Synapse and its Types

Synapse, also called neuronal junction, the site of transmission of electric nerve impulses between two nerve cells (neurons) or between a neuron and a gland or muscle cell (effector). A synaptic connection between a neuron and a muscle cell is called a neuromuscular junction.
At a chemical synapse each ending, or terminal, of a nerve fibre (presynaptic fibre) swells to form a knoblike structure that is separated from the fibre of an adjacent neuron, called a postsynaptic fibre, by a microscopic space called the synaptic cleft. The typical synaptic cleft is about 0.02 micron wide. The arrival of a nerve impulse at the presynaptic terminals causes the movement toward the presynaptic membrane of membrane-bound sacs, or synaptic vesicles, which fuse with the membrane and release a chemical substance called a neurotransmitter. This substance transmits the nerve impulse to the postsynaptic fibre by diffusing across the synaptic cleft and binding to receptor molecules on the postsynaptic membrane. The chemical binding action alters the shape of the receptors, initiating a series of reactions that open channel-shaped protein molecules. Electrically charged ions then flow through the channels into or out of the neuron. This sudden shift of electric charge across the postsynaptic membrane changes the electric polarization of the membrane, producing the postsynaptic potential, or PSP. If the net flow of positively charged ions into the cell is large enough, then the PSP is excitatory; that is, it can lead to the generation of a new nerve impulse, called an action potential.
#ElectricalSynapse
#ChemicalSynapse

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Sir how calcium ions managed to enter the knob though there is a high concentration of positive ions inside the knob.

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Sir synaptic cleft of electrical synapse is??? According to google 1.2 to 2 nm.

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Sir can we know when neuron work as chemical synapse and when electrical

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if they are attached then it's electrical otherwise its chemical

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??

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Sir how calcium ions managed to enter the knob though there is a high concentration of positive ions inside the knob

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By active transport

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