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21 terms

Physioex

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The heart is to a pump as
Blood vessels are to pipes
Blood flow depends on:
All of the above
In the body, what are three major factors that govern resistance in blood flow?
Blood vessel radius, blood vessel length and blood viscosity
Vasoconstriction increases resistance:
True
A significant build-up of lipid deposits in a person's arteries will ____________ blood flow and ___________ resistance?
Decrease/increase
Poiseuille's equation states that the __________ has the strongest effect on blood flow?
Radius of the blood vessel
Which pressure setting in this PhysioEx exercise had the highest flow rate:
225 mm Hg
The graph in activity 1 demonstrates that flow and pressure
positive, linear
Consider this: Blood is flowing down an artery and that artery bifurcates (branches in two directions). The first branch maintains the same radius as the artery before the bifurcation. The second branch is composed of many smaller vessels that together, equal the total radius of the first branch. What is true about the two branches?
The second branch has more resistance than the first.
How is the graph in activity 2 different from the graph in activity 1?
increases exponentially
Blood consists of what?
all are components
In which of the following would the most resistance be observed?
Blood with a high hematocrit and in a vessel with a small radius
In activity 4, which blood vessel has the maximum flow speed?
10 mm long vessel
Diastole/Systole represent:
When ventricles are relaxed/when the atria contract
The amount of blood each ventricle pumps per minute is the:
cardiac output
Clinical hypothetical: You are an ER physician at UMC in Lubbock, TX. A patient presents with complaints of itching and headaches. The patient also has a severe bruise on their leg that may indicate a deep vein thrombosis (DVT). Standard protocol dictates that you run blood tests. The test indicates an extremely high hematocrit in addition to the somatic symptoms. Based on the symptoms and what you've learned in this lab, what is a possible diagnosis.
Polycythemia vera
If an individual has a low hematocrit, his/her blood viscosity will likely be _______________
low
middle beaker
left side of the heart
If a patient has high blood pressure, it is a good idea to push IV fluids.
no
Laminar flow describes the quick, rough manner in which blood flows along the length of the vessel.
false
Which of the following is not an endocrine hormone?
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