Presentation on theme: "4.2 Respiration 7.1.d Students know that mitochondria liberate energy for the work that cells do and that chloroplasts capture sunlight energy for photosynthesis."— Presentation transcript:
4.2 Respiration 7.1.d Students know that mitochondria liberate energy for the work that cells do and that chloroplasts capture sunlight energy for photosynthesis.
What is Respiration? Respiration- the process but which cells obtain energy from glucose Key Concept: “During respiration, cells break down simple food molecules such as sugar and release the energy they contain. Cells of all living things carry out respiration because they need energy Cells store energy like we store money in a bank- capture energy from sun and save during photosynthesis- when need energy the break down carbohydrates in respiration
Two Stages of Respiration During respiration, cells break down simple food molecules such as sugar and release the energy they contain.
What is Respiration? 2 meanings for respiration- cellular respiration and breathing Products of respiration-carbon dioxide and water We breathe out carbon dioxide Plants undergo Photosynthesis and make its own food (sugar) Animal cells (and some others) get their glucose from eating plants or animals that ate plants Respiration and Photosynthesis keep levels of oxygen constant on Earth Respiration video Respiration video
What is Respiration? Respiration equation: Raw MaterialsProducts Video on Cellular respiration Yields Sugar Oxygen Carbon Dioxide Water
Photosynthesis and Respiration You can think of photosynthesis and respiration as opposite processes.
Fermentation Fermentation- energy releasing process does not need oxygen Key concept: “Fermentation provides energy for the cell without using oxygen.” Amount of energy released is less than during respiration Mitochondria
Fermentation- Alcoholic Type of fermentation when yeast and some other single celled organisms break down sugars Called alcoholic because one of its products is alcohol Other products are carbon dioxide and energy Important to bakers- raises dough and creates bubbles in alcohol drinks
Fermentation- Lactic Acid Takes place at times in your body When running muscle cells use oxygen faster than it can replace it Cells lack energy and fermentation occurs Product is lactic acid When the lactic acid builds up you feel pain (and weakness) in your muscles
What events occur during respiration? What is fermentation? Section 2: Respiration