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WorksheetsCh30
Total questions: 20
Worksheet time: 15mins
Which of the following actions increase the volume of your lungs?
The diapphragm flattens and moves downward.
The rib cage becomes smaller.
Air pressure increases inside the lungs
Gases move from areas of lower pressure.
The huge surface area in the lungs were Oxygen is absorbed and Carbon Dioxide is released is in the
trachea
bronchi
alveoli
bronchioles
The blood in veins is
leaving the lungs.
moving in single file.
carrying oxygen.
traveling to the heart.
The arteries and arterioles of the circulatory system transport Oxygen to the
mouth
lungs
cells
heart
Blood is carried to and from the cells of the body by the
arteries
capillaries
muscles
veins
Oxygen inhaled into the alveoli diffuses into the
capillaries
arteries
adjacent alveoli
bronchioles
The Oxygen molecules in the blood bind to an iron-rich protein called
hemoglobin
carbonic acid
uric acid
dissolved gas
The nervous system regulates breathing by
overriding signals during exercise.
monitoring dissolved gases in the blood.
maintaining a constant rate of inhalation.
constricting the blood vessels in the lungs.
How does asthma affect the structures of the lungs?
It causes the bronchioles to constrict.
It destroys alveoli over time.
It makes the lungs produce mucus.
It relaxes the diaphragm too much.
Why does Carbon Dioxide diffuse from the blood into the alveoli?
Carbon Dioxide concentration is higher in the blood than in the alveoli.
The brain signals the alveoli to absorb Carbon Dioxide.
When Oxygen leaves the blood, another gas must replace it.
There is not enough hemoglobin to carry the Carbon Dioxide.
Where does the first contraction of the heartbeat take place?
in the ventricles
in the atrium
in the valves
in the septum
The AV node signals the heart's ventricles to contract, pumping oxygen-poor blood from the right ventricle into the
aorta.
pulmonary vein.
pulmonary artery.
atria.
Which parts of the circulatory system deliver oxygen-rich blood to the rest of the body?
the left ventrical and the pulmonary vein
the left atrium and the capillaries
the atria and the pulmonary artery
the left ventrical and the aorta
Pulmonary circulation occurs only between the heart and the
organs
lungs
brain
limbs
A pulmonary vein differs from most veins in that it carries
twice as much blood.
its own blood supply.
oxygen-rich blood.
more carbon dioxide.
The middle layer of an artery is made of
connective tissue.
endothelium coated with a protein.
smooth muscle and elastic fibers.
valves that keep blood moving.
Circulation is maintained in the veins by the
activity of skeletal muscles.
use of two-way valves.
contraction of elastic fibers.
prevention of clotting.
Materials can diffuse into and out of blood in the capillaries because the capillary
beds are near the heart.
fibers are very elastic.
walls are very thin.
muscles act as pumps.
The diastolic pressure occurs when the
left ventricle relaxes.
right ventricle contracts.
blood rushes into an artery.
systolic pressure is too high.
Permanently high blood pressure is called
stroke
atherosclerosis
hypertension
arteriosclerosis
