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8C respiration
By Katie Bruce
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Last updated 8 months ago
30 questions
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What is the word equation for aerobic respiration?
Oxygen + Glucose → Carbon Dioxide + Water + Energy
Carbon Dioxide + Water → Oxygen + Glucose
Oxygen + Glucose --> Carbon dioxide + water
Glucose + Water → Oxygen + Carbon Dioxide
What is the main purpose of respiration?
To produce carbon dioxide
To release energy for cells
To create oxygen
To break down food into waste
Where does respiration mainly take place in a cell?
Nucleus
Ribosomes
Mitochondria
Cell membrane
What gas is needed for aerobic respiration?
Oxygen
Nitrogen
Carbon dioxide
Hydrogen
What is produced in anaerobic respiration in humans?
Alcohol
Lactic acid
Oxygen
Carbon monoxide
Why does anaerobic respiration happen in muscles?
There is plenty of oxygen available
The body needs extra energy, and there is not enough oxygen
It happens only when you are asleep
It removes waste products from the body
What is the word equation for anaerobic respiration in humans?
Glucose → Carbon Dioxide + Water + Energy
Glucose → Lactic Acid + carbon dioxide
Oxygen + Glucose → Carbon Dioxide + Water + Energy
Glucose + Oxygen → Lactic Acid + Water
What problem can lactic acid cause in muscles?
It increases energy levels
It causes muscle fatigue and cramping
It makes muscles stronger
It cools down the body
What is oxygen debt?
The amount of oxygen needed to break down lactic acid
The amount of oxygen stored in muscles
The amount of oxygen lost when breathing
The amount of oxygen in the air
How do cells use the energy released from respiration?
To grow and repair
To generate heat
For movement
All of the above
Which organ is responsible for gas exchange in humans?
Heart
Liver
Lungs
Stomach
What happens when you inhale?
Your diaphragm moves up and your chest gets smaller
Your diaphragm moves down and your chest expands
Your ribs move down and in
Your lungs get smaller
What happens to oxygen in the alveoli?
It moves into the blood
It moves into the lungs
It turns into carbon dioxide
It moves into the stomach
What gas is removed from the body when you exhale?
Oxygen
Carbon dioxide
Nitrogen
Hydrogen
Why do alveoli have a large surface area?
To store more air
To allow faster diffusion of gases
To keep the lungs warm
To help oxygen dissolve in blood
What is the role of the diaphragm in breathing?
It pumps blood around the body
It helps the lungs expand and contract
It digests food
It filters oxygen from the air
How does oxygen enter the bloodstream from the alveoli?
It is absorbed through the skin
It diffuses into the blood
It is pumped by the heart into the lungs
It is actively transported by red blood cells
What are the tiny air sacs in the lungs called?
Bronchi
Bronchioles
Alveoli
Capillaries
Which of the following does not happen when you breathe out?
Your diaphragm moves up
Your ribs move down
Air is pushed out of the lungs
Your chest expands
What is the function of cilia and mucus in the respiratory system?
To store oxygen
To trap dust and microbes
To produce energy
To make air warmer
What happens to your breathing rate during exercise?
It slows down
It stays the same
It increases
It stops
Why does your breathing rate increase during exercise?
To take in more oxygen for respiration
To remove nitrogen from the body
To help digest food
To make your muscles bigger
Which gas is produced more during exercise and needs to be removed?
Oxygen
Carbon dioxide
Nitrogen
Hydrogen
Why do muscles need more energy during exercise?
To store more fat
To contract and move
To get rid of carbon dioxide
To make new cells
How does exercise strengthen the lungs?
It increases lung capacity
It decreases lung function
It stops gas exchange
It thickens the alveoli walls
What happens to heart rate during exercise?
It slows down
It stays the same
It increases
It stops
Which body system works with the respiratory system to deliver oxygen to muscles?
Digestive system
Nervous system
Circulatory system
Skeletal system
How does regular exercise affect resting breathing rate over time?
It increases it
It decreases it
It stops it
It stays the same
Which of these is a long-term effect of regular exercise?
Weaker heart
Improved lung efficiency
Less oxygen supply
Reduced energy production
Why do athletes recover more quickly after exercise?
Their muscles produce less lactic acid
Their hearts and lungs are more efficient
Their blood has less oxygen
They do not need respiration