Below are some sample revision test questions—with answer choices and detailed
rationales—that cover key concepts often highlighted in Bryan Bledsoe’s Anatomy &
Physiology for Emergency Care (3rd Edition). These questions are designed to help reinforce
your understanding of foundational topics in anatomy and physiology as they apply to
emergency care.
Question 1: Cell Structure and Function
Which of the following best describes the role of the plasma membrane in a cell?
A. It contains the genetic material and directs protein synthesis.
B. It acts as a barrier, controlling what enters and exits the cell.
C. It generates energy through oxidative phosphorylation.
D. It stores calcium for muscle contractions.
Correct Answer: B
Rationale:
The plasma membrane is a selectively permeable barrier that regulates the passage of ions, nutrients,
and waste products. Option A refers to the nucleus, option C to the mitochondria, and option D to the
sarcoplasmic reticulum in muscle cells.
Question 2: Cardiovascular System
During a state of shock, which of the following compensatory mechanisms is most likely to occur?
A. Increased heart rate and vasoconstriction
B. Decreased heart rate and vasodilation
C. Increased stroke volume with a decreased heart rate
D. Increased blood volume through rapid fluid retention
Correct Answer: A
Rationale:
In shock, the body activates the sympathetic nervous system to increase heart rate and induce
vasoconstriction, which helps maintain blood pressure and perfusion to vital organs. This is a key
concept in emergency care physiology.
Question 3: Respiratory System
In a patient experiencing respiratory distress, which muscle is most important for increasing thoracic
volume during deep inspiration?
A. Diaphragm
B. Trapezius
C. Pectoralis major
D. Latissimus dorsi
, Correct Answer: A
Rationale:
The diaphragm is the primary muscle responsible for inspiration. During deep breathing, it contracts and
flattens, increasing the volume of the thoracic cavity and allowing air to flow into the lungs.
Question 4: Nervous System
Which part of the nervous system is responsible for the “fight or flight” response?
A. Parasympathetic nervous system
B. Somatic nervous system
C. Sympathetic nervous system
D. Central nervous system
Correct Answer: C
Rationale:
The sympathetic nervous system mediates the “fight or flight” response by increasing heart rate, dilating
bronchial passages, and redistributing blood flow to muscles, preparing the body for rapid action.
Question 5: Musculoskeletal System
What is the primary function of osteoclasts?
A. Bone formation
B. Bone resorption
C. Collagen synthesis
D. Calcium absorption in the intestine
Correct Answer: B
Rationale:
Osteoclasts are cells that break down bone tissue, a process known as bone resorption. This is critical for
bone remodeling and calcium homeostasis. In contrast, osteoblasts are responsible for bone formation.
Question 6: Blood and Hemostasis
Which component of blood is most directly involved in the clotting process?
A. Erythrocytes
B. Leukocytes
C. Platelets
D. Plasma proteins
Correct Answer: C
rationales—that cover key concepts often highlighted in Bryan Bledsoe’s Anatomy &
Physiology for Emergency Care (3rd Edition). These questions are designed to help reinforce
your understanding of foundational topics in anatomy and physiology as they apply to
emergency care.
Question 1: Cell Structure and Function
Which of the following best describes the role of the plasma membrane in a cell?
A. It contains the genetic material and directs protein synthesis.
B. It acts as a barrier, controlling what enters and exits the cell.
C. It generates energy through oxidative phosphorylation.
D. It stores calcium for muscle contractions.
Correct Answer: B
Rationale:
The plasma membrane is a selectively permeable barrier that regulates the passage of ions, nutrients,
and waste products. Option A refers to the nucleus, option C to the mitochondria, and option D to the
sarcoplasmic reticulum in muscle cells.
Question 2: Cardiovascular System
During a state of shock, which of the following compensatory mechanisms is most likely to occur?
A. Increased heart rate and vasoconstriction
B. Decreased heart rate and vasodilation
C. Increased stroke volume with a decreased heart rate
D. Increased blood volume through rapid fluid retention
Correct Answer: A
Rationale:
In shock, the body activates the sympathetic nervous system to increase heart rate and induce
vasoconstriction, which helps maintain blood pressure and perfusion to vital organs. This is a key
concept in emergency care physiology.
Question 3: Respiratory System
In a patient experiencing respiratory distress, which muscle is most important for increasing thoracic
volume during deep inspiration?
A. Diaphragm
B. Trapezius
C. Pectoralis major
D. Latissimus dorsi
, Correct Answer: A
Rationale:
The diaphragm is the primary muscle responsible for inspiration. During deep breathing, it contracts and
flattens, increasing the volume of the thoracic cavity and allowing air to flow into the lungs.
Question 4: Nervous System
Which part of the nervous system is responsible for the “fight or flight” response?
A. Parasympathetic nervous system
B. Somatic nervous system
C. Sympathetic nervous system
D. Central nervous system
Correct Answer: C
Rationale:
The sympathetic nervous system mediates the “fight or flight” response by increasing heart rate, dilating
bronchial passages, and redistributing blood flow to muscles, preparing the body for rapid action.
Question 5: Musculoskeletal System
What is the primary function of osteoclasts?
A. Bone formation
B. Bone resorption
C. Collagen synthesis
D. Calcium absorption in the intestine
Correct Answer: B
Rationale:
Osteoclasts are cells that break down bone tissue, a process known as bone resorption. This is critical for
bone remodeling and calcium homeostasis. In contrast, osteoblasts are responsible for bone formation.
Question 6: Blood and Hemostasis
Which component of blood is most directly involved in the clotting process?
A. Erythrocytes
B. Leukocytes
C. Platelets
D. Plasma proteins
Correct Answer: C
