WorksheetsIB Ventilation & Gas Exchange
Total questions: 20
Worksheet time: 18mins
Which term describes the physical movements in the thorax which bring fresh air to the alveoli and remove stale air?
gas exchange
respiration
ventilation
circulation
Which of the following is/are processes of all living organisms?
ventilation
homeostasis
metabolism
respiration
Which of the following is/are true for inhalation?
internal intercostal muscles contract
ribcage moves up and out
volume in the thorax decreases
air enters when pressure in the thorax is below atmospheric pressure
Which of the following is/are true for exhalation?
internal intercostal muscles contract
diaphragm muscle is dome-shaped
diaphragm muscle relaxes
the pressure in the thorax increases above atmospheric pressure
Which of the following is/are correct adaptations of alveoli for fast gas exchange?
thin cell wall gives a short diffusion distance
moist inner surface to dissolve O2 and CO2 for diffusion in solution
gas exchange maintains concentration gradients between alveoli and blood
close to blood capillaries gives a short diffusion distance
Which one of the following maintains a low concentration of oxygen in blood capillaries, to maintain a concentration gradient?
respiration
ventilation
circulation
evaporation
Which of the following is/are true of Type 1 pneumocytes?
They are thin and permeable cells
They secrete a chemical called surfactant
There is a single layer of these cells in alveoli walls
They help to dissolve gases
Which of the following is/are true of Type 2 pneumocytes?
The surfactant that they secrete increases surface tension
They prevent the sides of alveoli from sticking together
They help gases to dissolve
They are found on the inner surface of alveoli
Which of the following is/are true of the lung disease emphysema?
It is caused by bacteria
Damaged cells release trypsin enzyme
Elastic fibres in alveoli membranes are digested
Alveoli walls break down
Which of the following is/are true of the lung disease emphysema?
The diffusion distance between alveoli and blood increases
Alveoli become larger
Cilia are damaged so less bacteria can enter the lungs
Alveoli cannot recoil as easily
What is the main reason for placing an oxygen mask on a patient, who has a severe lung disease?
It makes them feel less tired
It increases the concentration gradient for oxygen between the alveoli and blood capillaries
It allows aerobic respiration to occur
It allows oxygen to diffuse faster into the alveoli from blood capillaries
Which of the following muscles relax during inhaling?
A only
B only
A and C
B and C|
Which of the following muscles relax during exhaling?
A only
B only
A and C
B and C
Which of the following is/are reason(s) that alveoli are adapted for fast gas exchange?
thin cell membrane
many large sacs create a large surface area
impermeable walls
close to blood capillaries
Which of the following muscles contract during forced exhalation?
diaphragm
internal intercostals
abdominal
biceps
Emphysema is a lung disease in which the walls of the alveoli lose elastic tissue.
Which of the following would be true of this condition?
inhaling would be more difficult than exhaling
exhaling would be more difficult than inhaling
inhaling and exhaling would be equally affected
alveoli would contain a higher concentration of CO2, so gas exchange would be less efficient
Which one of the following maintains a high concentration of oxygen in the alveoli, to maintain a concentration gradient?
respiration
ventilation
circulation
evaporation
Which of the following lung diseases is always caused by a pathogen?
tuberculosis
emphysema
cystic fibrosis
asthma
The (a) muscle contracts during inhalation and separates the thoracic (chest) and abdominal (stomach) cavities.
At the alveoli, ventilation and circulation help to maintain a ____________ __________.
(a)
