How does a simple respirometer work GCSE? Simple respirometers consist of a sealed container along with the organism being tested, and a substance, such as soda lime pellets, to soak up the carbon dioxide given off. Oxygen uptake rates are calculated by the displacement of fluid in a glass tube connected to the sealed container.
Full Answer
What is a respirometer?
#96 Using respirometers. A respirometer is a device used to measure the rate of respiration of a living organism by measuring its rate of exchange of oxygen and/or carbon dioxide. They allow investigation into how factors such as age, chemicals or the effect of light affect the rate of respiration. There are various different types of respirometer.
What equipment is used to measure the rate of respiration?
The equipment used is called a respirometer and the effect of changing the temperature on the rate of respiration can be investigated. Respirometers are used to measure the rate of respiration. The diagram shows equipment set up which is being used to measure the respiratory rate of an insect.
How do we measure the rate of respiration?
We can measure the uptake of oxygen in a given time to work out the rate of respiration. The equipment used is called a respirometer and the effect of changing the temperature on the rate of respiration can be investigated.
How does a manometer measure respiration?
Each minute, record the level of the fluid in each tube. As the organisms respire, they take oxygen from the air around them and give out carbon dioxide. The removal of oxygen from the air inside the tube reduces the volume and pressure, causing the manometer fluid to move towards the organisms.
What is the purpose of respirometer?
A respirometer is a device used to measure the rate of respiration of a living organism by measuring its rate of exchange of oxygen and/or carbon dioxide. They allow investigation into how factors such as age, chemicals or the effect of light affect the rate of respiration.
How is respiration represented on a graph?
The rate of respiration is represented by the gradient of the graph.
What is the difference between the distance moved by the manometer fluid in the experimental tube and the distance moved in the control?
The difference between the distance moved by the manometer fluid in the experimental tube and the distance moved in the control tube is therefore due to the carbon dioxide given out. For example, if the respiratory substrate is carbohydrate, then the amount of carbon dioxide given out will equal the amount of oxygen taken in.
How to record manometer fluid?
Open the spring clips. (This allows the pressure throughout the apparatus to equilibrate with atmospheric pressure.) Note the level of the manometer fluid in each tube. Close the clips. Each minute, record the level of the fluid in each tube.
Why is soda lime placed in each tube?
Soda lime is placed in each tube, to absorb all carbon dioxide. Cotton wool prevents contact of the soda lime with the organisms.
What happens when the respiratory substrate is carbohydrate?
For example, if the respiratory substrate is carbohydrate, then the amount of carbon dioxide given out will equal the amount of oxygen taken in. The fluid in the control tube will not move, so y=O.
What is a manometer?
manometer (connected to the Living organisms), to give you an adjusted distance moved.
What is the equipment used to measure the rate of respiration?
The equipment used is called a respirometer and the effect of changing the temperature on the rate of respiration can be investigated. Respirometers are used to measure the rate of respiration. The diagram shows equipment set up which is being used to measure the respiratory rate of an insect.
What is the core practical of respiration?
Core practical - Investigate respiration rate in living organisms. Living organisms take up oxygen from the air and use it for aerobic respiration. We can measure the uptake of oxygen in a given time to work out the rate of respiration.
What does the movement of the liquid towards the insect give a measure of?
Once the apparatus has been set up, the movement of the coloured liquid towards the insect will give a measure of the volume of oxygen taken up by the insect for respiration.
What does the distance moved by the liquid in a given time measure?
The distance moved by the liquid in a given time is measured will provide the volume of oxygen taken in by the insect per minute .
Which system transports oxygen and glucose to the tissues?
The circulatory system transports substances between the exchange surface and cells. It delivers oxygen and glucose to the tissues for respiration, which is the release of energy to cells.
How many tubes are in a syringe?
The apparatus consists of two tubes, one containing the living organisms and the other with glass beads to act as a control.