Each question in this quiz is timed.
Which of these is the correct, general, word equation for aerobic respiration?
water + carbon dioxide --> glucose + oxygen
glucose + carbon dioxide --> water + oxygen
glucose + oxygen --> carbon dioxide + water
Which of these is the correct, general, balanced symbol equation for aerobic respiration?
6H2O + 6CO2 --> C6H12O6 + 6O2
C6H12O6 + 6CO2 --> 6H2O + 6O2
C6H12O6 + 6O2 --> 6CO2 + 6H2O
What is the "unit" of energy in the cell, released by respiration?
Adenosine monophosphate, AMP
Adenosine diphosphate, ADP
Adenosine triphosphate, ATP
True or false? Mitochondria have a folded inner surface to maximise their surface area for enzymes to carry out aerobic respiration.
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.
Which of these would not be an ethical way of showing that peas respire?
Using a thermometer to show a rise in temperature which indicates that energy is being released from the peas
Comparing sets of peas with varying concentrations of oxygen to see how long they live
Piping off the gas produced by the respiring peas and bubbling it through limewater to test for carbon dioxide
Which of these activities are important uses of the energy from respiration?
Diffusion of glucose molecules across the partially permeable membrane of the cell
Synthesis reactions, such as the construction of amino acids from nitrate ions in plants
Contraction of muscles for movement
Enabling chloroplasts to carry out photosynthesis
Maintenance of core body temperature in mammals and birds
True or false? Muscles are made up of bundles of fibres.
What name is given to pairs of muscles which contract in opposite directions to produce movement?
What do animals store excess glucose molecules as?
True or false? Carbon dioxide must be removed from the blood because it lowers blood pH.
Which of these effects occur to the cardiovascular system when you exercise?
Heart rate increases
Heart rate decreases
Blood vessels constrict
Blood vessels dilate
Which of these effects occur to the respiratory system when you exercise?
Breathing rate decreases
Breathing rate increases
Depth of breaths increases
Depth of breaths decreases
Why do humans sometimes undergo anaerobic respiration?
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
Which of these is the correct, general, word equation for anaerobic respiration in humans?
glucose --> lactic acid
glucose --> carbon dioxide + water
lactic acid --> glucose
Which of these is the correct, general, word equation for anaerobic respiration in yeasts?
glucose --> ethanol
glucose --> ethanol + carbon dioxide
ethanol --> glucose
True or false? Lactic acid stimulates the muscles to continue exercising.
True or false? Anaerobic respiration is inefficient as glucose is not completely broken down.
Why do you continue to puff and pant after you have stopped using your muscles for a long period of time?
The brain is fooled into thinking that you are still using your muscles
Breathing out helps to cool down the body's core temperature
Oxygen is needed to completely break down the lactic acid in your muscles
What is the oxygen debt?
The amount of money owed by scuba divers for oxygen tanks
The amount of oxygen needed to break down lactic acid in your muscles
The amount of oxygen needed to ensure that cardiac muscle has enough energy to continue beating