Topic 4 Respiration Flashcards
What is anaerobic respiration
The release of a little bit of energy without oxygen
What is the equation for respiration
Glucose + oxygen —-> water + carbon dioxide+ energy
What chemical builds up in muscle and causes pain during exercise
Lactic acid
Why is lactic acid formed
Incomplete breakdown of glucose
Name the chemical reaction which releases energy
Respiration
Name an energy that is lost during respiration
Heat energy
Why is respiration important to all cells
They need energy to grow
Why is cotton wool used in an experiment of living seeds
Allows gas to diffuse in and out
Why is it important that a thermos flask is used in an experience testing living seeds
To keep the heat in
What is lactic acid
A poison which builds up during anaerobic respiration causing a stich
Define inspiration
The taking in of air
Define expiration
The breathing out of air
Where does gas exchange take place
Alveoli
Why are alveoli good at exchanging gases
They have a large surface area, they have a good blood supply, they are moist, they have a thin membrane (short diffusion pathway)
What happens during inspiration
The diaphragm moves down The ribcage moves up The volume in lung creases Causing the pressure in the lungs to decrease Air rushes in
What happens during expiration
The diaphragm moves up The ribcage moves down The volume in the lungs decrease Causing the pressure in the lungs to increase Air rushes our
What happens if you add disinfectant to live peas
It will kill the microbes, no respiration will occur and no temperature increase
What is the thermos flask used for
Used at the control, the outside air temperature will not affect the result
Name a chemical produced during respiration
Carbon dioxide
What chemical builds up during exercise causing muscle pain
Lactic acid
Explain how a good blood supply helps to prevent an oxygen debt
The blood carries the oxygen, meaning there is more oxygen available for the cells
What process releases heat energy
Respiration
What gas is produced in respiration
Carbon dioxide
What do living organisms use respiration for?
Growth
Repair
Movement
