DBS 560 Mid Term UPDATED ACTUAL
Questions and CORRECT Answers
Another name for the iliac arteries are? - CORRECT ANSWER Hypogastric arteries
Name the layers of the vessel walls. - CORRECT ANSWER 1. Tunica intima (innermost)
2. Tunica media (middle layer)
3. Tunica adventitia (outermost layer)
What is the role of arterioles and how do they do it? - CORRECT ANSWER They are the
"stopcocks" of the vascular system. They are the principle point of resistance to blood flow.
What are the branches of the aortic arch? - CORRECT ANSWER brachiocephalic artery, left
common carotid artery, left subclavian artery
Anatomical marker for the common femoral vein is? - CORRECT ANSWER inguinal ligament
What vessels form the dorsalis pedis? - CORRECT ANSWER anterior tibial artery
What is the highest and lowest points of pressure in the body? - CORRECT ANSWER Highest -
left ventricle
Lowest - right atrium
Blood moves from ____ pressure to ____ pressure. - CORRECT ANSWER high to low
What is Bernoulli's principle? - CORRECT ANSWER as the velocity of a fluid increases, the
pressure exerted by the fluid decreases
What is Poiseuille's Law? - CORRECT ANSWER Q = pie (P1-P2)r^nl
, What factor in Poiseulle's law has the greatest impact on flow? - CORRECT ANSWER vessel
radius
How does resistance change when there are multiple stenosis in a row VS. parallel to a stenosis? -
CORRECT ANSWER Multiple stenosis along the same blood vessel will increase the total
resistance.
The more parallel elements in a network, the lower the total resistance.
What is a reflected wave? - CORRECT ANSWER As the flow traveling down the vessel
encounters the high-resistance arteriolar bed, some flow is reflected back up the vessel called reflected
wave.
What is the Reynolds number? - CORRECT ANSWER predicts whether flow is laminar or
turbulent
Re < 1500 = laminar
Re > 2000 = turbulent
What are the 3 types of flow and where they are found? - CORRECT ANSWER 1. Plug - found at
the entrance to a vessel, all elements of blood flow stream will have the same velocities.
2. Laminar - found at a distance equal to several tube diameters away from entrance.
3. Turbulent - found distal to an obstruction or sharp turn.
What is the percentage of total blood volume held by the venous system? - CORRECT
ANSWER 66% to 67%
What happens in a critical stenosis? - CORRECT ANSWER Degree of narrowing at which pressure
and flow begin to be affected. Occurs when cross-sectional area has been reduced by 75% (diameter
reduction of 50%)
What is the smallest vessel in the body and what is its function? - CORRECT ANSWER Capillaries
and function is exchange of nutrients and waste occurs.
Questions and CORRECT Answers
Another name for the iliac arteries are? - CORRECT ANSWER Hypogastric arteries
Name the layers of the vessel walls. - CORRECT ANSWER 1. Tunica intima (innermost)
2. Tunica media (middle layer)
3. Tunica adventitia (outermost layer)
What is the role of arterioles and how do they do it? - CORRECT ANSWER They are the
"stopcocks" of the vascular system. They are the principle point of resistance to blood flow.
What are the branches of the aortic arch? - CORRECT ANSWER brachiocephalic artery, left
common carotid artery, left subclavian artery
Anatomical marker for the common femoral vein is? - CORRECT ANSWER inguinal ligament
What vessels form the dorsalis pedis? - CORRECT ANSWER anterior tibial artery
What is the highest and lowest points of pressure in the body? - CORRECT ANSWER Highest -
left ventricle
Lowest - right atrium
Blood moves from ____ pressure to ____ pressure. - CORRECT ANSWER high to low
What is Bernoulli's principle? - CORRECT ANSWER as the velocity of a fluid increases, the
pressure exerted by the fluid decreases
What is Poiseuille's Law? - CORRECT ANSWER Q = pie (P1-P2)r^nl
, What factor in Poiseulle's law has the greatest impact on flow? - CORRECT ANSWER vessel
radius
How does resistance change when there are multiple stenosis in a row VS. parallel to a stenosis? -
CORRECT ANSWER Multiple stenosis along the same blood vessel will increase the total
resistance.
The more parallel elements in a network, the lower the total resistance.
What is a reflected wave? - CORRECT ANSWER As the flow traveling down the vessel
encounters the high-resistance arteriolar bed, some flow is reflected back up the vessel called reflected
wave.
What is the Reynolds number? - CORRECT ANSWER predicts whether flow is laminar or
turbulent
Re < 1500 = laminar
Re > 2000 = turbulent
What are the 3 types of flow and where they are found? - CORRECT ANSWER 1. Plug - found at
the entrance to a vessel, all elements of blood flow stream will have the same velocities.
2. Laminar - found at a distance equal to several tube diameters away from entrance.
3. Turbulent - found distal to an obstruction or sharp turn.
What is the percentage of total blood volume held by the venous system? - CORRECT
ANSWER 66% to 67%
What happens in a critical stenosis? - CORRECT ANSWER Degree of narrowing at which pressure
and flow begin to be affected. Occurs when cross-sectional area has been reduced by 75% (diameter
reduction of 50%)
What is the smallest vessel in the body and what is its function? - CORRECT ANSWER Capillaries
and function is exchange of nutrients and waste occurs.
