Nerve Tissue

Question 1

Rer and ribosomes

Answer 1

Protein synthesis (neurotransmitters)

Question 2

Nucleus

Answer 2

DNA to code for proteins

Question 3

Dendrites

Answer 3

Attaches to axon temrjns to receive impulse

Question 4

Cell body

Answer 4

Where majority of organelles are found

Question 5

Myelin Sheath

Answer 5

Electrical insulation so impulse can’t leave

Question 6

Swchann cells

Answer 6

Produce myosin to wrap around axon

Question 7

Node of ranvier

Answer 7

Gaps between myelin sheath where action potential occurs

Question 8

Axon

Answer 8

Longest part action potential

Question 9

Axon terminal

Answer 9

Where neuro transmitter sends an impale to next neurone

Question 10

Resting potential voltage

Answer 10

-70mv

Question 11

Resting potential description

Answer 11

Na 3 pumps out
K 2 pumps in
Active transport

Question 12

Depolarisation voltage

Answer 12

+40 mv

Question 13

Depolarisation description

Answer 13

Na channels open
Membrane more permeable and Na enters
Voltage gated na ions open (more)
Depolarisation

Question 14

Repoolarisation voltage

Answer 14

-70 (towards)

Question 15

Repolarisation description

Answer 15

Na channels close at 40mv
K+ voltage gates open
Membrane more permeable to K
K+ diffuses out of the cell

Question 16

Hypolarisatiom

Answer 16

Voltage K+ channels slowly close when at resting potential
Goes beyond resting potential

Question 17

Return to resting potential

Answer 17

Na k pump restores neurone to resting potential
Against conc gradient with ATP