827166
Questão 1
Questão
Which of these is the correct, general, word equation for aerobic respiration?
Responda
-
water + carbon dioxide --> glucose + oxygen
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glucose + carbon dioxide --> water + oxygen
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glucose + oxygen --> carbon dioxide + water
Questão 2
Questão
Which of these is the correct, general, balanced symbol equation for aerobic respiration?
Responda
-
6H2O + 6CO2 --> C6H12O6 + 6O2
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C6H12O6 + 6CO2 --> 6H2O + 6O2
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C6H12O6 + 6O2 --> 6CO2 + 6H2O
Questão 3
Questão
What is the "unit" of energy in the cell, released by respiration?
Responda
-
Adenosine monophosphate, AMP
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Adenosine diphosphate, ADP
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Adenosine triphosphate, ATP
Questão 4
Questão
True or false? Mitochondria have a folded inner surface to maximise their surface area for enzymes to carry out aerobic respiration.
Responda
- True
- False
Questão 5
Questão
True or false? Active cells, such as muscle cells, need few mitochondria as these release more energy from respiration than the mitochondria in inactive cells.
Responda
- True
- False
Questão 6
Questão
Which of these would not be an ethical way of showing that peas respire?
Responda
-
Using a thermometer to show a rise in temperature which indicates that energy is being released from the peas
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Comparing sets of peas with varying concentrations of oxygen to see how long they live
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Piping off the gas produced by the respiring peas and bubbling it through limewater to test for carbon dioxide
Questão 7
Questão
Which of these activities are important uses of the energy from respiration?
Responda
-
Diffusion of glucose molecules across the partially permeable membrane of the cell
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Synthesis reactions, such as the construction of amino acids from nitrate ions in plants
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Contraction of muscles for movement
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Enabling chloroplasts to carry out photosynthesis
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Maintenance of core body temperature in mammals and birds
Questão 8
Questão
True or false? Muscles are made up of bundles of fibres.
Responda
- True
- False
Questão 9
Questão
What name is given to pairs of muscles which contract in opposite directions to produce movement?
Responda
-
Antagonistic
-
Protagonistic
-
Realistic
Questão 10
Questão
What do animals store excess glucose molecules as?
Responda
-
Starch
-
Cellulose
-
Protein
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Glycogen
Questão 11
Questão
True or false? Carbon dioxide must be removed from the blood because it lowers blood pH.
Responda
- True
- False
Questão 12
Questão
Which of these effects occur to the cardiovascular system when you exercise?
Responda
-
Heart rate increases
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Heart rate decreases
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Blood vessels constrict
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Blood vessels dilate
Questão 13
Questão
Which of these effects occur to the respiratory system when you exercise?
Responda
-
Breathing rate decreases
-
Breathing rate increases
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Depth of breaths increases
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Depth of breaths decreases
Questão 14
Questão
Why do humans sometimes undergo anaerobic respiration?
Responda
-
The air is too polluted so there is too little oxygen in the air
-
The demand for oxygen in respiring cells exceeds the capacity of the blood vessels for carrying oxygen to them
-
The nasal cavities become blocked by mucus so too little oxygen can enter the lungs
Questão 15
Questão
Which of these is the correct, general, word equation for anaerobic respiration in humans?
Responda
-
glucose --> lactic acid
-
glucose --> carbon dioxide + water
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lactic acid --> glucose
Questão 16
Questão
Which of these is the correct, general, word equation for anaerobic respiration in yeasts?
Responda
-
glucose --> ethanol
-
glucose --> ethanol + carbon dioxide
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ethanol --> glucose
Questão 17
Questão
True or false? Lactic acid stimulates the muscles to continue exercising.
Responda
- True
- False
Questão 18
Questão
True or false? Anaerobic respiration is inefficient as glucose is not completely broken down.
Responda
- True
- False
Questão 19
Questão
Why do you continue to puff and pant after you have stopped using your muscles for a long period of time?
Responda
-
The brain is fooled into thinking that you are still using your muscles
-
Breathing out helps to cool down the body's core temperature
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Oxygen is needed to completely break down the lactic acid in your muscles
Questão 20
Questão
What is the oxygen debt?
Responda
-
The amount of money owed by scuba divers for oxygen tanks
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The amount of oxygen needed to break down lactic acid in your muscles
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The amount of oxygen needed to ensure that cardiac muscle has enough energy to continue beating
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