,Chapter 1: An Introduction to Physiology
1. A patient presents with dehydration. Which body system plays a key role in regulating water
balance in the body?
a) Nervous system
b) Endocrine system
c) Urinary system
d) Cardiovascular system
Answer:
c) Urinary system Rationale:
The urinary system, particularly the kidneys, plays a vital role in regulating water balance by filtering
blood and eliminating excess fluids and waste. The kidneys respond to hormones that help maintain
fluid balance.
NCLEX Focus: Physiological Adaptation - Fluid and Electrolyte Imbalance
2. During a physical examination, the nurse checks the patient’s reflexes. This assessment
primarily involves which body system?
a) Respiratory system
b) Muscular system
c) Nervous system
d) Endocrine system
Answer:
c) Nervous system Rationale:
The nervous system is responsible for controlling reflex actions through the interaction between sensory
and motor neurons. Reflex testing helps evaluate the function of the nervous system.
NCLEX Focus: Physiological Integrity - Neurosensory System
3. A patient with high blood pressure is being treated with medications that affect heart rate and blood
vessel dilation. These medications are primarily targeting which system?
a) Digestive system
b) Cardiovascular system
c) Endocrine system
d) Respiratory system
Answer:
b) Cardiovascular system
Rationale:
The cardiovascular system controls blood pressure through heart rate and blood vessel resistance.
Medications for hypertension target the heart and blood vessels to reduce pressure.
NCLEX Focus: Pharmacological Therapies - Cardiovascular System
4. Which process is an example of positive feedback that a nurse may observe during labor and delivery?
a) Blood clotting
b) Uterine contractions
, c) Thermoregulation
d) Regulation of blood glucose
Answer:
b) Uterine contractions Rationale:
Positive feedback amplifies a response to achieve a specific outcome. During labor, uterine
contractions increase in intensity and frequency until childbirth occurs, a classic example of positive
feedback.
NCLEX Focus: Health Promotion and Maintenance - Reproductive System
5. A nurse explains to a patient that normal body temperature is maintained through which feedback
mechanism?
a) Positive feedback
b) Negative feedback
c) Hormonal regulation
d) Immune response
Answer:
b) Negative feedback Rationale:
Negative feedback mechanisms regulate body temperature by initiating responses to cool down or heat
up the body when deviations from normal temperature occur.
NCLEX Focus: Physiological Adaptation - Thermoregulation
6. A patient undergoing surgery is at risk for impaired oxygen delivery to tissues. Which organ
system is primarily responsible for transporting oxygen in the body?
a) Respiratory system
b) Cardiovascular system
c) Endocrine system
d) Digestive system
Answer:
b) Cardiovascular system
Rationale:
The cardiovascular system, through blood circulation, transports oxygen from the lungs to tissues. Red
blood cells carry oxygen, which is essential for cellular function.
NCLEX Focus: Physiological Integrity - Oxygenation
7. During an infection, which system is most responsible for defending the body against pathogens?
a) Cardiovascular system
b) Integumentary system
c) Lymphatic system
d) Nervous system
Answer:
c) Lymphatic system Rationale:
The lymphatic system plays a central role in immune defense, filtering pathogens and producing
immune cells like lymphocytes that help fight infections.
NCLEX Focus: Physiological Integrity - Immune System
, 8. A nurse is caring for a patient who is losing heat rapidly due to hypothermia. Which process will
the body most likely use to attempt to restore normal temperature?
a) Positive feedback
b) Negative feedback
c) Immune response
d) Hormonal secretion
Answer:
b) Negative feedback Rationale:
Negative feedback mechanisms will work to increase body temperature through shivering and
constricting blood vessels to conserve heat.
NCLEX Focus: Physiological Adaptation - Thermoregulation
9. After a meal, the body begins the process of breaking down carbohydrates for energy. Which life
process is this?
a) Metabolism
b) Growth
c) Differentiation
d) Reproduction
Answer:
a) Metabolism
Rationale:
Metabolism includes the chemical processes involved in breaking down food molecules to produce
energy. This is crucial for all body activities.
NCLEX Focus: Physiological Integrity - Metabolism
10. A patient with diabetes is unable to regulate blood glucose levels effectively. This patient has an
impairment in which process?
a) Growth
b) Homeostasis
c) Reproduction
d) Movement
Answer:
b) Homeostasis
Rationale:
Homeostasis refers to the body's ability to maintain stable internal conditions, such as blood glucose
levels, through feedback mechanisms. In diabetes, this regulation is impaired.
NCLEX Focus: Physiological Adaptation - Endocrine System
11. A patient experiences a sudden drop in blood pressure. What immediate feedback mechanism
does the body use to stabilize blood pressure?
a) Positive feedback
b) Negative feedback
c) Neutral feedback
d) Metabolic feedback
Answer:
b) Negative feedback Rationale:
1. A patient presents with dehydration. Which body system plays a key role in regulating water
balance in the body?
a) Nervous system
b) Endocrine system
c) Urinary system
d) Cardiovascular system
Answer:
c) Urinary system Rationale:
The urinary system, particularly the kidneys, plays a vital role in regulating water balance by filtering
blood and eliminating excess fluids and waste. The kidneys respond to hormones that help maintain
fluid balance.
NCLEX Focus: Physiological Adaptation - Fluid and Electrolyte Imbalance
2. During a physical examination, the nurse checks the patient’s reflexes. This assessment
primarily involves which body system?
a) Respiratory system
b) Muscular system
c) Nervous system
d) Endocrine system
Answer:
c) Nervous system Rationale:
The nervous system is responsible for controlling reflex actions through the interaction between sensory
and motor neurons. Reflex testing helps evaluate the function of the nervous system.
NCLEX Focus: Physiological Integrity - Neurosensory System
3. A patient with high blood pressure is being treated with medications that affect heart rate and blood
vessel dilation. These medications are primarily targeting which system?
a) Digestive system
b) Cardiovascular system
c) Endocrine system
d) Respiratory system
Answer:
b) Cardiovascular system
Rationale:
The cardiovascular system controls blood pressure through heart rate and blood vessel resistance.
Medications for hypertension target the heart and blood vessels to reduce pressure.
NCLEX Focus: Pharmacological Therapies - Cardiovascular System
4. Which process is an example of positive feedback that a nurse may observe during labor and delivery?
a) Blood clotting
b) Uterine contractions
, c) Thermoregulation
d) Regulation of blood glucose
Answer:
b) Uterine contractions Rationale:
Positive feedback amplifies a response to achieve a specific outcome. During labor, uterine
contractions increase in intensity and frequency until childbirth occurs, a classic example of positive
feedback.
NCLEX Focus: Health Promotion and Maintenance - Reproductive System
5. A nurse explains to a patient that normal body temperature is maintained through which feedback
mechanism?
a) Positive feedback
b) Negative feedback
c) Hormonal regulation
d) Immune response
Answer:
b) Negative feedback Rationale:
Negative feedback mechanisms regulate body temperature by initiating responses to cool down or heat
up the body when deviations from normal temperature occur.
NCLEX Focus: Physiological Adaptation - Thermoregulation
6. A patient undergoing surgery is at risk for impaired oxygen delivery to tissues. Which organ
system is primarily responsible for transporting oxygen in the body?
a) Respiratory system
b) Cardiovascular system
c) Endocrine system
d) Digestive system
Answer:
b) Cardiovascular system
Rationale:
The cardiovascular system, through blood circulation, transports oxygen from the lungs to tissues. Red
blood cells carry oxygen, which is essential for cellular function.
NCLEX Focus: Physiological Integrity - Oxygenation
7. During an infection, which system is most responsible for defending the body against pathogens?
a) Cardiovascular system
b) Integumentary system
c) Lymphatic system
d) Nervous system
Answer:
c) Lymphatic system Rationale:
The lymphatic system plays a central role in immune defense, filtering pathogens and producing
immune cells like lymphocytes that help fight infections.
NCLEX Focus: Physiological Integrity - Immune System
, 8. A nurse is caring for a patient who is losing heat rapidly due to hypothermia. Which process will
the body most likely use to attempt to restore normal temperature?
a) Positive feedback
b) Negative feedback
c) Immune response
d) Hormonal secretion
Answer:
b) Negative feedback Rationale:
Negative feedback mechanisms will work to increase body temperature through shivering and
constricting blood vessels to conserve heat.
NCLEX Focus: Physiological Adaptation - Thermoregulation
9. After a meal, the body begins the process of breaking down carbohydrates for energy. Which life
process is this?
a) Metabolism
b) Growth
c) Differentiation
d) Reproduction
Answer:
a) Metabolism
Rationale:
Metabolism includes the chemical processes involved in breaking down food molecules to produce
energy. This is crucial for all body activities.
NCLEX Focus: Physiological Integrity - Metabolism
10. A patient with diabetes is unable to regulate blood glucose levels effectively. This patient has an
impairment in which process?
a) Growth
b) Homeostasis
c) Reproduction
d) Movement
Answer:
b) Homeostasis
Rationale:
Homeostasis refers to the body's ability to maintain stable internal conditions, such as blood glucose
levels, through feedback mechanisms. In diabetes, this regulation is impaired.
NCLEX Focus: Physiological Adaptation - Endocrine System
11. A patient experiences a sudden drop in blood pressure. What immediate feedback mechanism
does the body use to stabilize blood pressure?
a) Positive feedback
b) Negative feedback
c) Neutral feedback
d) Metabolic feedback
Answer:
b) Negative feedback Rationale:
