How is the sarcoplasmic reticulum very similar to the endoplasmic reticulum?
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How is the sarcoplasmic reticulum very similar to the endoplasmic reticulum?
The sarcoplasmic reticulum (SR) is a membrane-bound structure found within muscle cells that is similar to the smooth endoplasmic reticulum in other cells. Therefore, it is vital that calcium ion levels are controlled tightly, and can be released into the cell when necessary and then removed from the cell.
What is the role of sarcoplasmic endoplasmic 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 difference between endoplasmic and reticulum?
Whereas, the Rough Endoplasmic Reticulum is bounded by the ribosomes and also stores proteins….Difference Between Smooth Endoplasmic Reticulum And Rough Endoplasmic Reticulum.
| Character | Smooth Endoplasmic Reticulum (SER) | Rough Endoplasmic Reticulum (RER) |
|---|---|---|
| Produces | It produces lipids and proteins. | It produces proteins. |
What is the functional difference between the endoplasmic reticulum and ribosomes?
The endoplasmic reticulum can either be smooth or rough, and in general its function is to produce proteins for the rest of the cell to function. The rough endoplasmic reticulum has on it ribosomes, which are small, round organelles whose function it is to make those proteins.
What is the relationship between muscles fascicles muscle fibers and myofibrils?
Fascicles are also surrounded by connective tissue (called the perimysium) and each fascicle is composed of numerous muscle fibers (or muscle cells). Muscle cells, ensheathed by endomysium, consist of many fibrils (or myofibrils), and these myofibrils are made up of long protein molecules called myofilaments.
How does the sarcoplasmic reticulum of a muscle cell differ from the endoplasmic reticulum of any other cell?
The SR is separate from the sarcolemma and T-tubules. Unlike the ER, which is primarily involved in protein synthesis, the SR lacks ribosomes (the machinery required to make proteins) and is primarily involved in controlling Ca2+ concentrations inside the cardiomyocyte.
Do all cells have a sarcoplasmic reticulum?
The sarcoplasmic reticulum (SR) is a specialized form of endoplasmic reticulum (ER) found in most cells, which forms a system of intracellular membranes.
What is the function of 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.
What is the difference between the ER and Golgi bodies?
Golgi bodies or Golgi apparatus are an arrangement of few fluid-filled dishes whereas ER is a network of tubules and vesicles. Furthermore, Golgi apparatus sorts, modifies, and delivers the components in a cell whereas ER is more of a structurally aiding organelle for metabolic activities.
What is the relationship between ribosomes and endoplasmic reticulum?
Essentially, the endoplasmic reticulum and ribosomes work together in order to synthesize proteins and have them transported to their final destination. The rough ER’s main function is to help form and store proteins, while the smooth ER store lipids, a type of fat.
What is the difference between cytosolic ribosomes and ribosomes on the rough endoplasmic reticulum?
Free ribosomes are present in the cytosol, the watery fluid inside the cell and are not attached to any other structure. Membrane-bound ribosomes are attached to a structure known as rough endoplasmic reticulum. Free and membrane-bound ribosomes produce different proteins.