NUR611/NUR 611 Exam 1 V1 | Adv
Practice Nursing I Q&A with Rationale |
William Paterson University
1. A patient experiences a decrease in muscle mass due to prolonged bed rest. Which term
describes this cellular adaptation?
A. Hyperplasia is defined as an increase in the number of cells in an organ or tissue.
B. Hypertrophy represents an increase in the size of cells rather than the number.
C. Metaplasia describes the replacement of one mature cell type by another cell type.
D. Atrophy refers to a decrease or shrinkage in cellular size within a tissue.
Correct Answer: D
Expert Explanation: Atrophy occurs when there is a reduction in the functional demand
or nerve stimulation to a tissue. This process involves the loss of structural proteins and
organelles to conserve energy. It is a common physiological response to immobilization or
chronic malnutrition.
2. Which type of cellular adaptation is most likely to be seen in the uterine lining during a
normal menstrual cycle?
A. Pathologic dysplasia involves abnormal changes in cell size and shape.
B. Physiologic hyperplasia involves the increase in cell numbers due to hormonal
stimulation.
,C. Ischemic necrosis is the death of cells due to lack of blood supply.
D. Metaplasia is the conversion of columnar epithelium into squamous epithelium.
Correct Answer: B
Expert Explanation: Physiologic hyperplasia is a normal response to hormonal changes
such as the estrogen-induced growth of the endometrium. This process allows the tissue to
prepare for potential pregnancy by increasing the total cell count. Once the stimulus is
removed, the tissue typically returns to its normal state.
3. A patient presents with a chronic cough and a history of smoking; biopsy shows squamous
cells instead of ciliated columnar cells in the bronchi. What is this called?
A. Metaplasia is the reversible replacement of one mature cell type with another.
B. Anaplasia is a lack of cellular differentiation often seen in cancer.
C. Dysplasia is a disorganized growth pattern of cells.
D. Hypertrophy is the enlargement of existing cells in the airway.
Correct Answer: A
Expert Explanation: Metaplasia is a protective mechanism where the body replaces fragile
cells with more durable ones in response to chronic irritation. In smokers, the ciliated
columnar epithelium is replaced by stratified squamous epithelium to better withstand
smoke. While this provides protection, the loss of cilia impairs the clearance of mucus and
debris.
, 4. Which cellular injury mechanism is primarily associated with the production of reactive
oxygen species (ROS)?
A. Chemical injury involves the direct toxicity of a substance to the cell membrane.
B. Free radical injury occurs when unstable molecules cause oxidative stress.
C. Hypoxic injury is the deprivation of oxygen to the tissues.
D. Mechanical injury is the physical trauma to the cell structure.
Correct Answer: B
Expert Explanation: Free radicals are highly reactive chemical species that possess an
unpaired electron. These molecules can damage lipids, proteins, and DNA through a
process known as oxidative stress. Antioxidants are typically responsible for neutralizing
these species to prevent cellular damage.
5. What is the hallmark characteristic of irreversible cellular injury?
A. Mitochondrial membrane damage and calcium influx signify the point of no return.
B. Ribosome detachment occurs during the early stages of stress.
C. Cellular swelling is the most common sign of reversible injury.
D. Fatty change is the accumulation of lipids within the cytoplasm.
Correct Answer: A
Expert Explanation: When the mitochondrial membrane is severely damaged, the cell
loses its ability to produce ATP. A significant influx of calcium into the cytosol activates
Practice Nursing I Q&A with Rationale |
William Paterson University
1. A patient experiences a decrease in muscle mass due to prolonged bed rest. Which term
describes this cellular adaptation?
A. Hyperplasia is defined as an increase in the number of cells in an organ or tissue.
B. Hypertrophy represents an increase in the size of cells rather than the number.
C. Metaplasia describes the replacement of one mature cell type by another cell type.
D. Atrophy refers to a decrease or shrinkage in cellular size within a tissue.
Correct Answer: D
Expert Explanation: Atrophy occurs when there is a reduction in the functional demand
or nerve stimulation to a tissue. This process involves the loss of structural proteins and
organelles to conserve energy. It is a common physiological response to immobilization or
chronic malnutrition.
2. Which type of cellular adaptation is most likely to be seen in the uterine lining during a
normal menstrual cycle?
A. Pathologic dysplasia involves abnormal changes in cell size and shape.
B. Physiologic hyperplasia involves the increase in cell numbers due to hormonal
stimulation.
,C. Ischemic necrosis is the death of cells due to lack of blood supply.
D. Metaplasia is the conversion of columnar epithelium into squamous epithelium.
Correct Answer: B
Expert Explanation: Physiologic hyperplasia is a normal response to hormonal changes
such as the estrogen-induced growth of the endometrium. This process allows the tissue to
prepare for potential pregnancy by increasing the total cell count. Once the stimulus is
removed, the tissue typically returns to its normal state.
3. A patient presents with a chronic cough and a history of smoking; biopsy shows squamous
cells instead of ciliated columnar cells in the bronchi. What is this called?
A. Metaplasia is the reversible replacement of one mature cell type with another.
B. Anaplasia is a lack of cellular differentiation often seen in cancer.
C. Dysplasia is a disorganized growth pattern of cells.
D. Hypertrophy is the enlargement of existing cells in the airway.
Correct Answer: A
Expert Explanation: Metaplasia is a protective mechanism where the body replaces fragile
cells with more durable ones in response to chronic irritation. In smokers, the ciliated
columnar epithelium is replaced by stratified squamous epithelium to better withstand
smoke. While this provides protection, the loss of cilia impairs the clearance of mucus and
debris.
, 4. Which cellular injury mechanism is primarily associated with the production of reactive
oxygen species (ROS)?
A. Chemical injury involves the direct toxicity of a substance to the cell membrane.
B. Free radical injury occurs when unstable molecules cause oxidative stress.
C. Hypoxic injury is the deprivation of oxygen to the tissues.
D. Mechanical injury is the physical trauma to the cell structure.
Correct Answer: B
Expert Explanation: Free radicals are highly reactive chemical species that possess an
unpaired electron. These molecules can damage lipids, proteins, and DNA through a
process known as oxidative stress. Antioxidants are typically responsible for neutralizing
these species to prevent cellular damage.
5. What is the hallmark characteristic of irreversible cellular injury?
A. Mitochondrial membrane damage and calcium influx signify the point of no return.
B. Ribosome detachment occurs during the early stages of stress.
C. Cellular swelling is the most common sign of reversible injury.
D. Fatty change is the accumulation of lipids within the cytoplasm.
Correct Answer: A
Expert Explanation: When the mitochondrial membrane is severely damaged, the cell
loses its ability to produce ATP. A significant influx of calcium into the cytosol activates
