1
BIOS 255 - EXAM 4 LATEST 2026/2027 |
CARDIOVASCULAR, RESPIRATORY, DIGESTIVE, URINARY,
& ENDOCRINE SYSTEMS | 40 VERIFIED Q&A | DETAILED
RATIONALES | PASS GUARANTEED – A+ GRADED
SECTION 1: CARDIOVASCULAR SYSTEM - Questions 1-10
Q1: Cardiovascular System - Components
The nursing student is reviewing the cardiovascular system. Which of the following is a component
of the cardiovascular system?
A. Heart
B. Blood vessels
C. Blood
D. All of the above
Correct Answer: D
Rationale: The cardiovascular system consists of the heart, blood vessels, and blood. All options are
correct. [100% CORRECT]
Q2: Heart Chambers - Atria
The nursing student is reviewing heart anatomy. Which of the following are the upper chambers of
the heart?
A. Ventricles
B. Atria
C. Valves
D. Septum
Correct Answer: B
Rationale: The atria are the upper chambers of the heart. Option A are the lower chambers. Options
C and D are other structures. [100% CORRECT]
Q3: Heart Chambers - Ventricles
The nursing student is reviewing heart anatomy. Which of the following are the lower chambers of
the heart?
A. Ventricles
B. Atria
C. Valves
D. Septum
Correct Answer: A
Rationale: The ventricles are the lower chambers of the heart. Option B are the upper chambers.
Options C and D are other structures. [100% CORRECT]
, 2
Q4: Heart Valves - Function
The nursing student is reviewing heart valves. Which of the following is the function of heart valves?
A. To pump blood
B. To prevent backflow of blood
C. To regulate heart rate
D. To produce blood cells
Correct Answer: B
Rationale: Heart valves prevent backflow of blood. Option A is the function of the heart muscle.
Option C is the function of the SA node. Option D is bone marrow. [100% CORRECT]
Q5: Cardiac Cycle - Systole
The nursing student is reviewing the cardiac cycle. Which of the following describes systole?
A. Contraction of the heart
B. Relaxation of the heart
C. Filling of the heart
D. Emptying of the heart
Correct Answer: A
Rationale: Systole is the contraction of the heart. Option B is diastole. Options C and D are phases of
the cardiac cycle. [100% CORRECT]
Q6: Cardiac Cycle - Diastole
The nursing student is reviewing the cardiac cycle. Which of the following describes diastole?
A. Contraction of the heart
B. Relaxation of the heart
C. Emptying of the heart
D. Pumping of blood
Correct Answer: B
Rationale: Diastole is the relaxation of the heart. Option A is systole. Options C and D are phases of
systole. [100% CORRECT]
Q7: Blood Vessels - Arteries
The nursing student is reviewing blood vessels. Which of the following describes arteries?
A. Carry blood away from the heart
B. Carry blood to the heart
C. Exchange gases and nutrients
D. Store blood
Correct Answer: A
Rationale: Arteries carry blood away from the heart. Option B describes veins. Option C describes
capillaries. Option D describes veins. [100% CORRECT]
BIOS 255 - EXAM 4 LATEST 2026/2027 |
CARDIOVASCULAR, RESPIRATORY, DIGESTIVE, URINARY,
& ENDOCRINE SYSTEMS | 40 VERIFIED Q&A | DETAILED
RATIONALES | PASS GUARANTEED – A+ GRADED
SECTION 1: CARDIOVASCULAR SYSTEM - Questions 1-10
Q1: Cardiovascular System - Components
The nursing student is reviewing the cardiovascular system. Which of the following is a component
of the cardiovascular system?
A. Heart
B. Blood vessels
C. Blood
D. All of the above
Correct Answer: D
Rationale: The cardiovascular system consists of the heart, blood vessels, and blood. All options are
correct. [100% CORRECT]
Q2: Heart Chambers - Atria
The nursing student is reviewing heart anatomy. Which of the following are the upper chambers of
the heart?
A. Ventricles
B. Atria
C. Valves
D. Septum
Correct Answer: B
Rationale: The atria are the upper chambers of the heart. Option A are the lower chambers. Options
C and D are other structures. [100% CORRECT]
Q3: Heart Chambers - Ventricles
The nursing student is reviewing heart anatomy. Which of the following are the lower chambers of
the heart?
A. Ventricles
B. Atria
C. Valves
D. Septum
Correct Answer: A
Rationale: The ventricles are the lower chambers of the heart. Option B are the upper chambers.
Options C and D are other structures. [100% CORRECT]
, 2
Q4: Heart Valves - Function
The nursing student is reviewing heart valves. Which of the following is the function of heart valves?
A. To pump blood
B. To prevent backflow of blood
C. To regulate heart rate
D. To produce blood cells
Correct Answer: B
Rationale: Heart valves prevent backflow of blood. Option A is the function of the heart muscle.
Option C is the function of the SA node. Option D is bone marrow. [100% CORRECT]
Q5: Cardiac Cycle - Systole
The nursing student is reviewing the cardiac cycle. Which of the following describes systole?
A. Contraction of the heart
B. Relaxation of the heart
C. Filling of the heart
D. Emptying of the heart
Correct Answer: A
Rationale: Systole is the contraction of the heart. Option B is diastole. Options C and D are phases of
the cardiac cycle. [100% CORRECT]
Q6: Cardiac Cycle - Diastole
The nursing student is reviewing the cardiac cycle. Which of the following describes diastole?
A. Contraction of the heart
B. Relaxation of the heart
C. Emptying of the heart
D. Pumping of blood
Correct Answer: B
Rationale: Diastole is the relaxation of the heart. Option A is systole. Options C and D are phases of
systole. [100% CORRECT]
Q7: Blood Vessels - Arteries
The nursing student is reviewing blood vessels. Which of the following describes arteries?
A. Carry blood away from the heart
B. Carry blood to the heart
C. Exchange gases and nutrients
D. Store blood
Correct Answer: A
Rationale: Arteries carry blood away from the heart. Option B describes veins. Option C describes
capillaries. Option D describes veins. [100% CORRECT]
