BIOL251 Human Anatomy & Physiology I w/Lab 2026 |
Module 3 : Cardiovascular System – The Heart Exam
Review |70+ Questions and Answers Summary
|LockDown Browser |Portage Learning
Module 2: Cardiovascular System – The Heart
This module focuses on the anatomy and physiology of the heart, including its structure, function, and
role in circulation.
Heart Anatomy: Chambers (atria and ventricles), valves, and major blood vessels.
Cardiac Cycle: The sequence of events in one heartbeat, including systole (contraction) and
diastole (relaxation).
Heart Conduction System: Includes the sinoatrial (SA) node, atrioventricular (AV) node, bundle
of His, and Purkinje fibers.
Electrocardiogram (ECG): A recording of the electrical activity of the heart, used to diagnose
arrhythmias and other cardiac conditions.
Factors Affecting Heart Function: Physical activity, autonomic nervous system influences, and
metabolic demands.
Example: The ECG trace can reveal abnormalities in heart rhythm, such as atrial fibrillation.
Bonus 6 pages
,Section 1: Heart Anatomy, Layers & Membranes (Questions 1–15)
1. Where is the heart located within the thoracic cavity?
A) Inside the pleural cavity, posterior to the spine
B) Within the mediastinum, resting superiorly on the clavicle
C) Within the mediastinum, situated obliquely with the apex pointing toward the left hip
,D) Deep to the lungs, with the base pointing toward the left hip
Answer: C) Within the mediastinum, situated obliquely with the apex pointing toward the left
hip Explanation: The heart resides in the mediastinum (the central compartment of the
thoracic cavity) between the lungs. Its apex points inferiorly and laterally to the left, while its
base points superiorly toward the right shoulder.
2. What is the primary function of the fibrous pericardium?
A) To secrete slippery serous fluid to reduce friction
B) To protect, anchor the heart to surrounding structures, and prevent overfilling
C) To contract and pump blood out of the heart chambers
D) To serve as an electrical insulator between the atria and ventricles
Answer: B) To protect, anchor the heart to surrounding structures, and prevent overfilling
Explanation: The outer fibrous pericardium is a tough, dense connective tissue layer that
prevents the heart from overstretching, physically protects it, and secures it within the
mediastinum.
3. Which layer of the serous pericardium is also referred to as the epicardium?
A) Parietal layer
B) Visceral layer
C) Fibrous layer
D) Endocardium
Answer: B) Visceral layer Explanation: The serous pericardium is double-layered. The
parietal layer lines the inside of the fibrous pericardium, while the visceral layer (epicardium)
is in direct contact with and covers the outer surface of the heart wall.
, 4. Where is the pericardial cavity located, and what does it contain?
A) Between the fibrous pericardium and the parietal layer; contains blood
B) Between the parietal and visceral layers of the serous pericardium; contains serous fluid
C) Within the myocardium; contains air
D) Between the endocardium and the myocardium; contains cerebrospinal fluid
Answer: B) Between the parietal and visceral layers of the serous pericardium; contains
serous fluid Explanation: The pericardial cavity is a microscopic space containing a thin film
of lubricating serous fluid, which reduces friction as the heart beats.
5. What clinical condition results when excess fluid accumulates in the pericardial
cavity, compressing the heart and limiting its ability to pump?
A) Angina pectoris
B) Myocardial infarction
C) Cardiac tamponade
D) Heart block
Answer: C) Cardiac tamponade Explanation: "Heart drop" or cardiac tamponade occurs
when inflammatory fluid, pus, or blood fills the pericardial space, exerting external pressure
that prevents the heart chambers from filling properly during diastole.
6. Which of the following correctly sequences the layers of the heart wall from
superficial to deep?
A) Endocardium $\rightarrow$ Myocardium $\rightarrow$ Epicardium
B) Epicardium $\rightarrow$ Myocardium $\rightarrow$ Endocardium
C) Myocardium $\rightarrow$ Endocardium $\rightarrow$ Epicardium
Module 3 : Cardiovascular System – The Heart Exam
Review |70+ Questions and Answers Summary
|LockDown Browser |Portage Learning
Module 2: Cardiovascular System – The Heart
This module focuses on the anatomy and physiology of the heart, including its structure, function, and
role in circulation.
Heart Anatomy: Chambers (atria and ventricles), valves, and major blood vessels.
Cardiac Cycle: The sequence of events in one heartbeat, including systole (contraction) and
diastole (relaxation).
Heart Conduction System: Includes the sinoatrial (SA) node, atrioventricular (AV) node, bundle
of His, and Purkinje fibers.
Electrocardiogram (ECG): A recording of the electrical activity of the heart, used to diagnose
arrhythmias and other cardiac conditions.
Factors Affecting Heart Function: Physical activity, autonomic nervous system influences, and
metabolic demands.
Example: The ECG trace can reveal abnormalities in heart rhythm, such as atrial fibrillation.
Bonus 6 pages
,Section 1: Heart Anatomy, Layers & Membranes (Questions 1–15)
1. Where is the heart located within the thoracic cavity?
A) Inside the pleural cavity, posterior to the spine
B) Within the mediastinum, resting superiorly on the clavicle
C) Within the mediastinum, situated obliquely with the apex pointing toward the left hip
,D) Deep to the lungs, with the base pointing toward the left hip
Answer: C) Within the mediastinum, situated obliquely with the apex pointing toward the left
hip Explanation: The heart resides in the mediastinum (the central compartment of the
thoracic cavity) between the lungs. Its apex points inferiorly and laterally to the left, while its
base points superiorly toward the right shoulder.
2. What is the primary function of the fibrous pericardium?
A) To secrete slippery serous fluid to reduce friction
B) To protect, anchor the heart to surrounding structures, and prevent overfilling
C) To contract and pump blood out of the heart chambers
D) To serve as an electrical insulator between the atria and ventricles
Answer: B) To protect, anchor the heart to surrounding structures, and prevent overfilling
Explanation: The outer fibrous pericardium is a tough, dense connective tissue layer that
prevents the heart from overstretching, physically protects it, and secures it within the
mediastinum.
3. Which layer of the serous pericardium is also referred to as the epicardium?
A) Parietal layer
B) Visceral layer
C) Fibrous layer
D) Endocardium
Answer: B) Visceral layer Explanation: The serous pericardium is double-layered. The
parietal layer lines the inside of the fibrous pericardium, while the visceral layer (epicardium)
is in direct contact with and covers the outer surface of the heart wall.
, 4. Where is the pericardial cavity located, and what does it contain?
A) Between the fibrous pericardium and the parietal layer; contains blood
B) Between the parietal and visceral layers of the serous pericardium; contains serous fluid
C) Within the myocardium; contains air
D) Between the endocardium and the myocardium; contains cerebrospinal fluid
Answer: B) Between the parietal and visceral layers of the serous pericardium; contains
serous fluid Explanation: The pericardial cavity is a microscopic space containing a thin film
of lubricating serous fluid, which reduces friction as the heart beats.
5. What clinical condition results when excess fluid accumulates in the pericardial
cavity, compressing the heart and limiting its ability to pump?
A) Angina pectoris
B) Myocardial infarction
C) Cardiac tamponade
D) Heart block
Answer: C) Cardiac tamponade Explanation: "Heart drop" or cardiac tamponade occurs
when inflammatory fluid, pus, or blood fills the pericardial space, exerting external pressure
that prevents the heart chambers from filling properly during diastole.
6. Which of the following correctly sequences the layers of the heart wall from
superficial to deep?
A) Endocardium $\rightarrow$ Myocardium $\rightarrow$ Epicardium
B) Epicardium $\rightarrow$ Myocardium $\rightarrow$ Endocardium
C) Myocardium $\rightarrow$ Endocardium $\rightarrow$ Epicardium
