion

Question 27

What is the Nernst equation? (Neurons psychobiology)

Answer 27

The equilibrium potential dictated by concentration difference and ion charge