WorksheetsRESPIRATORY SYSTEM
Total questions: 22
Worksheet time: 10mins
Which structures filter and moisten air as it passes through the human respiratory system?
cilia and mucous membranes
alveoli and cartilage rings
diaphragm and bronchioles
epiglottis and bronchi
Which respiratory structure is supported by rings of cartilage?
trachea
alveolus
bronchiole
pharynx
Which sequence correctly indicates the branching pattern of the human respiratory system?
trachea -> bronchi -> bronchioles -> alveoli
trachea -> bronchioles -> bronchi -> alveoli
alveoli -> trachea -> bronchioles -> bronchi
alveoli -> bronchioles -> trachea -> bronchi
Which structure in humans is lined with ciliated mucous membrane, is supported by cartilaginous rings, and functions as a passageway for air?
esophagus
alveolus
pharynx
trachea
Which statement best describes the function of the respiratory passageways of a human?
They permit digestive end-products to make contact with body cells.
They permit exchange between the external atmosphere and the circulatory system.
They transport gaseous cellular wastes from body cells to the lungs for excretion.
They regulate the amount of ammonia and salt dissolved in body fluids.
In humans, which structure prevents food from entering the trachea?
epiglottis
alveolus
mucous membrane
cartilage ring
The cellular process which uses oxygen and sugar to produce energy is called
photosynthesis
cell division
cellular respiration
DNA replication
What is the main function of gas exchange
To remove carbon dioxide and supply oxygen to the body
To remove oxygen from the body
To supply carbon dioxide and remove oxygen from the body
To supply water to the body cells
Which diagram best illustrates the function of an alveolus?
Which structure shown in the diagram below contracts, causing a pressure change in the chest cavity during breathing?
A
B
C
D
An increase in breathing rate can be triggered by an increase in the
carbon dioxide content of the blood
oxygen content of the atmosphere
number of platelets in the blood
number of red blood cells
Which part of the human respiratory system is a thin, moist membranous structure where gas exchange occurs?
trachea
bronchus
epiglottis
alveolus
Which part of the human respiratory system is correctly paired with a description of its structure?
alveolus – microscopic sac containing rings of cartilage and ciliated membranes
pharynx – cavity lined with flagellated mucous membranes
bronchiole – small branching tubule lacking cartilaginous rings
trachea – thin, moist membrane surrounded by capillaries
In the human respiratory system, bronchioles directly connect the
trachea and pharynx
bronchi and alveoli
nasal cavity and trachea
epiglottis and larynx
In humans, the thin, moist membranes of the alveoli are surrounded by
bronchi
the epiglottis
capillaries
lymph vessels
The diagram below represents a demonstration of the breathing process in humans. The balloons represent lungs.
The change in the balloons is brought about by
a change in air composition outside the bell jar
a change in air pressure inside the bell jar
an expansion of the balloons, which pulls the rubber sheet into the bell jar
a contraction of the balloons, which forces air into the bell jar
In humans, what happens when the breathing rate increases?
Additional oxygen will diffuse into the blood as carbon dioxide diffuses out of the blood in the lungs.
Additional carbon dioxide will diffuse into the blood as oxygen diffuses out of the blood in the lungs.
Oxygen from body cells will diffuse more rapidly into red blood cells.
Increased oxygen dissolved in the blood will stimulate the cerebrum to slow the breathing rate.
Which human organ is correctly paired with its functional subunits?
lung—alveoli
kidney—neurons
brain—nephrons
liver—ureters
A man develops a severe infection in his lungs. This would impact the man's ability to
digest food
transport nutrients throughout the body
absorb oxygen and expel carbon dioxide
produce sex cells
An allergic reaction characterized by the constriction of the bronchial tubes is known as
coronary thrombosis
arthritis
asthma
emphysema
Which disease is linked to smoking and results in a reduction in the number and elasticity of alveoli?
emphysema
asthma
bronchitis
meningitis
Smoking may damage the respiratory system because deposits from the smoke can
interfere with ciliary action in the trachea
trigger the release of antigens by the alveoli
block the transmission of impulses that regulate breathing
lower blood pressure in the mucous membranes of the bronchioles
