AQA A LEVEL BIOLOGY: SYNAPSES Questions With Accurate
Answers
synaptic cleft - Accurate answers a gap that separates neurons
what do synapses transmit - Accurate answers neurotransmitters
where is the synaptic knob located - Accurate answers the end of the axon terminal of the
presynaptic neuron
what is the purpose of a synapse - Accurate answers to relay information in the form of
neurotransmitters in one neuron to another
presynaptic neurons contains many - Accurate answers organelles such as mitochondria and
endoplasmic reticulum for the synthesis of neurotransmitters
What stores neurotransmitters? - Accurate answers synaptic vesicles
why doesnt a action potential get triggered in the postsynaptic neuron - Accurate answers because
the concentration of neurotransmitters released by the presynaptic neuron doesn't exceed the
threshold value of the postsynaptic neuron
Transmission of a neurotransmitters 1 - Accurate answers action potential arrives at synoptic knob
and causes Ca2+ ion channels to open and diffuse inside (facilitated)
Transmission of neurotransmitters 2 - Accurate answers Vesicles to move towards the presynaptic
membrane and fuse -releasing acetylcholine into the synaptic cleft
Transmission of neurotransmitters 3 - Accurate answers Short distance=fast diffusion.
Neurotransmitter binds to receptors on the postsynaptic membrane(Na+ channels and opens them
causing Na+ ions to diffuse into postsynaptic neurone down concentration gradient)
Answers
synaptic cleft - Accurate answers a gap that separates neurons
what do synapses transmit - Accurate answers neurotransmitters
where is the synaptic knob located - Accurate answers the end of the axon terminal of the
presynaptic neuron
what is the purpose of a synapse - Accurate answers to relay information in the form of
neurotransmitters in one neuron to another
presynaptic neurons contains many - Accurate answers organelles such as mitochondria and
endoplasmic reticulum for the synthesis of neurotransmitters
What stores neurotransmitters? - Accurate answers synaptic vesicles
why doesnt a action potential get triggered in the postsynaptic neuron - Accurate answers because
the concentration of neurotransmitters released by the presynaptic neuron doesn't exceed the
threshold value of the postsynaptic neuron
Transmission of a neurotransmitters 1 - Accurate answers action potential arrives at synoptic knob
and causes Ca2+ ion channels to open and diffuse inside (facilitated)
Transmission of neurotransmitters 2 - Accurate answers Vesicles to move towards the presynaptic
membrane and fuse -releasing acetylcholine into the synaptic cleft
Transmission of neurotransmitters 3 - Accurate answers Short distance=fast diffusion.
Neurotransmitter binds to receptors on the postsynaptic membrane(Na+ channels and opens them
causing Na+ ions to diffuse into postsynaptic neurone down concentration gradient)
