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Bio 669 Quiz 5 Questions And Answers With100% Verified Solution Latest Update 2024/2025.
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Bio 669 Quiz 5 Questions And Answers With100% Verified Solution Latest Update 2024/2025.
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Bio 669 Quiz 5 Questions And Answers With100%Verified Solution Latest Update 2024/2025.
What is the conducting airways? - ANSWER The mechanical act of having airflow into and out
of the alveoli and respiratory bronchioles.
Do not participate in gas exchange
Components: the nasopharynx, oropharynx, larynx, trachea, bronchi, and nonrespiratory bronchioles.
What is respiratory airways? - ANSWER Actual exchange of oxygen and carbon dioxide across
the membrane
Components: Respiratory bronchioles, alveolar ducts and alveoli
what are type 1 alveolar cells? - ANSWER structural- help allow for exchange across the
membrane
what are type 2 alveolar cells? - ANSWER surfactant producers
What does surfactant do? - ANSWER protein that reduces surface tension inside the alveolar
or respiratory membrane.
helps to interfere with the hydrogen bond (what makes things tighter) and loosen it so that the alveoli
can inflate
what happens to the pulmonary artery during acidemia? - ANSWER The pulmonary artery
constricts.
How many of the pulmonary veins are filled with blood? - ANSWER 1/3
why does the pulmonary artery constrict during acidemia? - ANSWER constricts to reduce
blood flow to an area that has CO2 build-up
What is the alveolocapillary membrane? - ANSWER It is formed by shared alveolar and
capillary walls, structures include the thin membrane of alveolar epithelium, alveolar basement
membrane, interstitial space, capillary basement membrane, and capillary endothelium.
the wall that oxygen and CO2 have to cross for respiration to occur
, what does the caliber of the pulmonary artery mean? - ANSWER the radius
what happens to the pressure in the thoracic cavity as your chest expands? - ANSWER the
pressure of the thoracic cavity drops causing inspiration (Air going in)
what direction does air go in regard to pressure? - ANSWER from high pressure to low
pressure, like fluid
what is the visceral layer connected to? - ANSWER it is connected to the lungs
what is the parietal layer connected to? - ANSWER it is connected to the chest wall
What does pleural fluid do? - ANSWER it connects the parietal and the visceral layer and helps
to reduce friction
what is the function of the pulmonary system? - ANSWER ventilate the alveoli, diffuse gases
into and out of the blood (respiration), perfuse the lungs with blood so the body receives oxygen
What does a spirometer do? - ANSWER measures volume of air that we are able to control
What is vital capacity? - ANSWER the greatest volume of air that can be expelled from the
lungs after taking the deepest possible breath.
What is tidal volume? - ANSWER the amount of air you move in and out during quiet
breathing
What is inspiratory reserve volume? - ANSWER additional inspired air over and above tidal
volume
What is expiratory reserve volume? - ANSWER volume of air in excess of tidal volume that can
be exhaled forcibly
What is residual volume? - ANSWER Air in lungs after maximal expiration that we are not able
to fully eliminate.
Cannot be measured on spirometry
what is functional residual capacity? - ANSWER Combined residual and expiratory reserve
volumes (ERV + RV)
the equilibrium point of lungs wanting to collapse and chest wall wanting to expand.
what happens with a disease state like COPD and emphysema, when addition air is trapped in the
lungs? - ANSWER the residual volume increases, causing the other volumes to increase,
reducing inspiratory reserve volume
resets where lung and chest wall come to the equilibrium of not having to overwork to expand or
contract
What is ventilation? - ANSWER movement of air in and out of the lungs
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