AQA A Level Biology: Synapses Actual Test Exam With Complete Solutions 2024.

synaptic cleft Answer a gap that separates neurons what do synapses transmit Answer neurotransmitters where is the synaptic knob located Answer the end of the axon terminal of the presynaptic neuron what is the purpose of a synapse Answer to relay information in the form of neurotransmitters in one neuron to another presynaptic neurons contains many Answer organelles such as mitochondria and endoplasmic reticulum for the synthesis of neurotransmitters What stores neurotransmitters? Answer synaptic vesicles why doesnt a action potential get triggered in the postsynaptic neuron Answer 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 Answer action potential arrives at synoptic knob and causes Ca2+ ion channels to open and diffuse inside (facilitated) Transmission of neurotransmitters 2 Answer Vesicles to move towards the presynaptic membrane and fuse -releasing acetylcholine into the synaptic cleft