The sarcoplasmic reticulum wraps like a sleeve around the myofibril and stores and releases calcium.

Question

Quizplus · Accepted Answer

This is a true statement. The sarcoplasmic reticulum is a specialized type of endoplasmic reticulum that surrounds and interacts with myofibrils in muscle cells. It is responsible for storing and releasing calcium ions, which are important for muscle contraction. The sarcoplasmic reticulum forms a network of tubules and sacs that are in close proximity to the myofibrils, allowing for efficient calcium release during muscle activation.

The Sarcoplasmic Reticulum Wraps Like a Sleeve Around the Myofibril