30 Questions
Which of the following statements about stomata is true?
Stomata are surrounded by guard and closing cells
What is the main function of guard cells?
To control the opening and closing of stomata
During the daytime, what happens to the guard cells?
They become swollen and full of water
What happens to the guard cells at night?
They shrink and lose water
What is the main purpose of stomata in plants?
To take in carbon dioxide for photosynthesis
What is the color of the cobalt chloride paper after being exposed to exhaled air?
Pink
What is the temperature of inhaled air compared to exhaled air?
Inhaled air is higher in temperature
Which of the following is a key factor in gas exchange in plants?
The presence of stomata
What is the net gas exchange in plants during the daytime?
Net uptake of carbon dioxide and net release of oxygen
What happens to gas exchange in plants at night?
Net uptake of oxygen and net release of carbon dioxide
What is the purpose of using hydrogencarbonate indicator in Experiment 7.7?
To show any change in carbon dioxide content
What is the net release of carbon dioxide in plants?
Net uptake of oxygen and net release of carbon dioxide
What is the main source of food for plants?
Sunlight
What is the role of stomata in gas exchange in plants?
To allow gas exchange
Which gas is removed from our bodies through gas exchange during respiration?
Carbon dioxide
What is the purpose of setting up the boiling tube in Experiment 7.12?
To study the gas exchange in mealworms
What happens to the limewater in flask B and flask D when the vacuum pump is turned on in Checkpoint 7.6?
Limewater in flask B turns yellow and limewater in flask D turns pink
What is the purpose of the diaphragm in the human breathing system?
To draw air into the lungs
Where does gas exchange take place in the human breathing system?
Air sacs
What is the pathway of air flowing through the human breathing system?
Nasal cavity -> Trachea -> Bronchi -> Lungs
What is the texture of the pig's lungs observed in the experiment?
Soft
Which of the following is the primary function of gas exchange in humans?
To provide a continuous supply of oxygen to body cells
Where does gas exchange in humans take place?
In the air sacs inside the lungs
What is the purpose of gas exchange between the air sacs and the blood capillaries?
To allow oxygen to enter the blood and carbon dioxide to leave the blood
How large is the total surface area of our lungs?
About the size of a tennis court
In which lungs do you think gas exchange is more effective, frog's or human's?
Human's
How does smoking affect gas exchange in humans?
It decreases the effectiveness of gas exchange
What is the primary purpose of the vacuum pump in the smoking experiment with pig lungs?
To simulate the smoking process by the lungs
What is the purpose of observing the lung tissue carefully in the smoking experiment with pig lungs?
To determine if the lung tissue floats or sinks in water
What is the effect of smoking on the lungs of a pig, as shown in the smoking experiment?
The lung tissue sinks in water
Discovering Gas Exchange in Animals: Join us in Experiment 7.12 as we explore how artificial respiration can save lives by studying the gas exchange process in different animals. Watch the informative video ev07s12 to learn more!
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