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What event most directly triggers the release of calcium from the terminal cisternae?
Wiki User
∙ 11y ago
action potential propagating down the T tubule
Wiki User
∙ 11y ago
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What is stored in the terminal cisternae?
calcium
What is normally stored in terminal cisternae?
Calcium
Normally stored in the terminal cisternae?
Calcium
The part of the sarcoplasmic reticulum where calcium ions are stored called?
Terminal Cisternae
Where are the calcium ions stored in the muscle cells?
terminal cisternae of the sarcoplasmic reticulum
What stores calcium important in muscle contractions?
The Sarcoplasmic Reticulum stores calcium and releases it through the terminal cisternae into the tubule.
What is the difference between a dyad and triad in skeletal cardiac muscle?
In skeletal muscle, a triad is formed when a T-Tubule is flanked on either side by the calcium containing Terminal Cisternae of the Sarcoplasmic Reticulum, at the level of the Z-line. The intimate association of these three membranous sturctures (Terminal Cisternae---T-Tubule---Terminal Cisternae) for a Triad. This differs from a diad (or Dyad), in cardiac muscle where the T-Tubule is only intimately associated with ONE Terminal Cisternae.
In relaxed muscle fiber which structure stores calcium?
It is the Terminal Cisternae- Sac like regions of the sarcoplasmic reticulum that serve as specialized resevoirs of calcium ions
Is calcium a neurotransmitter?
No, calcium itself is not a neurotransmitter BUT it is highly important in the process of the action potential. The action potential triggers the influx of calcium at the end of the terminal bouton, causing the influx of Ca2+ into the cell and this triggers for the release of the neurotransmitter. :)
The enlarged perpendicular chambers of the sarcoplasmic reticulum that store calcium ions lies adjacent to the t tubule at the you band and the a band interface of the skeletal muscle sarcomere?
It is the terminal cisternae
What is the organelle that stores calcium in resting muscle cells?
The Sarcoplasmic Reticulum stores calcium and releases it through the terminal cisternae into the tubule.
A concept map demonstrating the events of neurotransmitter?
Action potential reaches the action terminal of a nerve cell. This triggers calcium gated ion channels in the axon terminal to open, calcium rushes in. This causes vesicles filled with neurotransmitter to fuse to the membrane and dump the neurotransmitter into the synaptic cleft by exocytosis.
