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Questions and Answers
What is the function of synaptic vesicles in chemical synapses?
What is the role of connexons in electrical synapses?
Where are neurotransmitters released in chemical synapses?
What is the function of gap junctions in electrical synapses?
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What is the membrane-bound structure that contains neurotransmitters in chemical synapses?
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What is the small gap between the presynaptic terminal and the postsynaptic membrane called?
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Study Notes
Synaptic Vesicles in Chemical Synapses
- Synaptic vesicles store neurotransmitters and protect them from degradation before release.
- Upon arrival of an action potential, these vesicles fuse with the presynaptic membrane, facilitating neurotransmitter release.
Connexons in Electrical Synapses
- Connexons are hexameric protein structures forming gap junctions, allowing for direct electrical communication between adjacent neurons.
- They enable rapid transmission of signals by allowing ions and small molecules to pass freely between cells.
Neurotransmitter Release in Chemical Synapses
- Neurotransmitters are released into the synaptic cleft, which is the small space between the presynaptic terminal and the postsynaptic membrane.
- This release triggers receptor activation on the postsynaptic membrane, leading to a neuronal response.
Gap Junctions in Electrical Synapses
- Gap junctions provide a low-resistance pathway for ionic currents, enabling synchronized activity between electrically coupled neurons.
- This allows for fast, bidirectional transmission of signals, contributing to rapid reflexes and coordinated functions.
Membrane-Bound Structure Containing Neurotransmitters
- The membrane-bound structure called synaptic vesicles contains the neurotransmitters at the presynaptic terminal.
- These vesicles release neurotransmitters upon stimulation, facilitating intercellular communication.
Small Gap Between Presynaptic and Postsynaptic Membrane
- The small gap is known as the synaptic cleft.
- It plays a crucial role in the process of neurotransmission, allowing chemical communication between neurons.
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Description
Learn about the differences between chemical and electrical transmissions at synapses, including the components and processes involved in chemical synapses.
