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Because of their need for high pressure, the kidneys also help control blood pressure by producing a blood vessel-constricting protein (angiotensin) that also signals the body to retain sodium and water.
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2. Carbohydrates, lipids and proteins.
- Carbohydrates after digestion produce: glucose
- Lipids after digestion produce: fatty acids and glycerol
- Protein after digestion produce: amino acids
3. Photosynthesis helps by converting carbon dioxide into oxygen and glucose. The glucose is used as food for the plant and oxygen is a by-product. Cellular respiration converts the oxygen and glucose into water and carbon dioxide. Carbon dioxide and water are both by-products and ATP is the energy that is produced from this process. They both work hand-in-hand to make ATP.
The permanent gases whose percentages do not change from day to day are nitrogen<span>, </span>oxygen<span> and</span>argon<span>. </span>Nitrogen<span> accounts for 78% of the atmosphere,</span>oxygen<span> 21% and </span>argon<span> 0.9%. Gases like </span>carbon dioxide<span>, nitrous oxides, </span><span>methane</span>
