B2 Topic1

bB2 Topic 1 ventilation; breathing occurs in the lungs entirely external respiration is a chemical reaction that occurs in the cells Respiration is breaking down glucose to release energy. Aerobic respiration unavoidably plenty of oxygen. Glucose + oxygen Carbon Dioxide + Water (+ENERGY) C6H12O6 + 6 O2 ? 6 carbonic paneling gas + 6 water system + Energy The circulatory system carries oxygen, glucose and CO2 around the torso in the blood. Glucose comes from the breaking down of foods in the digestive system. Oxygen comes from air breathed into lungs. Capillaries = smallest blood vessels in the body. They supply cells with glucose and oxygen and take away the CO2. Diffusion is the significance of particles from an area of higher(prenominal) concentration to an area of lower concentration. When you ferment you respire to a greater extent, more oxygen directs into your cells and CO2 is removed quicker. that when you do vigorous do (sprinting) your body can t supply oxygen to your muscles quick enough, so it uses anaerobic respiration. This doesnt use oxygen at all. Glucose Lactic Acid (+ somewhat ENERGY) it does not release as much energy, you cant use it for so longsighted either and the lactic acid is painful. This means you have to bind breathing hard to turn lactic acid into virtuous CO2 and water.

DNA do proteins A DNA is a double helix, with sugar and inorganic phosphate backbone. It is held together by bases, Adenine & Thymine, Guanine & Cytosine. [A-T & C-G] A ingredient (section of DNA) codes for a special protein. Each three bases (triplets ) codes for a particular proposition amino! group acid. Proteins are do up of loads of amino acids joined up in a particular order. nevertheless one side of the DNA ladder acts as a code for making proteins (the coding cosmic string.) Proteins are made by Ribosomes. [PROTEIN SYNTHESIS] 1 The DNA unzips 2 The DNA acts as a template to make mRNA (it has a hotshot strand and Thymine is replaces with Uracil.) 3 This is called transcription. 4 The mRNA so leaves the core through the nuclear pore (the gaps in...If you want to get a full essay, order it on our website: BestEssayCheap.com

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