NURS242 Exam 3 2025/2026 Exam
Questions and Verified Answers |
Already Graded A+
What is ventilation? - 🧠 ANSWER ✔✔the movement of air into and out of the
lungs
What is perfusion? - 🧠 ANSWER ✔✔the circulation of blood through the lungs
What are central chemoreceptors responsive to? - 🧠 ANSWER ✔✔increased H+ in
the brain ECF;
increased PaCO2;
"hypercarbic drive"
What are peripheral chemoreceptors responsive to? - 🧠 ANSWER ✔✔decreased
pH;
increased PaCO2;
decreased PaO2;
"hypoxic drive"
COPYRIGHT©NINJANERD 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435.
TERMS OF USE. PRIVACY STATEMENT. ALL RIGHTS RESERVED 1
,What are elastic forces? - 🧠 ANSWER ✔✔lungs recoil due to elastin, collagen,
fibrin
What are surface forces? - 🧠 ANSWER ✔✔surface tension due to water-air
interface
What is airway resistance? - 🧠 ANSWER ✔✔opposition to flow caused by the
forces of friction; primarily determined by airway radius
What is the distensibility of the lungs? - 🧠 ANSWER ✔✔ease with which the lungs
can be inflated
What is lung distensibility increased in? - 🧠 ANSWER ✔✔neonates and children;
emphysema
What is lung distensibility decreased in? - 🧠 ANSWER ✔✔elderly;
pneumonia, pulmonary edema, ARDS, atelectasis, fibrosis
What is surfactant? - 🧠 ANSWER ✔✔complex substance lining the alveoli and
smallest bronchioles containing phospholipids and a number of apoproteins which
reduces surface tension throughout the lungs, thereby contributing to its general
compliance;
stabilizes the alveoli and keeps them dry
COPYRIGHT©NINJANERD 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435.
TERMS OF USE. PRIVACY STATEMENT. ALL RIGHTS RESERVED 2
,What produces surfactant? - 🧠 ANSWER ✔✔produced by the Type II alveolar
cells
What is Ohm's law? - 🧠 ANSWER ✔✔velocity = driving force/resistance
What is Poiseuille law? - 🧠 ANSWER ✔✔resistance = (8 x viscosity x length) / (pi
x radius^4)
What happens if the radius in the lungs goes down? - 🧠 ANSWER ✔✔the
resistance goes up
How is the ventilation distributed in the lungs? - 🧠 ANSWER ✔✔the top of the
lungs are more distended and less compliant whereas the lower lung is small and
highly compliant
What factors affect lung perfusion? - 🧠 ANSWER ✔✔lung capacitance;
low resistance system;
flow influenced by gravity;
resistance primarily determined by vessel radius
What does hypoxia lead to? - 🧠 ANSWER ✔✔vasoconstriction of pulmonary
vessels
COPYRIGHT©NINJANERD 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435.
TERMS OF USE. PRIVACY STATEMENT. ALL RIGHTS RESERVED 3
, What does prolonged hypoxia lead to? - 🧠 ANSWER ✔✔pulmonary hypertension
What factors affect alveolar-capillary diffusion? - 🧠 ANSWER ✔✔capillary
permeability;
surface area available for diffusion;
concentration gradient for the gas;
distance for diffusion
What causes right shifts (decreased affinity) in Hemoglobin-O2 affinity? - 🧠
ANSWER ✔✔acidemia;
hyperthermia;
hypercarbia
What causes left shifts (increased affinity) in Hemoglobin-O2 affinity? - 🧠
ANSWER ✔✔alkalemia;
hypothermia;
hypocarbia
What is hypoxemia? - 🧠 ANSWER ✔✔deficient blood oxygen;
low PaO2;
COPYRIGHT©NINJANERD 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435.
TERMS OF USE. PRIVACY STATEMENT. ALL RIGHTS RESERVED 4
Questions and Verified Answers |
Already Graded A+
What is ventilation? - 🧠 ANSWER ✔✔the movement of air into and out of the
lungs
What is perfusion? - 🧠 ANSWER ✔✔the circulation of blood through the lungs
What are central chemoreceptors responsive to? - 🧠 ANSWER ✔✔increased H+ in
the brain ECF;
increased PaCO2;
"hypercarbic drive"
What are peripheral chemoreceptors responsive to? - 🧠 ANSWER ✔✔decreased
pH;
increased PaCO2;
decreased PaO2;
"hypoxic drive"
COPYRIGHT©NINJANERD 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435.
TERMS OF USE. PRIVACY STATEMENT. ALL RIGHTS RESERVED 1
,What are elastic forces? - 🧠 ANSWER ✔✔lungs recoil due to elastin, collagen,
fibrin
What are surface forces? - 🧠 ANSWER ✔✔surface tension due to water-air
interface
What is airway resistance? - 🧠 ANSWER ✔✔opposition to flow caused by the
forces of friction; primarily determined by airway radius
What is the distensibility of the lungs? - 🧠 ANSWER ✔✔ease with which the lungs
can be inflated
What is lung distensibility increased in? - 🧠 ANSWER ✔✔neonates and children;
emphysema
What is lung distensibility decreased in? - 🧠 ANSWER ✔✔elderly;
pneumonia, pulmonary edema, ARDS, atelectasis, fibrosis
What is surfactant? - 🧠 ANSWER ✔✔complex substance lining the alveoli and
smallest bronchioles containing phospholipids and a number of apoproteins which
reduces surface tension throughout the lungs, thereby contributing to its general
compliance;
stabilizes the alveoli and keeps them dry
COPYRIGHT©NINJANERD 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435.
TERMS OF USE. PRIVACY STATEMENT. ALL RIGHTS RESERVED 2
,What produces surfactant? - 🧠 ANSWER ✔✔produced by the Type II alveolar
cells
What is Ohm's law? - 🧠 ANSWER ✔✔velocity = driving force/resistance
What is Poiseuille law? - 🧠 ANSWER ✔✔resistance = (8 x viscosity x length) / (pi
x radius^4)
What happens if the radius in the lungs goes down? - 🧠 ANSWER ✔✔the
resistance goes up
How is the ventilation distributed in the lungs? - 🧠 ANSWER ✔✔the top of the
lungs are more distended and less compliant whereas the lower lung is small and
highly compliant
What factors affect lung perfusion? - 🧠 ANSWER ✔✔lung capacitance;
low resistance system;
flow influenced by gravity;
resistance primarily determined by vessel radius
What does hypoxia lead to? - 🧠 ANSWER ✔✔vasoconstriction of pulmonary
vessels
COPYRIGHT©NINJANERD 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435.
TERMS OF USE. PRIVACY STATEMENT. ALL RIGHTS RESERVED 3
, What does prolonged hypoxia lead to? - 🧠 ANSWER ✔✔pulmonary hypertension
What factors affect alveolar-capillary diffusion? - 🧠 ANSWER ✔✔capillary
permeability;
surface area available for diffusion;
concentration gradient for the gas;
distance for diffusion
What causes right shifts (decreased affinity) in Hemoglobin-O2 affinity? - 🧠
ANSWER ✔✔acidemia;
hyperthermia;
hypercarbia
What causes left shifts (increased affinity) in Hemoglobin-O2 affinity? - 🧠
ANSWER ✔✔alkalemia;
hypothermia;
hypocarbia
What is hypoxemia? - 🧠 ANSWER ✔✔deficient blood oxygen;
low PaO2;
COPYRIGHT©NINJANERD 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435.
TERMS OF USE. PRIVACY STATEMENT. ALL RIGHTS RESERVED 4
