WorksheetsBreathing and Gas Exchange
Total questions: 19
Worksheet time: 10mins
When you exhale, the diaphragm
moves upwards
moves downwards
flattens
none of the above
When you breathe, your lungs take in ___ and remove ___.
air/oxygen
oxygen/carbon dioxide
carbon dioxide/waste
waste/air
What is the site of gas exchange?
alveoli
bronchus
nose
trachea
Which of the following are features of the alveoli that adapt them to gas exchange?
I. High surface area
II. Thin walls
III. Dry surfaces
I and II only
I only
II and III
I, II, and III
Given the following structures:
1. alveoli
2. bronchi
3. bronchioles
Which of the following is the correct order in which air would flow after inhalation?
1,2,3
2,1,3
2,3,1
3,2,1
What happens when you breathe in? (tick all that apply)
diaphragm relaxes and moves up
diaphragm contracts and flattens
increases volume in thorax
reduces volume in thorax
What adaptations does the alveoli have for efficient gas exchange?
thick walls
thin walls
small surface area
what is found around alveoli?
capillaries
pleura
lymphatic nodes
saliva
What is sign for brain to send impulse for breathing?
high CO2 level
low CO2 level
high O2 level
high blood concentration
Diaphragm is
part of lungs
muscle that helps in breathing
throat muscle
structure in bones
During gas exchange what enters from alveoli to the capillaries?
CO2
CO
O2
nitrogen
Which of the following is not happening during inhalation?
the diaphragm contracts
the rib cage rises up
expands the volume of the chest cavity
diaphragm is relaxing
