ATI TEAS, ATI TEAS: SCIENCE 800
ACTUAL EXAM QUESTIONS AND
CEXPERT VERIFIED ANSWERS 2026
EXAM GRADED A+
What does the respiratory system do? - ANSWER- Brings in oxygen to
go into the cells, and picks up carbon dioxide to be removed from
the bodyguard
What are the 7 parts of the respiratory system? - ANSWER- 1. Nose
2. Pharynx
3. Larynx (voice box)
4. Trachea (windpipe)
5. Bronchi
6. Bronchioles
7. Alveoli
,What are alveoli surrounded by to allow the exchange of O2 and CO2? -
ANSWER- Capillaries
What is cilia? - ANSWER- Tiny hairs in the nose and trachea that
wave particles up away and out
What is mucus? - ANSWER- Something that keeps the air warm and
moist but also traps particles
How many alveoli does each lung have? - ANSWER- 150 million
What does hemoglobin do? - ANSWER- Carries oxygen through the
blood
What is pleura? - ANSWER- Sacs that surround the lungs
What is the diaphragm? - ANSWER- The muscle at the bottom of the
thoracic cavity
What happens during inhalation? - ANSWER- Diaphragm moves
down (contracts), rib cage rises, volume of chest cavity increases, air
moves in to fill the space
What happens during exhalation? - ANSWER- Diaphragm moves up
(relaxes), rib cage lowers, space becomes smaller, air is pushed out
of lungs
,What does the medulla oblongata do? - ANSWER- Controls breathing
What is chronic bronchitis? - ANSWER- Bronchi swell and become
clogged with mucus
What is emphysema? - ANSWER- Tissues in lungs lose elasticity;
tissues can't enough O2 or get rid of enough CO2
What is lung cancer? - ANSWER- Cells that do not stop reproducing;
can spread to other locations because lungs are so central and
connected to so much; survival is generally less then 5 years from
diagnosis
What is heart disease? - ANSWER- Blood vessels are constricted,
blood pressure rises, heart has to work harder, heart wears out
more quickly
What is cystic fibrosis? - ANSWER- Genetic (recessive); lungs can
get clogged with mucous
What is mesothelioma? - ANSWER- Lungs become exposed to
asbestos and lose elasticity
, What is elastic recoil? - ANSWER- The ability for the alveoli to get
filled with air then return to their normal shape once the air is
released
What is a spirometer? - ANSWER- an instrument for measuring the air
capacity of the lungs
What is tidal volume? - ANSWER- The amount of air taken in and
breathed out in a typical breath
What is supplemental volume? - ANSWER- The xtra air that can be
inhaled or exhaled with a deep breath
What is reserve amount? - ANSWER- The amount of extra air you can
breathe out when you force air out of your lungs
What is residual amount? - ANSWER- The amount of air in your lungs
that you cannot get rid of (even during forced exhaling)
What is vital capacity? - ANSWER- All the air you can control going in
or out of your lungs (supplemental + reserve = vital)
What is total capacity? - ANSWER- From the top of your supplemental
amount to the bottom of your residual volume
ACTUAL EXAM QUESTIONS AND
CEXPERT VERIFIED ANSWERS 2026
EXAM GRADED A+
What does the respiratory system do? - ANSWER- Brings in oxygen to
go into the cells, and picks up carbon dioxide to be removed from
the bodyguard
What are the 7 parts of the respiratory system? - ANSWER- 1. Nose
2. Pharynx
3. Larynx (voice box)
4. Trachea (windpipe)
5. Bronchi
6. Bronchioles
7. Alveoli
,What are alveoli surrounded by to allow the exchange of O2 and CO2? -
ANSWER- Capillaries
What is cilia? - ANSWER- Tiny hairs in the nose and trachea that
wave particles up away and out
What is mucus? - ANSWER- Something that keeps the air warm and
moist but also traps particles
How many alveoli does each lung have? - ANSWER- 150 million
What does hemoglobin do? - ANSWER- Carries oxygen through the
blood
What is pleura? - ANSWER- Sacs that surround the lungs
What is the diaphragm? - ANSWER- The muscle at the bottom of the
thoracic cavity
What happens during inhalation? - ANSWER- Diaphragm moves
down (contracts), rib cage rises, volume of chest cavity increases, air
moves in to fill the space
What happens during exhalation? - ANSWER- Diaphragm moves up
(relaxes), rib cage lowers, space becomes smaller, air is pushed out
of lungs
,What does the medulla oblongata do? - ANSWER- Controls breathing
What is chronic bronchitis? - ANSWER- Bronchi swell and become
clogged with mucus
What is emphysema? - ANSWER- Tissues in lungs lose elasticity;
tissues can't enough O2 or get rid of enough CO2
What is lung cancer? - ANSWER- Cells that do not stop reproducing;
can spread to other locations because lungs are so central and
connected to so much; survival is generally less then 5 years from
diagnosis
What is heart disease? - ANSWER- Blood vessels are constricted,
blood pressure rises, heart has to work harder, heart wears out
more quickly
What is cystic fibrosis? - ANSWER- Genetic (recessive); lungs can
get clogged with mucous
What is mesothelioma? - ANSWER- Lungs become exposed to
asbestos and lose elasticity
, What is elastic recoil? - ANSWER- The ability for the alveoli to get
filled with air then return to their normal shape once the air is
released
What is a spirometer? - ANSWER- an instrument for measuring the air
capacity of the lungs
What is tidal volume? - ANSWER- The amount of air taken in and
breathed out in a typical breath
What is supplemental volume? - ANSWER- The xtra air that can be
inhaled or exhaled with a deep breath
What is reserve amount? - ANSWER- The amount of extra air you can
breathe out when you force air out of your lungs
What is residual amount? - ANSWER- The amount of air in your lungs
that you cannot get rid of (even during forced exhaling)
What is vital capacity? - ANSWER- All the air you can control going in
or out of your lungs (supplemental + reserve = vital)
What is total capacity? - ANSWER- From the top of your supplemental
amount to the bottom of your residual volume
