Transmission Of A Nerve Impulse

Question 1

Action potential causes D____________n of axon terminal m_______ causing _______ voltage gated channels to open. _______ ions enter the s______c kn__.

Answer 1

Depolarisation
Membrane
Calcium
Calcium
Synaptic knob

Question 2

What is the synaptic knob?

Answer 2

The knob at the end of an axon terminal

Question 3

After entering the synaptic knob, calcium binds to synaptic v_______

Answer 3

Vesicles

Question 4

What is a synaptic vesicle?

Answer 4

A small sac inside the synaptic knob

Question 5

Vesicles bind to the pre-sy_____c membrane (membrane of the synaptic knob)
causing exocytosis of n____t___________ into the synapse

Answer 5

Presynaptic

Neurotransmitters

Question 6

What is a neurotransmitter?

Answer 6

A molecule that carries a nerve impulse across the synapse

Question 7

What is AChE and what does it stand for?

Answer 7

Neurotransmitter

Acetylcholine

Question 8

The neurotransmitter n__a_________ is released when the transmission is a________

Answer 8

Noradrenaline

Autonomic

Question 9

After exocytosis of Neurotransmitters, they diffuse across the synapse and bind to receptor-mediated proteins or s_____ l_____ c_______

Answer 9

Sodium ligand channels

Question 10

Sodium ligand channels allows NA2+ ions to do what? What does this cause?

Answer 10

To move from extracellular fluid into the dendrite

Causes depolarisation

Question 11

After transmission, neurotransmitters breakdown, what does AChE breakdown into?
How does the axon terminal reform AChE?

Answer 11

Acetyl + CoA + choline

Endocytosis of the above