All living organisms use respiration to release energy from organic molecules. The energy is used in the organism, for example, for growth and movement.
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What is Aerobic respiration?
Aerobic respiration uses oxygen from the air to release energy from glucose. The products of aerobic respiration are carbon dioxide and water.
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What is the word equation for aerobic respiration?
Glucose + Oxygen --> Carbon Dioxide + Water (+ energy)
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What is diffusion?
Many substances enter and leave the body by diffusion. These substances include gases such as oxygen and carbon dioxide, and small digested food molecules such as glucose.
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Why is diffusion a net movement?
Diffusion is the net movement of particles from an area of higher concentration to an area of lower concentration. Particles are always moving and net movement is the sum of the movement of all particles.
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What happens when you exercise?
When you exercise, your heart and breathing rate increase. The harder you exercise, the more these rates increase.
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How are the heart and breathing rate measured?
Heart rate can be measured by taking your pulse at the wrist. It is usually measured as number of beats per minute. Breathing rate is measured by counting the number of breaths in one minute.
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Why do heart race and breathing rate change?
During exercise, muscle cells are respiring faster. This means that they need more oxygen and glucose and release more carbon dioxide.
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What does a faster heart rate mean?
A faster heart rate means that blood is pumped faster around the body. The blood takes oxygen and glucose to cells faster and removes carbon dioxide faster.
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What does a faster breathing rate mean?
A faster breathing rate means that can be taken into the body at a faster rate and carbon dioxide can be released faster.
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What is Anaerobic respiration?
Anaerobic respiration is the release of energy from glucose without using oxygen. This produces lactic acid.
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What is the word equation for Anaerobic respiration?
Glucose ---> Lactic acid (+energy)
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What is an advantage of Anaerobic respiration?
Anaerobic respiration is useful for muscle cells because it can release energy to allow muscles to contract when the heart and lungs cannot deliver oxygen and glucose fast enough for aerobic respiration.
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What is a disadvantage of Anaerobic respiration? (1)
Anaerobic respiration releases much less energy from each molecule of glucose then aerobic respiration.
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What is a disadvantage of Anaerobic respiration? (2)
Lactic acid is not removed from the body. It builds up in muscle and blood, and must be broken down after exercise.
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What is EPOC?
Excess post-exercise oxygen consumption. EPOC is the amount of oxygen needed after exercise has ended compared with the resting rate.
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Other cards in this set
Card 2
Front
What is Aerobic respiration?
Back
Aerobic respiration uses oxygen from the air to release energy from glucose. The products of aerobic respiration are carbon dioxide and water.
Card 3
Front
What is the word equation for aerobic respiration?
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