Junction
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Junction (Medicine)
Junction (/ˈdʒʌŋkʃən/), in the field of medicine, refers to the point or area where two or more things are joined. The term is derived from the Latin word junctio, which means a joining or a meeting.
Types of Junctions
There are several types of junctions in the human body, including:
- Cell junction: A type of structure existing within the cell membrane that helps in the interaction and communication between cells.
- Neuromuscular junction: A synapse between a motor neuron and a muscle cell. This is where a motor neuron is able to transmit a signal to the muscle cell, causing muscle contraction.
- Gap junction: A specialized intercellular connection between a multitude of animal cell-types. It directly connects the cytoplasm of two cells, which allows various molecules and ions to pass freely between cells.
- Tight junction: A type of cell-cell junction that prevents the passage of molecules and ions through the space between cells.
Related Terms
- Synapse: The junction between two nerve cells, consisting of a minute gap across which impulses pass by diffusion of a neurotransmitter.
- Intercalated disc: A junctional structure between certain cardiac muscle cells.
- Desmosome: A structure by which two adjacent cells are attached, formed from protein plaques in the cell membranes linked by filaments.
See Also
External links
- Medical encyclopedia article on Junction
- Wikipedia's article - Junction
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