Excretion and Metabolic Wastes

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Presentation transcript:

Excretion and Metabolic Wastes No Crap About it!

What are Metabolic Wastes? All cells metabolize sources of energy to keep them ticking over in terms of making energy molecules they can use to do 'work' with, or making structural components for the cell.

What are Metabolic Wastes? This involves breaking down larger molecules or using energy to build them. Inevitably there are left over pieces that are useless and may or may not be recyclable, hence metabolic waste.

What are Metabolic Wastes The cell will want to get rid of this waste as if its allowed to build up it will become toxic to the cell.

Quick Question Brainstorm some metabolic wastes produced in the human body. Where do each of these waste products come from? (Hint: Think about why we sweat and urinate?)

Waste Products Waste Product Origin of Waste Product Excretory Organ Ammonia Breakdown of amino acids in the liver. Kidneys Urea Conversion of ammonia in the liver. Kidneys, skin Carbon Dioxide Cellular Respiration (breakdown of glucose in the cells) Lungs, intestines, skin Water Cellular respiration (breakdown of glucose in the cells) Kidneys, lungs, intestines, skin Mineral Salts Food and water Kidneys, lungs

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