Respiration

Created by: leah.cm
Created on: 07-03-23 20:18

Aerobic respiration

This uses oxygen.
It produces the most energy.
Most of the reactions that make up aerobic respiration occur in the mitochondria.

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Anaerobic respiration

Occurs when there is not enough oxygen.
It does not yield as much energy as aerobic respiration.
In animals:
Glucose ---> Lactic acid
In plant and yeast cells it is called
fermentation:
Glucose ---> Ethanol + Carbon dioxide

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Fermention

This reaction is used to make bread
and alcoholic drinks.

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Response to exercise

Respiration has to occur faster, and therefore more oxygen needs to be supplied to cells
(and more CO2 removed). This is done by:
● Heart rate increasing
● Breathing rate increasing
● Breath volume increasing

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Oxygen debt

Oxygen debt is the amount of extra oxygen the body needs after exercise to react with the lactic acid and remove it from the cells.

Blood flowing through the muscles transports the lactic acid to the liver where it is
converted back to glucose.

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Metabolism

- sum of all the reactions in a cell or the body.

These processes are controlled by enzymes.

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Examples of metabolic reactions:

1. Glucose molecules being converted to starch, glycogen and cellulose by being joined together
2. A glycerol molecule and three molecules of fatty acids forming a lipid molecule
3. Glucose and nitrate ions forming amino acids, which are used to form prot

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Other cards in this set

Card 2

Front

Anaerobic respiration

Back

Card 3

Front

Fermention

Back

Card 4

Front

Response to exercise

Back

Card 5

Front

Oxygen debt

Back

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Respiration