Quiz 1

Question 1

A 32 year old patient presents to the vascular lab with visible varicose veins. When taking her history, she states that she had a previous deep vein thrombosis during pregnancy. Would you expect the varicose veins you see to be primary or secondary and why?

Answer 1

Secondary because of her past DVT history

Question 2

What is major physiology component governing blood flow in the venous system?

Answer 2

hydrostatic pressure, transmural pressure, and venous capacitance

Question 3

In laminar flow, the cell layers at the center of the vessel move ________ the layers closest to the cell wall.

Answer 3

faster than

Question 4

___________ is the law that states that the volume of flow of a liquid flowing through a vessel is directly proportional to the pressure of the liquid and the fourth power of the radius, and is inversely proportional to the viscosity of the liquid and the length of the vessel.

Answer 4

Poiseuilles law

Question 5

How do veins vary their resistance to blood flow? Which venous characteristics present with low transmural pressure?

Answer 5

Veins can have high or low transmural pressure depending on their resistance. In low transmural pressure the veins loose their circular shape and can be come elliptical shaped.

Question 6

Reflux of blood in the veins is prevented by:

Answer 6

valves

Question 7

Flow that travels smoothly in parallel layers is called _______ flow

Answer 7

Laminar

Question 8

The energy of work or motion is:

Answer 8

Kinetic energy

Question 9

The pressure within the vascular system because of the weight of a column of blood is:

Answer 9

hydrostatic pressure

Question 10

According to Bernoullis Principle, when high velocity is demonstrated you will also see:

Answer 10

Low pressure

Question 11

When conditions are normal, the expiration phase of respiration will results in:

Answer 11

Increased pressure in the chest cavity, a decrease in intra-abdominal pressure and a reverse of IVC collapse

Question 12

When defining pressure flow relationships in the vascular system and considering flow through a narrow tube, _______ has a significantly higher impact on flow than the _______.

Answer 12

radius, length

Question 13

Under normal circumstances with exercise, blood flow will increase to __________ the resting value

Answer 13

3-5 times

Question 14

The flow profile demonstrated at the entrance of a vessel is:

Answer 14

plug flow

Question 15

The major component of the blood that influences viscosity is:

Answer 15

hematocrit

Question 16

This aids in the return of blood to the heart against hydrostatic pressure:

Answer 16

calf-muscle pump

Question 17

The medical term for swelling or excessive accumulation of fluid in cells, tissues or body cavities is:

Answer 17

edema

Question 18

Stored or resting energy is:

Answer 18

Potential energy

Question 19

The tendency for a body at rest to stay at rest or a body in motion to stay in motion is:

Answer 19

intertia

Question 20

Abnormal retrograde flow in veins is also known as:

Answer 20

venous valvular insufficiency