What is the sarcoplasm?

Sarcoplasm: it is the cytoplasm (material or protoplasm within a living cell, excluding the nucleus) of striated muscle cells.

Is the sarcoplasm the sarcoplasmic reticulum?

Sarcoplasmic Organelles Notably lacking from the core of sarcoplasm in myotubes are transverse tubules and sarcoplasmic reticulum (SR) (i.e., endoplasmic reticulum), including their dyads and triads that are so common in the intermyofibrillar sarcoplasm of maturer myocytes.

What is the function of the sarcoplasmic reticulum quizlet?

The major function of the sarcoplasmic reticulum is to sequester phosphate ions for the production of ATP. A motor unit is considered to be a nerve fiber and all the muscle fibers it innervates.

Is the sarcoplasm a membrane?

The sarcoplasmic reticulum (SR) is a membrane-bound structure found within muscle cells that is similar to the smooth endoplasmic reticulum in other cells.

What is sarcoplasm and sarcolemma?

The lining over muscle fibre is called sarcolemma. The protoplasm in the muscle fibre is called sarcoplasm. The endoplasmic reticulum in muscle fibre is called sarcoplasmic reticulum.

What is the sarcolemma and sarcoplasm?

The plasma membrane of muscle fibers is called the sarcolemma (from the Greek sarco, which means “flesh”) and the cytoplasm is referred to as sarcoplasm (Figure 10.2.

What is the major function of sarcoplasm?

The sarcoplasm plays a critical role in muscle contraction as an increase in Ca2+ concentration in the sarcoplasm begins the process of filament sliding. A decrease in Ca2+ in the sarcoplasm subsequently ceases filament sliding. The sarcoplasm also aids in pH and ion balance within muscle cells.

What is the main function of the sarcoplasmic reticulum?

The sarcoplasmic reticulum (SR) constitutes the main intracellular calcium store in striated muscle and plays an important role in the regulation of excitation-contraction-coupling (ECC) and of intracellular calcium concentrations during contraction and relaxation.

What is the function of the sarcoplasmic reticulum *?

By regulating the concentration of calcium in the sarcoplasm (the cytoplasm of striated muscle cells), the sarcoplasmic reticulum plays an important role in determining whether muscle contraction occurs.

What is sarcoplasm made of?

Sarcoplasm is the cytoplasm of a muscle fibre. It is a water solution containing ATP and phosphagens, as well as the enzymes and intermediate and product molecules involved in many metabolic reactions. The most abundant metal in the sarcoplasm is potassium.

What is sarcolemma sarcoplasm?