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RT 140 Ch.4
Radiation Protection
Question | Answer |
---|---|
What is most abundant in the body? | Water makes up 80 to 85% of the weight of an average active cell |
Water is able to do what in the body? | A solvent, A transport vehicle, Maintains constant Body core Temp (98.6 F), Provides Cushion for vital organs, Lubricates Digestive system, Lubricates Articulations |
Hydrophobic | Water repelling |
Hydrophilic | Water attracting |
Protoplasm | Chemical building blocks for all living materials |
What are the four major elements forming protoplasm? | Carbon, Hydrogen, Oxygen, Nitrogen |
Proteins | Are 15% of cell content and are the basic building blocks of all cells and tissue |
Proteins are essential for? | Essential for growth and repair damaged or debilitated tissue |
We have how many Amino Acids in Protein Synthesis? | 22 |
Amino Acids are held together by? | Peptide bond |
Structural Proteins | Provide body with shape and form & Source of Heat and Energy |
Enzymatic Proteins | Function as Organic Catalyst (Enzymes) & Are not altered in chemical reactions & Necessary to initiate many reaction |
Ribosome is the site of? | Site of Protein Production |
Repair Enzymes | Repair Damage to cell from Radiation Damage |
Proteins | Function as Hormones and Antibodies |
Hormones | Produce by endocrine System, Thyroid Hormones to Control Metabolism, Regulate Growth and Development |
Antibodies | Produced by B-Lymphocytes found in Bone Marrow |
What cells cultivate Antibodies? | T-Lymphocytes |
T-Lymphocytes detect? | Antigen presence-Foreign bodies like Bacteria or viruses |
Carbohydrates | Are 1% cell content and are referred to as Saccharides (sugars & starches) |
Carbohydrates provide what to the body? | Energy necessary for all basic cellular functions |
Carbohydrates are composed of? | Carbon, Hydrogen, & Oxygen |
Simple Sugars | Glucose and is the primary energy of the cell |
Monosaccharide | Is a single unit of sugar (like Fructose & Galactose) |
Disaccharide | Two units of simple sugars linked together (like Sucrose-Cane sugar) |
Polysaccharide | Several simple sugar units linked together (like Plant starches and Animal glycogen) |
What is the function for Carbohydrates? | short term energy storage for body, Fuel for Metabolism, Abundant in liver and Muscle |
Lipids | 2% of cell content Referred to as Fats, Organic Macromolecules Large molecules built from smaller chemical structures (Glycerin + 3 fatty acids) |
What is the function of Lipids? | 1 Act as Energy reservoirs 2 Insulate and guard body 3 Support and Protect 4Essential for growth and development 5 Lubricate articulations 6 Assist in Digestive process |
Nucleic Acids | 1% cell component, DNA & RNA - storage, transmission, translation of genetic information |
DNA | passes genetic information from one generation to the next & directs cellular activity |
RNA | formation of proteins |
Deoxyribonucleic Acid (DNA) Composition | Two Sugar Phosphate Chains, 5 carbon sugar, Phosphoric acid |
Nucleic Acids | They are complex molecules, larger than most proteins, and contain, oxygen, hydrogen, nitrogen, and phosphorous |
Deoxyribonucleic Acid (DNA) occurs in? | The chromosomes in the nucleus of the cell and, in much smaller amounts, in the mitochondria |
Where is Ribonucleic Acid (RNA) present? | Is present in the nucleus, especially in the nucleolus, and also in the ribosomes which are in the cytoplasm and on the rough ER |
Nucleic acids are composed of units called? | Nucleotides, each of which contains a nitrogenous base, a five carbon sugar and phosphoric acid |
What are the two types of nitrogenous bases? | Purines and Pyrimidines |
What are the purines and pyrimidines of DNA? | Purines *adenine *guanine Pyrimidines *thymine *cytosine |
What are the purines and pyrimidines of RNA? | Purines *adenine *guanine Pyrimidines *uracil *cytosine |
Protein Synthesis | Transcription generates not only the mRNA that carry's the information for protein synthesis but transfer, ribosomal and other RNA molecules that have structural and catalytic functions. |