Biology

Created by: Hafsa Syed
Created on: 10-05-13 22:13

aerobic respiration- your rate and depth of breathing goes up, which gets more oxygen into the lungs and the blood. your heart rate goes up, so blood with oxygen is quickly delivered to muscle cell, more glucose to muscle cells. glycogen into glucose

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Anaerobic respiration- happens when your muscles are not delivered with enough extra oxygen to respire during excersise, cytoplasm of cells, LACTIC acid instead of co2, cannot be used for longer as it is toxic causes muscle fatique, blood flows/takes

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oxygen debt- glucose to breakdown lactic acid, < lowers the pH this redices the activity of enzymes so muscle don't contract efficiently, when your heart and breathing rate increases the extra oxygen is used to oxidise the lactic acid to co2 and h2o

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Mitosis- growth, repair and replacement of dead cells. Division starts, a copy of each chromosomes is made the this cell divides in two to form daughter cells, have a nucleus with four chromosomes identical to the parent cell all cells except sex cel

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Meiosis- normal division, the cell divides into two and these are immediatly divided again,this gives four cells each with a single set of chromosomes in the case two instead of the original four

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Main causes of Extinction- new diseases, new competitors, major catastrophic events e.g. massive volcanic eruptions, new predators or hunters

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Main causes of Extinction- new diseases, new competitors, major catastrophic events e.g. massive volcanic eruptions, new predators or hunters

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