8.4

Question 1

What is the role of a synapse

Answer 1

To bridge the gap between two neurones, and start an action potential in the next one

Question 2

What is the role of calcium ions in a synapse

Answer 2

To allow neurotransmitters to be released into the synapse

Question 3

What is the function of acetylcholine in a synapse

Answer 3

Neurotransmitter that binds to receptors on post synaptic knob, opening sodium channels which begin a wave a depolarisation

Question 4

Describe the two types of summation

Answer 4

Temporal - single neuron delivers many signals
Spacial - multiple neurons delivering signals simultaneously

Question 5

Explain how a synapse allows unidirectional movement of information

Answer 5

Neurotransmitters only released from presynaptic neuron
Receptors only on post synaptic neuron

Question 6

Compare and contrast a synapse to a neuromuscular junction

Answer 6

Synapse:
Two neurons
Neurotransmitters
Neuromuscular junction:
Neuron and muscle
Only acetylcholine