Structure of Synapses (AQA A-Level Biology): Quizzes
📚Quizzes
Practise the questions
10 questions from this quiz
ShowHide
Practise the questions
10 questions from this quiz
What is the approximate width of the synaptic cleft?
What is the approximate width of the synaptic cleft?
20-30 nanometres
What is the function of mitochondria in the synaptic knob?
What is the function of mitochondria in the synaptic knob?
Provide energy for synthesis and release
What does the smooth endoplasmic reticulum do in the presynaptic neurone?
What does the smooth endoplasmic reticulum do in the presynaptic neurone?
Manufactures neurotransmitters
How many protein subunits form sodium ion protein channels in the postsynaptic membrane?
How many protein subunits form sodium ion protein channels in the postsynaptic membrane?
Five
Why can signals only pass in one direction at synapses?
Why can signals only pass in one direction at synapses?
Only presynaptic has vesicles
What is spatial summation?
What is spatial summation?
Multiple neurones release simultaneously
What is temporal summation?
What is temporal summation?
Single neurone releases repeatedly
Which ions are involved in inhibitory synapse function?
Which ions are involved in inhibitory synapse function?
Chloride and potassium
What membrane potential occurs during hyperpolarisation at inhibitory synapses?
What membrane potential occurs during hyperpolarisation at inhibitory synapses?
Approximately
Which structures store neurotransmitters ready for release in the presynaptic neurone?
Which structures store neurotransmitters ready for release in the presynaptic neurone?
Synaptic vesicles