Respirometer Function and Measurement

The video tutorial explains the use of a respirometer to measure the respiration rate of organisms, such as seeds. It describes how the apparatus works, including the role of a capillary tube and colored liquid to track oxygen absorption. The tutorial also covers the function of potassium hydroxide in absorbing carbon dioxide to ensure accurate pressure changes. Additionally, it highlights the importance of a control setup to account for temperature-induced volume changes, ensuring that only oxygen absorption affects the measurements.

What is the primary purpose of a respirometer?

• To measure the rate of respiration

• To measure the rate of photosynthesis

• To measure the rate of fermentation

• To measure the rate of transpiration

How does the respirometer measure the rate of respiration?

• By measuring the sound produced

• By measuring the movement of colored oil or water

• By measuring the change in light intensity

• By measuring the temperature change

What happens to the colored oil or water when seeds absorb oxygen?

• It changes color

• It evaporates

• It moves up the capillary tube

• It moves down the capillary tube

What role does potassium hydroxide play in the respirometer?

• It releases carbon dioxide

• It releases oxygen

• It absorbs carbon dioxide

• It absorbs oxygen

Why is it important to absorb carbon dioxide in the respirometer?

• To decrease the rate of respiration

• To increase the rate of respiration

• To ensure accurate measurement of oxygen absorption

• To prevent the seeds from dying

Why is a filter paper wick used in the respirometer?

• To increase the surface area for oxygen absorption

• To decrease the surface area for carbon dioxide absorption

• To increase the surface area for carbon dioxide absorption

• To decrease the surface area for oxygen absorption

What is the purpose of having a control setup in the respirometer?

• To measure the effect of light on respiration

• To measure the effect of sound on respiration

• To account for temperature changes affecting gas volume

• To account for humidity changes affecting gas volume

What would happen if the respirometer did not have a control setup?

• The oil would evaporate

• The oil would move due to temperature changes

• The oil would change color

• The oil would not move at all

How does the control setup help in measuring respiration accurately?

• By keeping the temperature constant

• By matching the volume change in both setups

• By changing the color of the oil

• By increasing the rate of respiration

What is the effect of temperature on the gas volume in the respirometer?

• It changes the color of the gas

• It has no effect on the gas volume

• It increases the gas volume

• It decreases the gas volume