Components of chemical synapse

Question

can someone describe in detail the components of a chemical synapse between 2 neurons or a neuron and a muscle cell?

Answer 1

Chemical Synapse

Transmission is not jumping of action potential but a complex chemical process permitting grading and modulation (frequency change) of neural activity

Components of chemical synapse:

Presynaptic neuron - neuron sending the impulse

Axon of presynaptic neuron terminates on the soma or dendritic region of the postsynaptic neuron

Axon ends in terminal branches with synaptic k***s that contain many mitochondria and vesicles of a chemical neurotransmitter

Number of k***s per cell varies, (1-40,000)

Synaptic cleft - space between cells across which an impulse must be transmitted

No direct connection, about 20-50 nm space between presynaptic and postsynaptic

Postsynaptic neuron - neuron receiving impulse

Neurotransmitter produces the action potential

Divergence - axon divides into many terminal branches and projects to many postsynaptic neurons

Convergence - neuron may receive input from thousands of other neurons

Oscillating circuit - neuron provides positive feedback to presynaptic neurons, prolongs response to stimulus

Answer 2

mostly ECM (Extra cellular matrix) and enzyme.