Applied Pathophysiology for the Advanced Practice
Nurse, 2nd Edition
Comprehensive Exam with 200 Questions with
Answers and Rationales latest update 2026/2027
Chapter 1: Cellular Function
1. The nucleus is essential for cell function and survival because it:
A) Is the site of protein synthesis
B) Contains the genetic code
C) Transforms cellular energy
D) Initiates aerobic metabolism
Answer: B
Rationale: The nucleus houses the cell's genetic material (DNA) and directs cellular activities
through gene expression. Protein synthesis occurs at ribosomes, energy transformation occurs
in mitochondria, and aerobic metabolism is primarily a mitochondrial function.
2. Although energy is not made in mitochondria, they are known as the "power plants" of the
cell because they:
A) Contain RNA for protein synthesis
B) Utilize glycolysis for oxidative energy
C) Extract energy from organic compounds
D) Store calcium bonds for muscle contractions
,Answer: C
Rationale: Mitochondria extract energy from organic compounds through oxidative
phosphorylation, producing ATP. They do not contain RNA for protein synthesis; ribosomes do.
Glycolysis occurs in the cytoplasm, and calcium storage is a function of the smooth endoplasmic
reticulum.
3. Although the basic structure of the cell plasma membrane is formed by a lipid bilayer, most
of the specific membrane functions are carried out by:
A) Bound and transmembrane proteins
B) Complex, long carbohydrate chains
C) Surface antigens and hormone receptors
D) A gating system of selective ion channels
Answer: A
Rationale: Membrane proteins serve as receptors, channels, transporters, and enzymes that
carry out the specific functions of the plasma membrane. Carbohydrate chains serve in cell
recognition, while ion channels are only one type of membrane protein function.
4. To effectively relay signals, cell-to-cell communication utilizes chemical messenger systems
that:
A) Displace surface receptor proteins
B) Accumulate within cell gap junctions
C) Bind to contractile microfilaments
D) Release secretions into extracellular fluid
Answer: D
,Rationale: Chemical messengers are secreted into the extracellular fluid to communicate with
neighboring or distant cells. They do not displace receptor proteins or accumulate in gap
junctions.
5. Aerobic metabolism, also known as oxidative metabolism, provides energy by:
A) Removing the phosphate bonds from ATP
B) Combining hydrogen and oxygen to form water
C) Activating pyruvate stored in the cytoplasm
D) Breaking down glucose to form lactic acid
Answer: B
Rationale: Aerobic metabolism involves the electron transport chain, where hydrogen combines
with oxygen to form water, producing ATP. Removing phosphate bonds from ATP releases
energy rather than produces it, and lactic acid formation occurs in anaerobic metabolism.
6. Exocytosis, the reverse of endocytosis, is important in ______ into the extracellular fluid.
A) Engulfing and ingesting fluid and proteins for transport
B) Killing, degrading, and dissolving harmful microorganisms
C) Removing cellular debris and releasing synthesized substances
D) Destruction of particles by lysosomal enzymes for secretion
Answer: C
Rationale: Exocytosis involves the removal of cellular debris and the release of synthesized
substances (such as hormones and neurotransmitters) into the extracellular fluid. Engulfing and
ingesting describe endocytosis, and killing microorganisms is a function of lysosomes.
, 7. The process responsible for generating and conducting membrane potentials is:
A) Diffusion of current-carrying ions
B) Millivoltage of electrical potential
C) Polarization of charged particles
D) Ion channel neurotransmission
Answer: A
Rationale: Membrane potentials are generated and conducted by the diffusion of current-
carrying ions across the cell membrane. Polarization is the state of the membrane, not the
process generating the potential.
8. Protein hormones and enzymes are stored in the __________, awaiting signals to be released
into the cell.
A) Food vacuole
B) Golgi complex
C) Rough endoplasmic reticulum
D) Secretory vesicles
Answer: D
Rationale: Secretory vesicles are membrane-bound organelles that store protein hormones and
enzymes until specific signals trigger their release via exocytosis. The Golgi complex packages
these proteins into vesicles but does not serve as the primary storage site.
9. Low serum albumin levels (hypoalbuminemia) can cause edema because:
A) Oncotic pressure increases
B) Oncotic pressure decreases
Nurse, 2nd Edition
Comprehensive Exam with 200 Questions with
Answers and Rationales latest update 2026/2027
Chapter 1: Cellular Function
1. The nucleus is essential for cell function and survival because it:
A) Is the site of protein synthesis
B) Contains the genetic code
C) Transforms cellular energy
D) Initiates aerobic metabolism
Answer: B
Rationale: The nucleus houses the cell's genetic material (DNA) and directs cellular activities
through gene expression. Protein synthesis occurs at ribosomes, energy transformation occurs
in mitochondria, and aerobic metabolism is primarily a mitochondrial function.
2. Although energy is not made in mitochondria, they are known as the "power plants" of the
cell because they:
A) Contain RNA for protein synthesis
B) Utilize glycolysis for oxidative energy
C) Extract energy from organic compounds
D) Store calcium bonds for muscle contractions
,Answer: C
Rationale: Mitochondria extract energy from organic compounds through oxidative
phosphorylation, producing ATP. They do not contain RNA for protein synthesis; ribosomes do.
Glycolysis occurs in the cytoplasm, and calcium storage is a function of the smooth endoplasmic
reticulum.
3. Although the basic structure of the cell plasma membrane is formed by a lipid bilayer, most
of the specific membrane functions are carried out by:
A) Bound and transmembrane proteins
B) Complex, long carbohydrate chains
C) Surface antigens and hormone receptors
D) A gating system of selective ion channels
Answer: A
Rationale: Membrane proteins serve as receptors, channels, transporters, and enzymes that
carry out the specific functions of the plasma membrane. Carbohydrate chains serve in cell
recognition, while ion channels are only one type of membrane protein function.
4. To effectively relay signals, cell-to-cell communication utilizes chemical messenger systems
that:
A) Displace surface receptor proteins
B) Accumulate within cell gap junctions
C) Bind to contractile microfilaments
D) Release secretions into extracellular fluid
Answer: D
,Rationale: Chemical messengers are secreted into the extracellular fluid to communicate with
neighboring or distant cells. They do not displace receptor proteins or accumulate in gap
junctions.
5. Aerobic metabolism, also known as oxidative metabolism, provides energy by:
A) Removing the phosphate bonds from ATP
B) Combining hydrogen and oxygen to form water
C) Activating pyruvate stored in the cytoplasm
D) Breaking down glucose to form lactic acid
Answer: B
Rationale: Aerobic metabolism involves the electron transport chain, where hydrogen combines
with oxygen to form water, producing ATP. Removing phosphate bonds from ATP releases
energy rather than produces it, and lactic acid formation occurs in anaerobic metabolism.
6. Exocytosis, the reverse of endocytosis, is important in ______ into the extracellular fluid.
A) Engulfing and ingesting fluid and proteins for transport
B) Killing, degrading, and dissolving harmful microorganisms
C) Removing cellular debris and releasing synthesized substances
D) Destruction of particles by lysosomal enzymes for secretion
Answer: C
Rationale: Exocytosis involves the removal of cellular debris and the release of synthesized
substances (such as hormones and neurotransmitters) into the extracellular fluid. Engulfing and
ingesting describe endocytosis, and killing microorganisms is a function of lysosomes.
, 7. The process responsible for generating and conducting membrane potentials is:
A) Diffusion of current-carrying ions
B) Millivoltage of electrical potential
C) Polarization of charged particles
D) Ion channel neurotransmission
Answer: A
Rationale: Membrane potentials are generated and conducted by the diffusion of current-
carrying ions across the cell membrane. Polarization is the state of the membrane, not the
process generating the potential.
8. Protein hormones and enzymes are stored in the __________, awaiting signals to be released
into the cell.
A) Food vacuole
B) Golgi complex
C) Rough endoplasmic reticulum
D) Secretory vesicles
Answer: D
Rationale: Secretory vesicles are membrane-bound organelles that store protein hormones and
enzymes until specific signals trigger their release via exocytosis. The Golgi complex packages
these proteins into vesicles but does not serve as the primary storage site.
9. Low serum albumin levels (hypoalbuminemia) can cause edema because:
A) Oncotic pressure increases
B) Oncotic pressure decreases
