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The triads of a muscle fiber consist of?
Two terminal cisternae and a T-tubule
What is stored in the terminal cisternae?
calcium
Normally stored in the terminal cisternae?
Calcium
What is normally stored in terminal cisternae?
Calcium
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
Where are the cross bridges involved in muscle contraction?
in the terminal cisternae
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.
The skeletal muscle complex known as the triad consists of what?
one transverse tubule and two terminal cisternae
What is formed by a t tubule and two adjacent terminal cisternae?
Triad
What are the complex of a transverse tublue and two adjacent terminal cisternae is known as?
Triad
Where are the calcium ions stored in the muscle cells?
terminal cisternae of the sarcoplasmic reticulum
What does the terminal cisternae of the sarcoplasmic reticulum release?
The terminal cisternae release calcium ions into the muscle cell in response to an action potential. This calcium triggers muscle contraction by binding to troponin, which allows myosin to bind with actin and initiate the sliding filament mechanism.
