Neuronal

Question 1

Describe the action of a Pacinian corpuscle 

Answer 1

A strong stimulus produce is a generator potential that exceeds a threshold value

Question 2

Difference in the structure of the neurons

Answer 2

A motor neuron has the cell body on one end and then rights coming out whereas the sensor neuron has a hanging cell body in the middle

Question 3

structure a how do we know it’s the first neuron in the pathway?

Answer 3

A is a synaptic cleft. Structure a has vesicle

Question 4

If if the potential inside the neuron becomes more positive than outside, this is

Answer 4

Depolarisation

Question 5

Explain spatial versus temporal summation

Answer 5

Tempura is one presynaptic neuron releasing multiple times, but spatial is multiple pre-synaptic neurons releasing at different synapse points like different location

Question 6

What is the all or nothing response?

Answer 6

If a threshold is met, then there will be a full action potential

Question 7

Spatial summation

Answer 7

Multiple neurones firing at same time combine their effects

Question 8

GABA

Answer 8

Opens cl ion channels in post synaptic membrane so causes hyper polarisation of the post synaptic membrane

Question 9

When describing components of reflex arc

Answer 9

Mention synapse

Question 10

Answer 10

Question 11

Where is axon and dendron on sensory neurone

Answer 11

Dendron is before cell body

Question 12

Mentioning myelin sheath

Answer 12

Increases speed of atp and saltatory conduction

Question 13

How immune system causes damage to nervous system

Answer 13

Antigens on neurones activate it and antibody against neurones are produced so phagocytes break neurone

Question 14

Why is transmission of action potential slower in absence of saltatory conduction

Answer 14

Whole axon needs to be depolarised no nodes of ranvier

Question 15

Answer 15

Question 16

Depolarisation of..

Answer 16

Membrane

Question 17

If no na can enter

Answer 17

No action potential no impulse conducted along axon so no release of neurotransmitter

Question 18

Graph

Answer 18

Resting at end

Question 19

Why does deformation of plasma membrane of the tip cause the membrane to become more permeable to NA

Answer 19

Causes more sodium ion channels to open and so has more gaps between phospholipids

Question 20

Similarities between sensory and motor neurone

Answer 20