NR 283 Exam 1 Week 1: (Latest 2026/2027 Update) Pathophysiology
Foundations, Cellular Adaptation, Fluids & Electrolytes, Acid-Base Balance |
Q&A | Grade A | 100% Correct (Verified Answers) – Chamberlain
PATHOPHYSIOLOGY FOUNDATIONS REVIEW
SUBJECT SOURCE FORMAT
Pathophysiology / Cellular Biology / NR 283 Exam 1 Week 1 2026/2027 Q&A Guide with Clinical Rationale
Fluid & Electrolytes
Q1
What is the definition of osmosis?
CORRECT ANSWER Movement of water across a semi-permeable membrane
CLINICAL RATIONALE
● Osmosis moves water from low solute concentration to high solute concentration.
● Critical for fluid balance between intracellular and extracellular compartments.
● Sodium and albumin are primary water attractors (osmotic pressure).
Q2
What is osmotic pressure?
CORRECT ANSWER The force that attracts water across a semi-permeable membrane
CLINICAL RATIONALE
● Osmotic pressure pulls water toward higher solute concentration (e.g., sodium, albumin).
● Maintains fluid distribution between intravascular and interstitial spaces.
● Low osmotic pressure contributes to edema.
Q3
Where does the Krebs cycle take place?
CORRECT ANSWER Mitochondria
CLINICAL RATIONALE
● The Krebs cycle (citric acid cycle) occurs in the mitochondrial matrix.
● Aerobic respiration produces large amounts of ATP with no byproducts.
● Anaerobic respiration produces only 2 ATP with pyruvic acid and lactic acid byproducts.
, Q4
What is the function of the Na+K+ pump?
CORRECT ANSWER Uses ATP to keep K+ inside cell and Na+ outside cell to create resting potential
(2:3 ratio)
CLINICAL RATIONALE
● The Na+K+ pump maintains resting membrane potential for nerve and muscle function.
● Pumps 3 Na+ out and 2 K+ in using active transport (ATP required).
● Without this pump, sodium accumulates inside, water rushes in, and cells burst.
Q5
What is the difference between pathophysiology and pathogenesis?
CORRECT ANSWERPathophysiology is the study of how disease processes affect normal body
function; Pathogenesis is the disease process from start to finish
CLINICAL RATIONALE
● Pathophysiology explains functional changes caused by disease.
● Pathogenesis describes the sequence of events from initial cause to disease resolution.
● Both help guide diagnosis, treatment, and prevention strategies.
Q6
What is homeostasis and how is it maintained?
CORRECT ANSWERA tendency to maintain balanced or constant internal state (equilibrium); uses
osmosis and diffusion
CLINICAL RATIONALE
● Homeostasis regulates blood pressure, body temperature, fluid balance, and pH.
● Disruption of homeostasis leads to disease or death.
● Negative feedback mechanisms restore normal function.
Q7
What is the difference between subjective and objective clinical manifestations?
CORRECT ANSWER Subjective = symptoms (what patient says, e.g., headache, pain, nausea);
Objective = signs (what you can see, e.g., vitals)
CLINICAL RATIONALE
● Subjective data comes from patient report and cannot be measured directly.
● Objective data is measurable (vital signs, lab values, physical exam findings).
● Both are essential for accurate diagnosis and treatment planning.
Foundations, Cellular Adaptation, Fluids & Electrolytes, Acid-Base Balance |
Q&A | Grade A | 100% Correct (Verified Answers) – Chamberlain
PATHOPHYSIOLOGY FOUNDATIONS REVIEW
SUBJECT SOURCE FORMAT
Pathophysiology / Cellular Biology / NR 283 Exam 1 Week 1 2026/2027 Q&A Guide with Clinical Rationale
Fluid & Electrolytes
Q1
What is the definition of osmosis?
CORRECT ANSWER Movement of water across a semi-permeable membrane
CLINICAL RATIONALE
● Osmosis moves water from low solute concentration to high solute concentration.
● Critical for fluid balance between intracellular and extracellular compartments.
● Sodium and albumin are primary water attractors (osmotic pressure).
Q2
What is osmotic pressure?
CORRECT ANSWER The force that attracts water across a semi-permeable membrane
CLINICAL RATIONALE
● Osmotic pressure pulls water toward higher solute concentration (e.g., sodium, albumin).
● Maintains fluid distribution between intravascular and interstitial spaces.
● Low osmotic pressure contributes to edema.
Q3
Where does the Krebs cycle take place?
CORRECT ANSWER Mitochondria
CLINICAL RATIONALE
● The Krebs cycle (citric acid cycle) occurs in the mitochondrial matrix.
● Aerobic respiration produces large amounts of ATP with no byproducts.
● Anaerobic respiration produces only 2 ATP with pyruvic acid and lactic acid byproducts.
, Q4
What is the function of the Na+K+ pump?
CORRECT ANSWER Uses ATP to keep K+ inside cell and Na+ outside cell to create resting potential
(2:3 ratio)
CLINICAL RATIONALE
● The Na+K+ pump maintains resting membrane potential for nerve and muscle function.
● Pumps 3 Na+ out and 2 K+ in using active transport (ATP required).
● Without this pump, sodium accumulates inside, water rushes in, and cells burst.
Q5
What is the difference between pathophysiology and pathogenesis?
CORRECT ANSWERPathophysiology is the study of how disease processes affect normal body
function; Pathogenesis is the disease process from start to finish
CLINICAL RATIONALE
● Pathophysiology explains functional changes caused by disease.
● Pathogenesis describes the sequence of events from initial cause to disease resolution.
● Both help guide diagnosis, treatment, and prevention strategies.
Q6
What is homeostasis and how is it maintained?
CORRECT ANSWERA tendency to maintain balanced or constant internal state (equilibrium); uses
osmosis and diffusion
CLINICAL RATIONALE
● Homeostasis regulates blood pressure, body temperature, fluid balance, and pH.
● Disruption of homeostasis leads to disease or death.
● Negative feedback mechanisms restore normal function.
Q7
What is the difference between subjective and objective clinical manifestations?
CORRECT ANSWER Subjective = symptoms (what patient says, e.g., headache, pain, nausea);
Objective = signs (what you can see, e.g., vitals)
CLINICAL RATIONALE
● Subjective data comes from patient report and cannot be measured directly.
● Objective data is measurable (vital signs, lab values, physical exam findings).
● Both are essential for accurate diagnosis and treatment planning.
