BIOD 152 Module 4 Exam Questions
with Verified Solutions
T or F: The cardio vascular system is the study of the organs of the body - ANSWER-
false: It is the study of the heart, blood vessels.
T or F: The tough, thick sac that encloses the heart and anchors it to the diagram is the
pericardium - ANSWER-True
T or F: The abdominal cavity contains the heart - ANSWER-False- pericardial cavity
inside the thoracic cavity
Which layer of the heart is continuous with the blood vessels linings? - ANSWER-
Endocardium
T or F: The left ventricle faces anteriorly, towards the sternum - ANSWER-False- the
right ventricle faces anteriorly (closest to the sternum)
Describe the location of the heart to the diaphragm - ANSWER-The diaphragm is
located inferior to the heart. (The heart is located superior to the diaphragm)
The two upper chambers of the heart are called - ANSWER-Atria
The two lower chambers of the heart are called - ANSWER-Ventricles
How does the nervous system and endocrine system interact with the heart? -
ANSWER-The heart rate is regulated by the nervous system and endocrine system
which can increase or decrease the rate of the heartbeat and blood pressure
What is the purpose of the bulb? - ANSWER-The bulb portion is squeezed to inflate the
bladder with air
What is the purpose of valves inside the veins? - ANSWER-Prevents the backward flow
of blood
What portion is the pacemaker of the heart? - ANSWER-SA node
Following the bundle of HIS, where does the electrical impulse travel next? - ANSWER-
Purkinje fibers
The impulse of the SA node causes contraction of the ______ - ANSWER-Atria
, What is an EKG? - ANSWER-A device used to measure electrical impulses in the heart
What is the P-wave? - ANSWER-Atrial depolarization and atrial systole
What is edema? - ANSWER-Fluid accumulation
What is Pulmonary edema? - ANSWER-Fluid in the lungs
Hypertension is blood pressure significantly higher than: - ANSWER-120/80
What is the purpose of the fossa ovalis in the fetus - ANSWER-It allows fetal blood to
move directly from right to left atrium, bypassing the underdeveloped lungs can receive
oxygen once the baby is born
What is the purpose of the mitral valve? - ANSWER-The mitral valve (bicuspid) controls
the flow of blood from the left atrium into the left ventricle.
What is the purpose of veins? - ANSWER-Veins carry blood back to the heart
T or F: Veins are primarily responsible for the vessels ability to control peripheral -
ANSWER-False- The arterioles
How does the contraction and relaxation of the arterioles help to control blood
pressure? - ANSWER-Contracting the arterioles increases the blood pressure through
decreasing the available volume. Relaxation of the arterioles decreases blood pressure
as the volume increases.
What does compliance mean? - ANSWER-Stretch with little recoil.
What are the three layers of a vessel - ANSWER-Tunica externa (superficial), tunica
media, Tunica intima (closest to the lumen)
T or F: Only arteries contain tunica media. - ANSWER-False- all vessels contain three
layers but in differing proportions
Capillaries are interconnected to form - ANSWER-Capillary beds
The aortic arch becomes the _____ as it moves inferiorly - ANSWER-Descending aorta
What are the three branches off the aortic arch? - ANSWER-Brachiocephalic trunk, Left
common carotid, left subclavian
What is unique about the Circle of Willis - ANSWER-The Circle of Willis has a unique
feature of providing alternate circulation in case one of the arteries becomes blocked
with Verified Solutions
T or F: The cardio vascular system is the study of the organs of the body - ANSWER-
false: It is the study of the heart, blood vessels.
T or F: The tough, thick sac that encloses the heart and anchors it to the diagram is the
pericardium - ANSWER-True
T or F: The abdominal cavity contains the heart - ANSWER-False- pericardial cavity
inside the thoracic cavity
Which layer of the heart is continuous with the blood vessels linings? - ANSWER-
Endocardium
T or F: The left ventricle faces anteriorly, towards the sternum - ANSWER-False- the
right ventricle faces anteriorly (closest to the sternum)
Describe the location of the heart to the diaphragm - ANSWER-The diaphragm is
located inferior to the heart. (The heart is located superior to the diaphragm)
The two upper chambers of the heart are called - ANSWER-Atria
The two lower chambers of the heart are called - ANSWER-Ventricles
How does the nervous system and endocrine system interact with the heart? -
ANSWER-The heart rate is regulated by the nervous system and endocrine system
which can increase or decrease the rate of the heartbeat and blood pressure
What is the purpose of the bulb? - ANSWER-The bulb portion is squeezed to inflate the
bladder with air
What is the purpose of valves inside the veins? - ANSWER-Prevents the backward flow
of blood
What portion is the pacemaker of the heart? - ANSWER-SA node
Following the bundle of HIS, where does the electrical impulse travel next? - ANSWER-
Purkinje fibers
The impulse of the SA node causes contraction of the ______ - ANSWER-Atria
, What is an EKG? - ANSWER-A device used to measure electrical impulses in the heart
What is the P-wave? - ANSWER-Atrial depolarization and atrial systole
What is edema? - ANSWER-Fluid accumulation
What is Pulmonary edema? - ANSWER-Fluid in the lungs
Hypertension is blood pressure significantly higher than: - ANSWER-120/80
What is the purpose of the fossa ovalis in the fetus - ANSWER-It allows fetal blood to
move directly from right to left atrium, bypassing the underdeveloped lungs can receive
oxygen once the baby is born
What is the purpose of the mitral valve? - ANSWER-The mitral valve (bicuspid) controls
the flow of blood from the left atrium into the left ventricle.
What is the purpose of veins? - ANSWER-Veins carry blood back to the heart
T or F: Veins are primarily responsible for the vessels ability to control peripheral -
ANSWER-False- The arterioles
How does the contraction and relaxation of the arterioles help to control blood
pressure? - ANSWER-Contracting the arterioles increases the blood pressure through
decreasing the available volume. Relaxation of the arterioles decreases blood pressure
as the volume increases.
What does compliance mean? - ANSWER-Stretch with little recoil.
What are the three layers of a vessel - ANSWER-Tunica externa (superficial), tunica
media, Tunica intima (closest to the lumen)
T or F: Only arteries contain tunica media. - ANSWER-False- all vessels contain three
layers but in differing proportions
Capillaries are interconnected to form - ANSWER-Capillary beds
The aortic arch becomes the _____ as it moves inferiorly - ANSWER-Descending aorta
What are the three branches off the aortic arch? - ANSWER-Brachiocephalic trunk, Left
common carotid, left subclavian
What is unique about the Circle of Willis - ANSWER-The Circle of Willis has a unique
feature of providing alternate circulation in case one of the arteries becomes blocked
