resting potential

Question 1

What is the structure of the mylieniated motor nueorn?

Answer 1

= cell body
= dendrites
= axon
= schwaan cells

Question 2

What does the cell body do?

Answer 2

= contains general features of animal cells
= proteins and neurotransmitters are found here

Question 3

What do dendrites do?

Answer 3

= carry action potentials, to surrounding cells

Question 4

What is the axon?

Answer 4

= conductive, long fibre, carries nerve impulses along the motor nueron

Question 5

What are shwaan cells?

Answer 5

= wrap around axon
to form myleian sheath- lipid and does not allow charged particles to pass through
= there are gaps between the mylien sheathes, these are the nodes of ranvier

Question 6

What is the resting potential?

Answer 6

= when a neurone is not conducting an impulse there is a difference between the electrical charge inside and outside the the nueron this is known as resting potential
= there are more positive na+ ions and K+ outside compard to the inside, therefore isnide has a negative chage this is at -70mv

Question 7

How is a resting potential established?

Answer 7

= sodium pottasium pump- involves active transpoert and therefore ATP
= pump moves 2K+ ions in and 3Na+ ions out
= creates an electrochemical gradient and results to K+ ions diffusing back out, and na+ diffusing in, but as the membrane is more permeale to K+ ions, more are moved out