ESTUDYR
ADVANCED PATHOPHYSIOLOGY MIDTERM 6501 WALDEN
UNIVERSITY MOST TESTED QUESTIONS AND ANSWERS
GRADED A+ WITH RATIONALES
1. A runner has depleted all the oxygen available for muscle energy. Which of the following will
facilitate his continued muscle performance?
a) Aerobic respiration
b) Anaerobic glycolysis
c) Oxidative phosphorylation
d) Krebs cycle
Answer: b) Anaerobic glycolysis
Rationale: When oxygen is depleted, muscles rely on anaerobic glycolysis to produce ATP
quickly, though less efficiently.
2. What causes the rapid change in the resting membrane potential that initiates an action
potential?
a) Potassium gates open, and potassium rushes out of the cell
b) Sodium gates open, and sodium rushes into the cell, changing the membrane potential
from negative to positive
c) Calcium gates open, and calcium enters the cell
d) Chloride gates open, and chloride enters the cell
Answer: b) Sodium gates open, and sodium rushes into the cell, changing the membrane
potential from negative to positive
Rationale: The influx of sodium ions depolarizes the cell membrane, initiating an action
potential.
Genetic Disorders
3. A 12-year-old male is diagnosed with Klinefelter syndrome. His karyotype would reveal which
of the following?
a) XO
b) XXY
c) XXX
d) XY
Answer: b) XXY
Rationale: Klinefelter syndrome is characterized by an extra X chromosome in males (47,XXY).
4. A nurse is reviewing a pedigree chart. When checking for a proband, what is the nurse looking
for?
a) The person who carries the gene but does not express the disease
,ESTUDYR
b) The person who is first diagnosed with a genetic disease
c) The person who has the most severe form of the disease
d) The person who is a carrier of the disease
Answer: b) The person who is first diagnosed with a genetic disease
Rationale: The proband is the individual in a family who first brings a genetic disorder to the
attention of medical professionals.
5. An aide asks the nurse why people with neurofibromatosis show varying degrees of the
disease. Which genetic principle should the nurse explain to the aide?
a) Penetrance
b) Expressivity
c) Dominance
d) Recessiveness
Answer: b) Expressivity
Rationale: Expressivity refers to the variation in the severity or manifestation of a genetic
disorder among individuals.
6. A 13-year-old female has a karyotype that reveals an absent homologous X chromosome with
only a single X chromosome present. Her features include short stature, widely spaced
nipples, and sparse body hair. What is her diagnosis?
a) Klinefelter syndrome
b) Turner syndrome
c) Down syndrome
d) Huntington disease
Answer: b) Turner syndrome
Rationale: Turner syndrome is characterized by a 45,X karyotype and features such as short
stature and sparse body hair.
7. A 50-year-old male was recently diagnosed with Huntington disease. Transmission of this
disease is associated with:
a) Autosomal recessive inheritance
b) Delayed age of onset
c) X-linked inheritance
d) Mitochondrial inheritance
Answer: b) Delayed age of onset
Rationale: Huntington disease is an autosomal dominant disorder with symptoms typically
appearing in adulthood.
8. A patient wants to know the risk factors for Down syndrome. What is the nurse's best
response?
a) Advanced paternal age
b) Pregnancy in women over age 35
c) Exposure to radiation during pregnancy
,ESTUDYR
d) Consanguinity
Answer: b) Pregnancy in women over age 35
Rationale: Advanced maternal age is the most significant risk factor for Down syndrome.
Cellular Transport and Metabolism
9. How are potassium and sodium transported across plasma membranes?
a) By simple diffusion
b) By adenosine triphosphate enzyme (ATPase)
c) By facilitated diffusion
d) By osmosis
Answer: b) By adenosine triphosphate enzyme (ATPase)
Rationale: The sodium-potassium pump (ATPase) actively transports sodium out of the cell and
potassium into the cell.
10. The nurse would be correct in identifying the predominant extracellular cation as:
a) Potassium
b) Sodium
c) Calcium
d) Magnesium
Answer: b) Sodium
Rationale: Sodium is the primary extracellular cation, while potassium is the primary
intracellular cation.
11. The early dilation (swelling) of the cell's endoplasmic reticulum results in:
a) Increased protein synthesis
b) Reduced protein synthesis
c) Enhanced DNA replication
d) Increased ATP production
Answer: b) Reduced protein synthesis
Rationale: Swelling of the endoplasmic reticulum disrupts its function, leading to reduced
protein synthesis.
12. Sodium and water accumulation in an injured cell are a direct result of:
a) Increased ATP production
b) Decreased ATP production
c) Enhanced ion transport
d) Increased protein synthesis
Answer: b) Decreased ATP production
Rationale: Reduced ATP impairs the sodium-potassium pump, leading to sodium and water
accumulation.
, ESTUDYR
13. The ion transporter that moves Na+ and Ca2+ simultaneously in the same direction is an
example of which of the following types of transport?
a) Antiport
b) Symport
c) Uniport
d) Passive transport
Answer: b) Symport
Rationale: Symport involves the simultaneous transport of two ions in the same direction.
Thyroid Disorders
14. Hypothyroidism is characterized by:
a) Increased metabolism and weight loss
b) Decreased metabolism and weight gain
c) Heat intolerance and diarrhea
d) Elevated T3 and T4 levels
Answer: b) Decreased metabolism and weight gain
Rationale: Hypothyroidism slows metabolic processes, leading to weight gain and fatigue.
15. Hyperthyroidism is characterized by:
a) Weight gain and constipation
b) Weight loss and diarrhea
c) Cold intolerance and lethargy
d) Decreased heart rate
Answer: b) Weight loss and diarrhea
Rationale: Hyperthyroidism increases metabolic rate, causing weight loss and gastrointestinal
hyperactivity.
16. The brain cannot produce T3 and T4 without:
a) Calcium
b) Iodine
c) Potassium
d) Sodium
Answer: b) Iodine
Rationale: Iodine is essential for the synthesis of thyroid hormones.
17. Which of the following is responsible for regulating calcium levels?
a) Thyroid gland
b) Parathyroid glands
c) Adrenal glands
d) Pituitary gland
ADVANCED PATHOPHYSIOLOGY MIDTERM 6501 WALDEN
UNIVERSITY MOST TESTED QUESTIONS AND ANSWERS
GRADED A+ WITH RATIONALES
1. A runner has depleted all the oxygen available for muscle energy. Which of the following will
facilitate his continued muscle performance?
a) Aerobic respiration
b) Anaerobic glycolysis
c) Oxidative phosphorylation
d) Krebs cycle
Answer: b) Anaerobic glycolysis
Rationale: When oxygen is depleted, muscles rely on anaerobic glycolysis to produce ATP
quickly, though less efficiently.
2. What causes the rapid change in the resting membrane potential that initiates an action
potential?
a) Potassium gates open, and potassium rushes out of the cell
b) Sodium gates open, and sodium rushes into the cell, changing the membrane potential
from negative to positive
c) Calcium gates open, and calcium enters the cell
d) Chloride gates open, and chloride enters the cell
Answer: b) Sodium gates open, and sodium rushes into the cell, changing the membrane
potential from negative to positive
Rationale: The influx of sodium ions depolarizes the cell membrane, initiating an action
potential.
Genetic Disorders
3. A 12-year-old male is diagnosed with Klinefelter syndrome. His karyotype would reveal which
of the following?
a) XO
b) XXY
c) XXX
d) XY
Answer: b) XXY
Rationale: Klinefelter syndrome is characterized by an extra X chromosome in males (47,XXY).
4. A nurse is reviewing a pedigree chart. When checking for a proband, what is the nurse looking
for?
a) The person who carries the gene but does not express the disease
,ESTUDYR
b) The person who is first diagnosed with a genetic disease
c) The person who has the most severe form of the disease
d) The person who is a carrier of the disease
Answer: b) The person who is first diagnosed with a genetic disease
Rationale: The proband is the individual in a family who first brings a genetic disorder to the
attention of medical professionals.
5. An aide asks the nurse why people with neurofibromatosis show varying degrees of the
disease. Which genetic principle should the nurse explain to the aide?
a) Penetrance
b) Expressivity
c) Dominance
d) Recessiveness
Answer: b) Expressivity
Rationale: Expressivity refers to the variation in the severity or manifestation of a genetic
disorder among individuals.
6. A 13-year-old female has a karyotype that reveals an absent homologous X chromosome with
only a single X chromosome present. Her features include short stature, widely spaced
nipples, and sparse body hair. What is her diagnosis?
a) Klinefelter syndrome
b) Turner syndrome
c) Down syndrome
d) Huntington disease
Answer: b) Turner syndrome
Rationale: Turner syndrome is characterized by a 45,X karyotype and features such as short
stature and sparse body hair.
7. A 50-year-old male was recently diagnosed with Huntington disease. Transmission of this
disease is associated with:
a) Autosomal recessive inheritance
b) Delayed age of onset
c) X-linked inheritance
d) Mitochondrial inheritance
Answer: b) Delayed age of onset
Rationale: Huntington disease is an autosomal dominant disorder with symptoms typically
appearing in adulthood.
8. A patient wants to know the risk factors for Down syndrome. What is the nurse's best
response?
a) Advanced paternal age
b) Pregnancy in women over age 35
c) Exposure to radiation during pregnancy
,ESTUDYR
d) Consanguinity
Answer: b) Pregnancy in women over age 35
Rationale: Advanced maternal age is the most significant risk factor for Down syndrome.
Cellular Transport and Metabolism
9. How are potassium and sodium transported across plasma membranes?
a) By simple diffusion
b) By adenosine triphosphate enzyme (ATPase)
c) By facilitated diffusion
d) By osmosis
Answer: b) By adenosine triphosphate enzyme (ATPase)
Rationale: The sodium-potassium pump (ATPase) actively transports sodium out of the cell and
potassium into the cell.
10. The nurse would be correct in identifying the predominant extracellular cation as:
a) Potassium
b) Sodium
c) Calcium
d) Magnesium
Answer: b) Sodium
Rationale: Sodium is the primary extracellular cation, while potassium is the primary
intracellular cation.
11. The early dilation (swelling) of the cell's endoplasmic reticulum results in:
a) Increased protein synthesis
b) Reduced protein synthesis
c) Enhanced DNA replication
d) Increased ATP production
Answer: b) Reduced protein synthesis
Rationale: Swelling of the endoplasmic reticulum disrupts its function, leading to reduced
protein synthesis.
12. Sodium and water accumulation in an injured cell are a direct result of:
a) Increased ATP production
b) Decreased ATP production
c) Enhanced ion transport
d) Increased protein synthesis
Answer: b) Decreased ATP production
Rationale: Reduced ATP impairs the sodium-potassium pump, leading to sodium and water
accumulation.
, ESTUDYR
13. The ion transporter that moves Na+ and Ca2+ simultaneously in the same direction is an
example of which of the following types of transport?
a) Antiport
b) Symport
c) Uniport
d) Passive transport
Answer: b) Symport
Rationale: Symport involves the simultaneous transport of two ions in the same direction.
Thyroid Disorders
14. Hypothyroidism is characterized by:
a) Increased metabolism and weight loss
b) Decreased metabolism and weight gain
c) Heat intolerance and diarrhea
d) Elevated T3 and T4 levels
Answer: b) Decreased metabolism and weight gain
Rationale: Hypothyroidism slows metabolic processes, leading to weight gain and fatigue.
15. Hyperthyroidism is characterized by:
a) Weight gain and constipation
b) Weight loss and diarrhea
c) Cold intolerance and lethargy
d) Decreased heart rate
Answer: b) Weight loss and diarrhea
Rationale: Hyperthyroidism increases metabolic rate, causing weight loss and gastrointestinal
hyperactivity.
16. The brain cannot produce T3 and T4 without:
a) Calcium
b) Iodine
c) Potassium
d) Sodium
Answer: b) Iodine
Rationale: Iodine is essential for the synthesis of thyroid hormones.
17. Which of the following is responsible for regulating calcium levels?
a) Thyroid gland
b) Parathyroid glands
c) Adrenal glands
d) Pituitary gland
