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Why do synaptic knobs contain many mitochondria?
mitochondria provide adenosine triphosphate (ATP) which in turn supplies the energy for synthesizing new neurotransmitter or transmitter substance.
Are synaptic vesicles located at the ends of dendrites and axons?
No. They are located at the ends of axons, but not the dendrites. Please refer to the related links below to see an illustration.
What is the space where the terminal branches of an axon are close to but not touching the ends of the dendrites of another neuron?
The Synaptic Gap
What is synaptic potential?
synaptic potential
The are sack-like structures found inside the synaptic knob containing chemicals?
synaptic vesicles
What is the term used to describe the rounded areas on the ends of the axon terminals?
axon terminals
What happens after nerve signal reaches a synaptic knob?
In general, action potentials that reach the synaptic knobs cause a neurotransmitter to be released into the synaptic cleft. The arrival of the action potential opens voltage-sensitive calcium channels in the presynaptic membrane.
What does the synaptic knobs of the presynaptic neuron contain synaptic vesicles loaded with?
To provide energy for the re-combination of Choline and ethanoic acid, to form Acetylcholine. Acetylcholine is used as a neurotransmitter, and gets broken down after its reached the sodium channels' receptors on the post-synaptic membrane by acetylcholinease.
What are the small swellings at the end of a neuron called?
synaptic knobs (or axon terminals<--more commonly used name)
What is the extensions on the distal end of a neuron called?
The distal end of a neuron is the axon, an extension that arises from the soma (cell body), and at the distal end of an axon there are extensions called telodendria. At the distal ends of telodendria are knoblike structures called synaptic end bulbs (sometimes called synaptic knobs). Synaptic end bulbs have synaptic vesicles inside them that contain neurotransmitters. Synaptic vesicles are released by exocytosis into the synaptic cleft for diffusion. I can't tell from the way your question is worded if you're asking about axons, telodenria or synaptic end bulbs because all of these structures are at the distal end of a neuron. Determine what the function of the "extensions" is and use whichever part of my answer applies.
What are axon terminal clusters at the ends of neuromuscular junctions called?
Synaptic end bulbs
Why do synaptic knobs contain many mitochondria?
mitochondria provide adenosine triphosphate (ATP) which in turn supplies the energy for synthesizing new neurotransmitter or transmitter substance.
Which is not an event that must occur in a normal cycle of synaptic transmission?
absorption of the neurotransmitter
How do neurotransmitters transmit signals across the synapse?
after impulse conductionby postsynaptic neurons is initiated, neurotransmitters activity is rapidly terminated. Either one or both of two mechanisms cause this. Some neurotransmitters molecules difuseout of the synaptic cleft back into synaptic knobs
Where does a synapse occur?
Synapses occur at synaptic cleft (or also called as "synaptic gap"). The location of "synaptic cleft" depends on the types of synapses:axo-dendritic synapse : between axons and dendritesaxo-somatic synapse : between axons and cell bodiesaxo-axonic synapse : between axons and axonsdendro-denritic syanpse : between dendrites and dendrites
Are synaptic vesicles located at the ends of dendrites and axons?
No. They are located at the ends of axons, but not the dendrites. Please refer to the related links below to see an illustration.
When the blank reaches the ends of the axon the neurotransmitter is released and diffuses to the muscle cell membrane?
Synaptic vesicle
