B3c: Respiration

 Respiration is a vital reaction that takes place inside cells. It releases the energy that is needed to drive many other metabolic reactions. This item provides candidates with the opportunity to collect and analyse scientific data concerning respiration rates. They can also gain the skills of working accurately and safely, individually and with others, to collect first-hand data when investigating pulse recovery times.

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What is the word equation for aerobic respiration?
glucose + oxygen = carbon dioxide + water
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Name three life processes that require energy from resiration.
Muscle contraction, protein synthesis and control of body temperature in mammals.
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What does respiration provide?
The energy needed for all life processes in plants and in animals.
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Why does breathing and pulse rates increase during exercise?
To allow oxygen and glucose to be delivered to muscle cells more quickly and to allow waste carbon dioxide to be removed more quickly.
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What is the balanced symbol equation for aerobic respiration?
C˅6H˅12O˅6 + 6O˅2 → 6CO˅2 + 6H˅2O
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How do you calculate the respiratory quotient (RQ)?
RQ = carbon dioxide produced/oxygen used
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What does respiration result in the production of? What is this substance used by?
ATP - used as the energy source for many processes in cells.
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What the metabolic rate?
The metabolic rate is the rate at which energy is used by the body.
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Why can the rate of oxygen consumption be used as an estimation for metabolic rate?
Aerobic respiration needs oxygen, the rate of oxygen consumption can be used as an estimate of metabolic rate.
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Why is the rate of respiration is influenced by changes in temperature and pH?
This is because enzymes are involved in respiration, and their activity varies with temperature and pH.
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Explain why anaerobic respiration takes place during hard exercise in addition to aerobic respiration.
During hard exercise, anaerobic respiration takes place as well as aerobic respiration. Anaerobic respiration does not need oxygen for it to happen.
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What does anaerobic respiration produce? What does this cause?
Produces lactic acid - which accumulates in muscles causing pain and fatigue.
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What is the word equation for anaerobic respiration?
Glucose = lactic acid
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Which type of respiration creates more energy per glucose molecule?
Aerobic respiration.
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Why does hard exercise cause fatigue?
This is because lactic acid from anaerobic respiration builds up in the muscles. It takes a while to recover from hard exercise, during which time you may still breathe heavily and have a higher heart rate than normal.
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Describe why it takes so long to recover from hard exercise.
Hard exercise causes a lack of oxygen in cells, Glucose is not broken down completely in anaerobic respiration, Panting replaces oxygen, allowing aerobic respiration to happen, The increased heart rate ensures that the blood carries lactic acid away.
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Other cards in this set

Card 2

Front

Name three life processes that require energy from resiration.

Back

Muscle contraction, protein synthesis and control of body temperature in mammals.

Card 3

Front

What does respiration provide?

Back

Preview of the front of card 3

Card 4

Front

Why does breathing and pulse rates increase during exercise?

Back

Preview of the front of card 4

Card 5

Front

What is the balanced symbol equation for aerobic respiration?

Back

Preview of the front of card 5
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