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WorksheetsGas exchnge etc
Total questions: 21
Worksheet time: 21mins
State which of these is the waste gas that is expelled from the body during exhalation.
Sulfur Dioxide
Oxygen
Carbon Monoxide
Carbon Dioxide
Identify what structure is indicated by the blue arrow in the picture.
Abdomen
Pharynx
Trachea
Vocal Cords
Bronchus
Which of the following causes inspiration.
The diaphragm contracting
The diaphragm relaxing
The internal intercostal muscles contracting
The thorax getting smaller
Which two important features of the alveolar wall are important for gas exchange to occur? Select All correct options.
It is thick
It is thin
It is moist
It is dry
In inhaled air, recall if there is a higher concentration of carbon dioxide or oxygen.
Oxygen
Carbon Dioxide
The diagram below which shows the inner lining of a certain part of the human body. This inner lining can be found in
the trachea.
the air sacs.
the capillaries.
the small intestine.
Which of the following shows the correct sequence of air passage into the lungs?
trachea → larynx → air sacs → bronchi
larynx → trachea → bronchi → air sacs
air sacs → larynx → trachea → bronchi
larynx → bronchi → trachea → air sacs
The lining of the nasal cavity is covered with a thin film of mucus. What is the importance of the mucus?
It warms up the inhaled air.
It helps remove dust from the incoming air.
It lubricates the passage of air into the respiratory trac.
It helps dissolve oxygen in the inhaled air for gas exchange.
What is the rate of breathing of this person at rest?
10 breaths per minute
12 breaths per minute
18 breaths per minute
24 breaths per minute
Which of the following correctly describes the functioning of the human breathing system?
The bronchus cannot change its size.
The nasal cavity has hairs to trap dust.
The diaphragm muscle contracts during inhalation.
The lung expels air through its muscular contraction.
In a fire accident, during which period of time in the following graph would a large amount of hot smoke rush into the lungs?
P to R
Q to S
R to T
S to U
Which of the following are features of the air sacs 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
Which of the following structures is supported by cartilage?
aorta
oesophagus
bronchus
vena cava
When the external intercostal muscles contract, how do the pressure and the volume inside the lungs change?
pressure decreases, volume decreases
pressure decreases, volume increases
pressure increases, volume decreases
pressure increases, volume increases
the diagram shows some cells. Where are these cells found?
alimentary canal
blood
bronchial wall
plant roots
Health is...
feeling on top of your game
exercising regularly
eating a balanced diet and exercising regularly
a state of physical and metal well-being
Most pathogens never enter the body because of your
skin
muscles
skeleton
connective tissues
B cells produce disease killing proteins known as
antibodies
antibiotics
antigens
allergies
