2. The first membrane layer
2.1 endoplasmic reticulum (ER) surrounding the nucleus. A
2.1.1 rough endoplasmic reticulum (RER) has served the island ribosome protein grain to be exported outside the cell. It is more common in cells that secrete digestive enzymes, such as pancreatic cells generated. Tired of cells lining the stomach The cells lining the intestinal peptide hormone secretion, such as pancreatic cells that make insulin. Or antibody secreting pituitary cells such as leukocytes
2.1.2 smooth endoplasmic reticulum (SER) served three ways
- fat, such as phospholipid, steroid was found in the liver (synthesis of cholesterol) testes, ovaries, adrenal glands, the outer layer (formation. steroid hormone)
- elimination of toxins such as alcohol, drugs, liver cells
- stimulate the muscle cells.
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