MN551 Unit 3 Exam Questions and Answers Latest Version 2025 (Already Passed)
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MN551 Unit 3
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MN551 Unit 3
MN551 Unit 3 Exam Questions and Answers Latest Version 2025 (Already Passed)
Main function of the circulatory system - Answers Transport
Other functions of the circulatory system - Answers Delivers oxygen and nutrients to the tissues
Carries waste products from cellular metabolism to the kidn...
MN551 Unit 3 Exam Questions and Answers Latest Version 2025 (Already Passed)
Main function of the circulatory system - Answers Transport
Other functions of the circulatory system - Answers Delivers oxygen and nutrients to the tissues
Carries waste products from cellular metabolism to the kidneys and other excretory organs
Circulates electrolytes and hormones
Transports various immune substances that contribute to the body's defense mechanisms
True or false
The circulatory system helps regulate temperature - Answers True
Pulmonary circulation - Answers Moves blood through the lungs and creates a link with the gas
exchange function of the respiratory system
Systemic circulation - Answers Supplies all the other tissues of the body
Central circulaiton - Answers Blood that is in the heart and pulmonary circulation
Peripheral circulation - Answers Blood that is outside the central circulation
Similar characteristics of the pulmonary and systemic circulatory systems - Answers Both have a pump,
an arterial system, capillaries, and a venous system
Function of arteries and arterioles in the pulmonary and systemic circulatory systems - Answers Function
as distribution system to move blood to the tissues
Function of capillaries in the pulmonary and systemic circulatory systems - Answers Serve as an
exchange system where transfer of gases, nutrients, and wastes takes place
Function of venules and veins in pulmonary and systemic circulatory systems - Answers Serve as
collection and storage vessels that return blood to the heart
Components of pulmonary circulation - Answers Right heart
,Pulmonary artery
Capillaries
Veins
Components of systemic circulation - Answers Left hear
Aorta and its branches
Capillaries supplying the brain and peripheral tissues
Systemic venous system and the vena cava
Is the circulatory system open or closed - Answers Closed
True or false
The circulatory system is an open system in which the heart consisted of three pumps in series -
Answers False
The circulatory system is a closed system in which the heart consists of two pumps in series.
BP is broken down into what two components - Answers Arterial
Venous
Arterial blood pressure - Answers Higher pressure, 90-100 mm Hg
Propel blood to all other tissues of the body (systemic circulation)
,Propel blood through the lungs (pulmonary circulation)
Hemo - Answers Blood
Dynamic - Answers Refers to the relation between motion and forces
What describes the physical principles governing pressure, flow, and resistance as they relate to the
cardiovascular system - Answers Dynamic
Laminar blood flow - Answers Layering of blood components in the center of the blood stream
Reduces frictional forces and prevents clotting factors from coming in contact with the vessel wall
Turbulent flow - Answers Disordered flow
The blood moves crosswise and lengthwise in blood vessels
Describes the relation between wall tension, transmural pressure, and radius - Answers Laplace Law
Laplace law - Answers States that wall tension becomes greater as the radius increases
Wall tension is also affected by wall thickness; it increases as the wall becomes thinner and decreases as
the wall becomes thicker
Equation for compliance - Answers C=V/P
Describe the formula for compliance - Answers A change in volume (V) causes less of an increase in
transmural pressure (P) in a more compliant vessel.
True or false
A vein is 24 times more compliant than its corresponding artery - Answers True
Pericardium function - Answers Forms a fibrous covering around the heart holding it in a fixed position
and providing physical protection and a barrier to infection
Myocardium function - Answers Muscular portion; forms the wall of the atria and ventricles
Endocardium function - Answers Thin three-layered membrane lining the heart
, One-way valve function - Answers Atrioventricular valves and semilunar valves are pressure valves that
ensure one way flow
Fibrous skeleton function - Answers Provides structural support and isolating force electrical impulse
Blood flow is not based on which of the following properties?
A.Pressure
B.Vessel compliance
C.Volume
D.Contraction of the heart
E.Distensibility of vessels
F. All the above - Answers F. All the above
Rationale: All the above are contributing factors to the flow of blood.
Used to describe the rhythmic pumping action of the heart - Answers Cardiac cycle
What are the 2 parts of the cardiac cycle - Answers Systole
Diastole
Systole - Answers The period during which the ventricles are contracting
Diastole - Answers The period during which the ventricles are relaxed and filling with blood
Main Atrial Pressure Waves Occurring During the Cardiac Cycle - Answers A wave
C wave
V wave
A wave - Answers Caused by atrial contraction
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