Question

Triads in the skeletal muscle consists of which of the following

• A. sarcoplasm, sarcoplasmic reticulum, calcium ions
• B. sarcoplasmic reticulum, terminal cisternae, sarcoplasm
• C. two terminal cisternae and a T-tubule.
• D. two T-tubules and one terminal cisternae

Answer 1

The correct option is C

two terminal cisternae and a T-tubule.

The T Tubule enters the cell and is in contact with the sarcoplasmic reticulum. Note here that the sarcoplasmic reticulum has a lot of stored calcium. where the T Tubule abuts the sarcoplasmic reticulum or SR to forms a sac like bulges called terminal cisternae one T tubule and 2 adjacent SR cisternae is known as a triad.