chapter 12 action potentials

Question 1

what is the difference between the neuron and nerve?

Answer 1

neuron single nerve cell
nerve bundles of neurons

Question 2

what are the parts of the neuron ?

Answer 2

Question 4

Answer 4

Question 5

what does the cell body do?

Answer 5

houses nucleus and organelles

Question 6

what do the dendrites do?

Answer 6

increases surface area for receiving signals
- sends their input to the axon or the axon hillock

Question 7

Answer 7

Question 8

Answer 8

dyneins picking up garbage in terminals and recycle and bring back towards cell body

kinesins move away from the cell body

Question 9

what is the membrane potential?

Answer 9

inside of the cell membrane is more negative
because we are pumping out 3 sodium and gaining two potassium the inside is more negative, the outside is more positive

Question 10

Answer 10

Question 11

what is the resting membrane potential in nerves?

Answer 11

-70

inside more negative than outside at rest

Question 12

Answer 12

Question 13

what does this image mean

Answer 13

The concentration gradient wants potassium to move outside but the electrical gradient wants it to stay inside
- counter each other
- concentration gradient wins

• at rest there is going to be a bigger pull for sodium to move in than potassium to move out