Respiration Junior Cycle

Respiration

The release of energy from food

Where does respiration happen?

Inside all living cells / all over the body

What is meant by 'aerobic' respiration?

Respiration that uses oxygen

What is meant by 'anaerobic' respiration?

Respiration that does not use oxygen

What is the word equation for aerobic respiration?

Food (Glucose) + Oxygen -> Energy + Carbon dioxide + Water

Where inside a cell does aerobic respiration take place?

Mitochondria

What type of organisms carry out anaerobic respiration?

Yeast, and some types of bacteria

What is the word equation for anaerobic respiration when Yeast cells are doing it?

Food (Glucose) -> Energy + Ethanol + Carbon dioxide

What is the word equation for anaerobic respiration when bacterial cells are doing it?

Food (Glucose) -> Energy + Lactic acid

Which type of respiration releases more energy (aerobic or anaerobic)?

Aerobic

To prove that respiration releases carbon dioxide, you need a chemical test for carbon dioxide. What is this chemical test?

Limewater turns from colourless to milky white

To prove that respiration releases heat, what piece of equipment would show that heat has been released?

A thermometer (the heat causes a rise in temperature)

Name three factors that affect the rate (speed) of respiration

Temperature, Oxygen availability, Glucose availability

Certain cells in the human body are able to respire anaerobically. Which cells are these, and when do they do this?

Muscle cells, when they run out of oxygen (e.g. sprinting for too long)

When muscle cells switch to anaerobic respiration, what acid builds up in the muscle?

Lactic acid

Anaerobic respiration causes lactic acid to build up in a muscle. What does this then cause?

A cramp in the muscle

What carries the glucose to all the cells in the human body to allow respiration to occur?

Blood (plasma carries food)

What carries the oxygen to all the cells in the human body to allow respiration to occur?

Blood (res blood cells carry oxygen)

Which has more carbon dioxide in it - inhaled air or exhaled air?

Exhaled air