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What else can I help you with?
Is the rough endoplasmic reticulum covered with ribosomes?
No, the name Rough Endoplasmic Reticulum comes from the 'rough' appearance when seen under an electron microscope. The 'rough' bits are ribosomes which stud the surface. Smooth Endoplasmic Reticulum has no 'rough' bits ie. no ribosomes.
Can you explain the role of the endoplasmic reticulum in protein synthesis?
The endoplasmic reticulum is a cell organelle that plays a crucial role in protein synthesis. It is responsible for folding and modifying newly synthesized proteins before they are transported to their final destinations within or outside the cell. The endoplasmic reticulum also helps in quality control by ensuring that only properly folded proteins are released from the organelle.
Where are Ca2 plus ions stored?
Calcium ions are stored in the endoplasmic reticulum of cells, as well as in specialized organelles called the sarcoplasmic reticulum in muscle cells. When needed, these ions can be released into the cytoplasm to carry out various cellular functions.
Which sequence correctly traces the path of path of a protein in the cell?
The correct sequence is: 1. Protein synthesis in the ribosomes of the cytoplasm or rough endoplasmic reticulum (ER), 2. Transport through the Golgi apparatus for processing and sorting, 3. Packaging into vesicles for delivery to its final destination such as secretion outside the cell, incorporation into the cell membrane, or localization within specific organelles.
What substance is released into the sacroplasm reticulum causing muscle relaxation?
calcium ion
Why is the endoplasmic reticulum important in the production of insulin?
Endoplasmic reticulum (ER) or more specific rough endoplasmic reticulum is important due to the presence of ribosomes on the surface of ER. The protein synthesis takes place in the ribosomes but once its "completed" it moves within the interior of the ER. Now ER is important because although the protein synthesis is done still some modifications is required to activate it. A portion of modification is done inside the ER where proteins ( eg. Insulin) are a step closer for activation. hope this helps :)
Why do some cells of the human pancreas have up to 100 times the amount of endoplasmic reticulum as other parts of the body?
The pancreas secretes the hormones insulin, glucagon, and somatastatin, and the digestive enzymes, lipase, protease, and amylase. Proteins that will be secreted by the cell are produced by the ribosomes on the rough endoplasmic reticulum. Therefore, cells that secrete proteins have a large amount of rough endoplasmic reticulum.
What substances are produced at the surface of the Endoplasmic Reticulum of a cell?
Pepsin is produced by cells lining the stomach and released into the stomach cavity. Insulin is made by pancreatic cells & released into the bloodstream.
Why endoplasmic reticulum so important to the cell?
There are tow types of Endoplasmic Reticulum (ER): Smooth ER and Rough ERSmooth ER - Breaks down carbohydrates; synthesis of lipids, phospholipids, steroids; helps to detoxify blood; stores Calcium ionsRough ER - Helps with protein synthesis; has ribosomesit acts as an intracellular highway through the cell. it carries and sends materials throughThe rough ER makes proteins, which are then sent to the Golgi bodies to be refined and released into the cell in secretory vesicles.the endoplasmic reticulum(otherwise known as ER) transports nutrients and fluid around the cell in most living mammals.Endoplasmic reticulum in a cell transports proteins made from the ribosomes around the cell. It can also be smooth or rough, having no ribosomes being smooth and having ribosomes being rough.
What happens to proteins with in the endoplasmic reticulum?
Newly made proteins are either released into the cytoplasm or transported into the rough endoplasmic reticulum. Those released into the cytoplasm may make their way into the nucleus if they have the nuclear localisation signal. Proteins that contain an N terminal signal sequence in their amino acid sequence will be transported into the rough endoplasmic reticulum or the RER membrane, where they will undergo further processing (mainly glycosylation) before vesicular transport to an organelle or the cell membrane.
Is the endoplasmic reticulum an organelle?
Yes, the rough endoplasmic reticulum produces secretory proteins also known as enzymes. Secretory proteins means that these proteins are made for secretion or delivery outside the cell and into the body.
What is the organelle that stores calcium in resting muscle cells?
The organelle that stores calcium in resting muscle cells is the sarcoplasmic reticulum. Calcium ions are released from the sarcoplasmic reticulum during muscle contraction to trigger muscle activity.
