Transmissions of Axons and Synapses

Question 1

Define Synaptic transmission

Answer 1

Integrating/processing of information

Question 2

Define Axonal transmission

Answer 2

Transmitting information from A to B

Question 3

What are the 5 fundamentals processes of neurotransmission?

Answer 3

1) Manufacture (Intracellular biochemical processes)
2) Storage (Vesicles)
3) Release (Action Potential)
4) Interaction with post-synaptic receptor
5) Inactivation

Question 4

What are examples of fast neurotransmitters(2) and how long do they last?

Answer 4

Ach, GABA,

Short lasting

Question 5

What are examples of neuromodulators(3) and how long do they last?

Answer 5

Dopamine, Serotonin, Noradrenaline

Long lasting

Question 6

Role of an Endorphin?

Answer 6

Peptide with opiate-like effects, inhibiting the release of substance P

Question 7

How long does the refractory period last?

And 2 main components

Answer 7

5-10ms

Absolute RP followed by the Relative RP

Question 8

What is the neuronal resting potential?

Answer 8

-70mV

Question 9

What is the relative refractory period?

Answer 9

Follows absolute RP, when a 2nd stimulus stronger than first needed to produce a successive AP

Question 10

How is the neuronal RP maintained?

Answer 10

3Na+ pumped out for every 2K+ in (SOPI)

(Requires ATP and lots of Na+/K+ pumps_