Inside Living Cells:
- Process of breaking down glucose to release energy. Occurs in every cell in your body.
- All living things respire.
- Energy is used to build larger molecules (proteins etc), contract muscles and maintain body temp.
- Aerobic respiration needs oxygen. Most efficient type of respiration.
- Glucose + Oxygen -> Carbon Dioxide + Water (+ energy).
- Circulatory system carried glucose, oxygen and CO2 around the body in the blood.
- Glucose for respiration comes from breaking down food (digestive system).
- Oxygen comes from lungs. CO2 is breathed out.
- Smallest blood vessels are capillaries. All cells have them nearby to supply them with glucose and oxygen.
- Move from capillaries by diffusion (movement from an area of high concentration to low concentration to reach equilibrium).
- Cells use up oxygen and glucose in respiration. Low concentration in cell, so they diffuse out of capillaries into the cells.
- Cells produce CO2 in respiration. High concentration in cell, so they diffuse out of cells into capillaries.
Respiration and Exercise:
- When you exercise you respire more.
- Muscles need more energy from respiration to contract.
- Increases respiration accelerates heart rate to get more oxygen and remove more CO2.
- In vigourous exercise you can't get enough oxygen…