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A synapse is the site of communication between a neuron and another cell. There are two types of synapses: chemical synapses and electrical synapses. In a chemical synapse, a chemical signal— a neurotransmitter—is released from the neuron and it binds to a receptor on the other cell.
At electrical synapses, unlike chemical synapses, there is a direct physical connection between the presynaptic neuron and the postsynaptic neuron. This connection takes the form of a channel called a gap junction, which allows current—ions—to flow directly from one cell into another.
The physical connection between neurons with electrical synapses is in the form of large pore structures, called connexons, at gap junctions between such neurons.
Jul 7, 2024 · Synapse, 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.
Jun 18, 2021 · What is a Synapse. Synapse is a junction with a minute gap that separates two neurons (nerve cells), the basic unit of the nervous system in the brain. They are also found between a neuron and a muscle cell or gland. An adult human brain roughly has 1,000 to 5,000 trillion synapses.
For sensory neurons, which do not have a cell body between the dendrites and the axon, the initial segment is directly adjacent to the dendritic endings. For all other neurons, the axon hillock is essentially the initial segment of the axon, and it is where summation takes place.
Electrical synapses are a physical connection between two neurons. Cell membrane proteins called connexons form gap junctions between the neurons.
Mar 27, 2023 · The places where neurons connect and communicate with each other are called synapses. Each neuron has anywhere between a few to hundreds of thousands of synaptic connections, and these connections can be with itself, neighboring neurons, or neurons in other regions of the brain.
Nov 30, 2022 · Signals are passed from one neuron to the next at junctions called synapses. In most circuits, a synapse includes the end of an axon, the dendrite of an adjacent neuron, and a space between the two called the synaptic cleft.
Nov 2, 2023 · The synapse is a specialized connection between cells that enables communication between neurons within the central nervous system (CNS) or between a neuron and an effector cell (such as another neuron, muscle cell, or gland cell) in the peripheral nervous system (PNS).
