B4 - bionergetics

• the process by which plants use the energy from sunlight to produce glucose from carbon dioxide and water
• Light is taken in by plants to make energy it also uses gas exchange (carbon dioxide to oxygen )
• word equation for photosynthesis:

  carbon dioxide + water → glucose + oxygen
• Symbol equation for photosynthesis:

  6CO2 + 6H2O → C6H12O6 + 6O2
• Sunlight, carbon dioxide, soil organisms and water are the key points of photosynthesis
• Plants convert glucose into start for storage because starch is insoluble which makes it much better for storing then glucose a cell field of lots of glucose would draw in a lot of water by osmosis and swell up
• Chlorophyll is a pigment that is found in chloroplast of green plants. It absorbs and energy from light which is used to convert carbon dioxide and water into glucose and oxygen.
• Peacey is glucose for a number of things for example in respiration this transfers energy from glucose to the plants can convert the rest of the glucose into the useful substances. To make cellulose strengthen their cell wall. To make amino acids plants do this by combining glucose with nitrate ions ( acids are used to make proteins)
• Temperature, light intensity and CO2 concentration are the three environmental variables that can affect rate of photosynthesis
• Lola of chlorophyll in the plants chloroplast will decrease the rate of photosynthesis is because the chloroplast can’t absorb as much light
• The rate at which a plant gives out oxygen corresponds to the rate of photosynthesis
• A very high temperature reduces the rate of photosynthesis (high temperature is damage the enzymes that plants need for photosynthesis)
• In respiration, the energy is transferred to the environment as it is an exothermic reaction
• Metabolism is the sum of all the chemical reactions that happen in the body or in a cell
• Fermentation is anaerobic respiration in East
• Your pulse rate will increase if you increase the intensity of your exercise because this helps to get more oxygenated blood around the body faster and increases the rate in which carbon dioxide is removed from the body
• Hi Sophie increases the bodies demand for energy (muscles need energy to contract when you exercise your muscles contract more often than normal so you need more energy)