from the cell in which they are present. Smooth Endoplasmic Reticulum The SER is a network of phospholipid membranes than form intricate tubular channels and sacs that branch across the cell. The SER is a storage organelle and is involved with the synthesis of lipids and steroids‚ the metabolism of sterols and detoxification as well regulation of calcium ions. Rough Endoplasmic Reticulum Similar to SER‚ Rough endoplasmic reticulum is a phospholipid membrane network that forms cytosol
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unit of structure for all organisms d) All cells must contain organelles e) None of the above This organelle is involved in the synthesis of lipids‚ the detoxification of drugs and toxins‚ and in storage of ions. a) Rough endoplasmic reticulum b) Smooth endoplasmic reticulum c) Mitochondria d) Golgi apparatus e) Nucleus Which of the following is NOT found in the
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Cells are some of the smallest organisms around. All living things consist of cells‚ and yet they are invisible to the naked eye. Cells are the basic structural and functional units of life. Cells are made up of many different parts which allow them to function properly. All cells are separated from their surrounding by a cell membrane. The cell membrane regulates what enters and leaves the cell and also aids in the protection and support of the cell. A cell membrane
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its cellular processes. Almost all eukaryote cells have a nucleus. The nucleolus is located in the nucleus it is 1-2 um. Its function is to manufacture ribosomes. The ribosomes are found either free in the cytoplasm or attached to the rough endoplasmic reticulum R.E.R‚ They are 20nm in size and their function is to synthesise the protein in the cell. The cell surface membrane controls the entry and exit of substances in and out of the cell. It is partially permeable. It separates’ the cells contents
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W2: Assignment 2 Lisa Majdecki South University Online THE ORGANELLES OF EUKARYOTIC CELLS . The difference between Prokaryotic and Eukaryotic Cells is organelles‚ membrane enclosed structures that perform specific duties. The most important of all is the “nucleus‚” this holds the DNA and is surrounded by a double membrane. The Prokaryotic lacks a nucleus which is not partitioned from the other cells by membranes. The region between the nucleus and plasma membrane is called
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of the following cellular alterations would most likely be seen in his myocardium? And why? Answer: hypertrophy | Hypertrophy‚ because of increased work load Synthesis of more structural & functional components of cell. -Increase Endoplasmic reticulum ER‚ -Increase Mitochondria -Increase Myofilaments -Increase synthesis of structural proteins and DNA Question3 Marks: 1 Case #3: A 69-year-old man has had difficulty with urination‚ including hesitancy and frequency‚ for the past 5
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Phospholipid bi-layer | * Physical barrier between the contents of the nucleus and the cytoplasm | * Nuclear pores | * Facilitate and regulate exchange of materials i.e. RNA & Proteins between the nucleus and cytoplasm | Endoplasmic reticulum * Flattened membrane-bound sacs called cisternae * Continuous with the outer nuclear membrane Structure | Function | Rough ER – Studded with ribosomes | To transport proteins made on the ribosomes for secretion from the cell
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synthesised in the nucleolus. The ribosomes move out of the nucleus to help with protein synthesis. The ROUGH EDOPLASMIC RETICULUM looks rather “pebbeled” through a microscope because of the ribosome’s that are present on the surface. The ribosomes have under gone protein synthesis and so they collect here to be transported to the Golgi apparatus. The SMOOTH EDNOPLASMIC RETICULUM appears “smooth” through a microscope (hence the name)‚ these carry out different functions depending on the type of cells
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Functions of the cells The functions of cells are shown in the body which is comprised entirely of cells. Every cell also has its own or more than one job to do. The cell membrane The cell membrane also known as the - plasma membrane. It consist of two layers of a fatty type substance. Its function is to protect the inside and the outside of the cell by allowing certain substances into the cell‚ while keeping other substances out. It also serves as a base of attachment for the cytoskeleton in some
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Social Care Cells Introduction For this assignment I will have to talk about the organisation‚ e.g. cells‚ tissues‚ organs and systems. And the cells‚ e.g. cell membrane‚ nucleus‚ cytoplasm; organelles- mitochondria‚ smooth and rough endoplasmic reticulum‚ golgi apparatus and lysosome. Organisation; Every individual is composed of billions of microscopic units called cells. The cells carry out vast numbers of chemical reactions and processes that make up the essence of life itself. Cells
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