BIOD 152 Lab 4 Exam Actual 2026/2027
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Pass Guaranteed – A+ Graded
Content Area Overview
This actual examination reflects the foundational anatomical and physiological knowledge required for
success on the BIOD 152 Lab 4 Exam. It is designed to evaluate the student's understanding of the
circulatory system, including the heart's location and structure, the classification and function of blood
vessels, and the pathways of blood flow through the pulmonary and systemic circuits. Questions are
structured to assess recall of key terms and structures, application of physiological principles to clinical
scenarios, and analysis of the system's role in homeostasis. This authentic question bank represents the
real exams used in the course and serves as a comprehensive resource for students demonstrating
mastery of circulatory system content.
Section I: Heart Anatomy and Circulatory Pathways (7 Questions)
Q1. The heart is located in the mediastinum, which is the central compartment of the thoracic cavity.
Which of the following best describes the orientation of the heart within the chest?
A. The apex of the heart points toward the right side of the body
B. The apex of the heart points toward the left hip, and the base is directed toward the right shoulder
C. The heart sits perfectly vertical with no tilt in either direction
D. The apex points toward the sternum, and the base faces the spine
B. The apex of the heart points toward the left hip, and the base is directed toward the right shoulder
[CORRECT]
The best answer is B. The heart is a cone-shaped organ that sits tilted within the mediastinum, with its
broad base anchored near the right second rib and its pointed apex directed downward, forward, and to
the left—roughly at the level of the fifth intercostal space. This leftward tilt is why the heartbeat is most
strongly felt on the left side of the chest. This aligns with the lab manual's description that the heart's
orientation places the right ventricle closest to the anterior chest wall.
, Correct Answer: B
Q2. A medical student is examining a heart model and points to the chamber that receives oxygenated
blood returning from the lungs. Which chamber is she identifying?
A. Right atrium
B. Right ventricle
C. Left atrium
D. Left ventricle
C. Left atrium [CORRECT]
The best answer is C. The left atrium receives oxygenated blood from the lungs via the four pulmonary
veins. From there, blood passes through the bicuspid (mitral) valve into the left ventricle, which then
pumps it out through the aortic valve into the aorta for distribution to the entire body. The right atrium
receives deoxygenated blood from the body, and the right ventricle pumps deoxygenated blood to the
lungs. This matches the principle that the left side of the heart handles oxygenated blood while the right
side handles deoxygenated blood.
Correct Answer: C
Q3. A red blood cell has just been oxygenated in the lungs and is returning to the heart. Trace its
complete pathway from the lungs back to the body.
A. Pulmonary veins → left atrium → bicuspid valve → left ventricle → aortic valve → aorta → systemic
arteries
B. Pulmonary arteries → left atrium → tricuspid valve → left ventricle → pulmonary valve → aorta
C. Pulmonary veins → right atrium → tricuspid valve → right ventricle → pulmonary valve → aorta
D. Pulmonary arteries → right atrium → bicuspid valve → right ventricle → aortic valve → systemic
arteries
A. Pulmonary veins → left atrium → bicuspid valve → left ventricle → aortic valve → aorta → systemic
arteries [CORRECT]
The best answer is A. Oxygenated blood leaves the lungs through the pulmonary veins (the only veins in
the body that carry oxygenated blood) and enters the left atrium. It then passes through the bicuspid
(mitral) valve into the left ventricle, is pumped through the aortic valve into the aorta, and is distributed
to the body through the systemic arterial network. This aligns with the lab manual's pathway tracing
that the pulmonary circuit ends and the systemic circuit begins at the left side of the heart.
Correct Answer: A
100% Verified | Detailed Rationales –
Pass Guaranteed – A+ Graded
Content Area Overview
This actual examination reflects the foundational anatomical and physiological knowledge required for
success on the BIOD 152 Lab 4 Exam. It is designed to evaluate the student's understanding of the
circulatory system, including the heart's location and structure, the classification and function of blood
vessels, and the pathways of blood flow through the pulmonary and systemic circuits. Questions are
structured to assess recall of key terms and structures, application of physiological principles to clinical
scenarios, and analysis of the system's role in homeostasis. This authentic question bank represents the
real exams used in the course and serves as a comprehensive resource for students demonstrating
mastery of circulatory system content.
Section I: Heart Anatomy and Circulatory Pathways (7 Questions)
Q1. The heart is located in the mediastinum, which is the central compartment of the thoracic cavity.
Which of the following best describes the orientation of the heart within the chest?
A. The apex of the heart points toward the right side of the body
B. The apex of the heart points toward the left hip, and the base is directed toward the right shoulder
C. The heart sits perfectly vertical with no tilt in either direction
D. The apex points toward the sternum, and the base faces the spine
B. The apex of the heart points toward the left hip, and the base is directed toward the right shoulder
[CORRECT]
The best answer is B. The heart is a cone-shaped organ that sits tilted within the mediastinum, with its
broad base anchored near the right second rib and its pointed apex directed downward, forward, and to
the left—roughly at the level of the fifth intercostal space. This leftward tilt is why the heartbeat is most
strongly felt on the left side of the chest. This aligns with the lab manual's description that the heart's
orientation places the right ventricle closest to the anterior chest wall.
, Correct Answer: B
Q2. A medical student is examining a heart model and points to the chamber that receives oxygenated
blood returning from the lungs. Which chamber is she identifying?
A. Right atrium
B. Right ventricle
C. Left atrium
D. Left ventricle
C. Left atrium [CORRECT]
The best answer is C. The left atrium receives oxygenated blood from the lungs via the four pulmonary
veins. From there, blood passes through the bicuspid (mitral) valve into the left ventricle, which then
pumps it out through the aortic valve into the aorta for distribution to the entire body. The right atrium
receives deoxygenated blood from the body, and the right ventricle pumps deoxygenated blood to the
lungs. This matches the principle that the left side of the heart handles oxygenated blood while the right
side handles deoxygenated blood.
Correct Answer: C
Q3. A red blood cell has just been oxygenated in the lungs and is returning to the heart. Trace its
complete pathway from the lungs back to the body.
A. Pulmonary veins → left atrium → bicuspid valve → left ventricle → aortic valve → aorta → systemic
arteries
B. Pulmonary arteries → left atrium → tricuspid valve → left ventricle → pulmonary valve → aorta
C. Pulmonary veins → right atrium → tricuspid valve → right ventricle → pulmonary valve → aorta
D. Pulmonary arteries → right atrium → bicuspid valve → right ventricle → aortic valve → systemic
arteries
A. Pulmonary veins → left atrium → bicuspid valve → left ventricle → aortic valve → aorta → systemic
arteries [CORRECT]
The best answer is A. Oxygenated blood leaves the lungs through the pulmonary veins (the only veins in
the body that carry oxygenated blood) and enters the left atrium. It then passes through the bicuspid
(mitral) valve into the left ventricle, is pumped through the aortic valve into the aorta, and is distributed
to the body through the systemic arterial network. This aligns with the lab manual's pathway tracing
that the pulmonary circuit ends and the systemic circuit begins at the left side of the heart.
Correct Answer: A
