WCU PHYS 261 MIDTERM EXAM 200 Practice Questions with
Answers & Rationales LATEST UPDATE THIS YEAR. JUST
RELEASED
Summary of Content Areas:
Section Topic Questions
1 Introduction to Physiology & Homeostasis 1–25
2 Cell Physiology & Membrane Transport 26–55
3 Neurophysiology 56–90
4 Muscle Physiology 91–120
5 Cardiovascular Physiology 121–150
6 Respiratory Physiology 151–175
7 Renal Physiology 176–190
8 Endocrine Physiology 191–200
This exam covers the core content areas of the WCU PHYS 261 Human Physiology midterm:
Homeostasis and feedback mechanisms
Cell structure, membrane transport, and cellular physiology
Neurophysiology, including action potentials, synaptic transmission, and the nervous system
Muscle physiology, including contraction mechanisms and fiber types
Cardiovascular physiology, including cardiac cycle, ECG, and blood pressure regulation
, Respiratory physiology, including ventilation, gas exchange, and lung volumes
Renal physiology, including nephron function, GFR, and urine formation
Endocrine physiology, including hormone function and major endocrine gland
SECTION 1: INTRODUCTION TO PHYSIOLOGY & HOMEOSTASIS (Questions 1–25)
1. What is the definition of physiology?
A) The study of the structure of the body
B) The study of the function of the body—how body parts work and carry out life-sustaining
activities
C) The study of tissues at the microscopic level
D) The study of growth and reproduction
Answer: B – The study of the function of the body—how body parts work and carry
out life-sustaining activities
Rationale: Physiology is the study of how the body functions, while anatomy is the study of
structure.
2. What is the correct order of structural organization from simplest to most
complex?
A) Cell → Tissue → Organ → Organ System → Organism
B) Tissue → Cell → Organ → Organ System → Organism
C) Organ → Tissue → Cell → Organ System → Organism
D) Cell → Organ → Tissue → Organ System → Organism
Answer: A – Cell → Tissue → Organ → Organ System → Organism
Rationale: The levels of organization are: chemical → cellular → tissue → organ → organ
system → organism.
,3. Homeostasis is best defined as:
A) A state of constant internal balance within the body
B) The study of how the body works
C) The process of growth and reproduction
D) The body's response to external stimuli
Answer: A – A state of constant internal balance within the body
Rationale: Homeostasis refers to maintaining stable internal conditions despite external
changes.
4. Which of the following is an example of a negative feedback mechanism?
A) Blood clotting
B) Regulation of body temperature
C) Uterine contractions during childbirth
D) Milk production during lactation
Answer: B – Regulation of body temperature
Rationale: Negative feedback reverses a change to restore the set point. Temperature
regulation is a classic example.
5. What is a "placebo effect"?
A) A positive result from a treatment that has no therapeutic value
B) A negative reaction to a medication
C) A side effect of a drug
D) A type of homeostatic imbalance
, Answer: A – A positive result from a treatment that has no therapeutic value
Rationale: The placebo effect describes improvement due to belief in treatment rather than
the treatment itself.
6. Which body system does NOT exchange material with the internal and external
environments?
A) Urinary system
B) Respiratory system
C) Circulatory system
D) Digestive system
Answer: C – Circulatory system
Rationale: The circulatory system transports materials internally; it does not directly
exchange with the external environment.
7. Which of the following is a function of the respiratory system?
A) Perfusion
B) Ventilation
C) Air filtration
D) All of the above
Answer: D – All of the above
Rationale: The respiratory system performs ventilation, air filtration, gas exchange, and pH
regulation.
Answers & Rationales LATEST UPDATE THIS YEAR. JUST
RELEASED
Summary of Content Areas:
Section Topic Questions
1 Introduction to Physiology & Homeostasis 1–25
2 Cell Physiology & Membrane Transport 26–55
3 Neurophysiology 56–90
4 Muscle Physiology 91–120
5 Cardiovascular Physiology 121–150
6 Respiratory Physiology 151–175
7 Renal Physiology 176–190
8 Endocrine Physiology 191–200
This exam covers the core content areas of the WCU PHYS 261 Human Physiology midterm:
Homeostasis and feedback mechanisms
Cell structure, membrane transport, and cellular physiology
Neurophysiology, including action potentials, synaptic transmission, and the nervous system
Muscle physiology, including contraction mechanisms and fiber types
Cardiovascular physiology, including cardiac cycle, ECG, and blood pressure regulation
, Respiratory physiology, including ventilation, gas exchange, and lung volumes
Renal physiology, including nephron function, GFR, and urine formation
Endocrine physiology, including hormone function and major endocrine gland
SECTION 1: INTRODUCTION TO PHYSIOLOGY & HOMEOSTASIS (Questions 1–25)
1. What is the definition of physiology?
A) The study of the structure of the body
B) The study of the function of the body—how body parts work and carry out life-sustaining
activities
C) The study of tissues at the microscopic level
D) The study of growth and reproduction
Answer: B – The study of the function of the body—how body parts work and carry
out life-sustaining activities
Rationale: Physiology is the study of how the body functions, while anatomy is the study of
structure.
2. What is the correct order of structural organization from simplest to most
complex?
A) Cell → Tissue → Organ → Organ System → Organism
B) Tissue → Cell → Organ → Organ System → Organism
C) Organ → Tissue → Cell → Organ System → Organism
D) Cell → Organ → Tissue → Organ System → Organism
Answer: A – Cell → Tissue → Organ → Organ System → Organism
Rationale: The levels of organization are: chemical → cellular → tissue → organ → organ
system → organism.
,3. Homeostasis is best defined as:
A) A state of constant internal balance within the body
B) The study of how the body works
C) The process of growth and reproduction
D) The body's response to external stimuli
Answer: A – A state of constant internal balance within the body
Rationale: Homeostasis refers to maintaining stable internal conditions despite external
changes.
4. Which of the following is an example of a negative feedback mechanism?
A) Blood clotting
B) Regulation of body temperature
C) Uterine contractions during childbirth
D) Milk production during lactation
Answer: B – Regulation of body temperature
Rationale: Negative feedback reverses a change to restore the set point. Temperature
regulation is a classic example.
5. What is a "placebo effect"?
A) A positive result from a treatment that has no therapeutic value
B) A negative reaction to a medication
C) A side effect of a drug
D) A type of homeostatic imbalance
, Answer: A – A positive result from a treatment that has no therapeutic value
Rationale: The placebo effect describes improvement due to belief in treatment rather than
the treatment itself.
6. Which body system does NOT exchange material with the internal and external
environments?
A) Urinary system
B) Respiratory system
C) Circulatory system
D) Digestive system
Answer: C – Circulatory system
Rationale: The circulatory system transports materials internally; it does not directly
exchange with the external environment.
7. Which of the following is a function of the respiratory system?
A) Perfusion
B) Ventilation
C) Air filtration
D) All of the above
Answer: D – All of the above
Rationale: The respiratory system performs ventilation, air filtration, gas exchange, and pH
regulation.
