2.6.2 Aerobic Respiration Flashcards

1
Q

Aerobic respiration requires, what?

A

oxygen

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2
Q

Aerobic respiration is defined as, what?

A

the chemical reaction in cells that uses oxygen to break down nutrient molecules to release energy

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3
Q

Aerobic respiration is the complete breakdown of, what?

A

glucose to release a relatively large amount of energy for use in cell processes and reactions

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4
Q

In aerobic respiration what are carbon dioxide and water for?

A

Carbon dioxide and water are produced as waste products as well as releasing useful cellular energy

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5
Q

What is the word equation for Aerobic Respiration

A

Glucose + Oxygen = Carbon Dioxide + Water

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6
Q

What is the chemical equation for Aerobic Respiration

A

C6H12O6 + 6O2 -> 6 CO2 + 6H20

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7
Q

Exam Tip

A

There are usually 3 marks given for the aerobic respiration chemical equation in an exam:

One for getting the correct formula for glucose and oxygen

One for getting the correct formula for carbon dioxide and water

One for balancing the equation correctly

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8
Q

Anaerobic respiration does not require, what?

A

oxygen

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9
Q

What is anaerobic respiration defined as?

A

It is defined as the chemical reaction in cells that breaks down nutrient molecules to release energy without using oxygen

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10
Q

Anaerobic respiration involves the incomplete breakdown of glucose, and so releases, what?

A

a relatively small amount of energy for use in cell processes

Different breakdown products are formed depending on the type of organism that the anaerobic respiration is taking place in

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11
Q

Where does Anaerobic respiration mainly take place

A

in muscle cells during vigorous exercise

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12
Q

When we exercise at high intensities, our muscles have, what?

A

higher demand for energy

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13
Q

Our bodies can only deliver so much oxygen to our muscle cells for, what?

A

aerobic respiration

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14
Q

When oxygen runs out, what happens

A

glucose is broken down without it, producing lactic acid instead

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15
Q

What releases more energy, Anaerobic respiration or aerobic respiration

A

Anaerobic respiration releases less energy than aerobic respiration

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16
Q

What is the word equation for anaerobic respiration in animals

A

Glucose -> Lactic Acid

17
Q

What is the chemical equation for anaerobic respiration in animals

A

C6H12O6 -> 2C3H6O3

18
Q

What does lactic acid do?

A

Lactic acid builds up in muscle cells and lowers the pH of the muscle tissue (making the conditions more acidic)

19
Q

What can acidic conditions do to enzymes in cells?

A

Acidic conditions can denature the enzymes in cells

20
Q

What will eventually happen to Lactic Acid

A

Lactic acid will eventually be broken down using oxygen to produce carbon dioxide and water as waste products

21
Q

The amount of oxygen required to break down the lactic acid that has built up is referred to as, what?

A

oxygen debt

22
Q

The process of breaking down the lactic acid is known as, what?

A

repaying the oxygen debt

23
Q

Plants and yeast can respire without, what?

A

oxygen

24
Q

In the absence of oxygen what do Plants and Yeast do?

A

breaking down glucose in the absence of oxygen to produce ethanol and carbon dioxide

25
Q

Anaerobic respiration in yeast cells is called, what?

A

fermentation

26
Q

Fermentation is economically important in the manufacture of, what?

A

bread (where the carbon dioxide produced helps the dough to rise) and in brewing (where the ethanol produced makes beer)

27
Q

What is the word equation for anaerobic respiration in yeast

A

Glucose -> Alcohol + Carbon Dioxide

28
Q

What is the chemical equation for anaerobic respiration in yeast

A

C6H12O6 -> 2C2H5OH + 2CO2

29
Q

(Comparing Aerobic & Anaerobic) Oxygen

A

Aerobic: Needed
Anaerobic: Not Needed

30
Q

(Comparing Aerobic & Anaerobic) Glucose Breakdown

A

Aerobic: Complete
Anaerobic: Incomplete

31
Q

(Comparing Aerobic & Anaerobic) Products

A

Aerobic: Carbon Dioxide and Water

Anaerobic:
Animal Cells; Lactic Acid.

Yeast; Carbon Dioxide and Ethanol

32
Q

(Comparing Aerobic & Anaerobic) Energy Released

A

Aerobic: A lot
Anaerobic: A little