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physioex 5: activity 1 questions and answers rated A+ 2024/2025
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physioex 5: activity 1 questions and answers rated A+ 2024/2025
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physioex 5: activity 1what is blood measured in? - ANSml/min
what has the greatest effect on blood flow? - ANSblood vessel radius
the diameter of the blood vessel is the same as - ANStwo times the radius of the blood vessel
the opening of the blood vessel where the blood flows is called the... - ANSlumen
what do you think will happen to the flow rate if the radius is increased by 0.5 mm? - ANSthe
flow rate will increase
do you think a graph plotted with radius on the x-axis and flow rate on the y-axis will be linear
(straight line)? - ANSno
what is the driving force for blood flow? - ANSpressure gradient
how does the body increase the blood vessel radius? - ANSsmooth muscle relaxation
what was the variable that we altered in the activity? - ANSvessel radius
vessel radius and fluid flow - ANSare directly proportional
after a heavy meal, when we are relatively inactive, we might expect blood vessels in the
skeletal muscles to be somewhat _________________ and the blood vessels in the digestive
organs to be somewhat ______________________ - ANSconstricted, dilated
what happens when you increased the flow tube radius, the fluid flow rate... - ANSincreases
explain how the body established a pressure gradient for fluid flow - ANSthe pressure gradient
is first established by adding blood into the elastic arteries. The left ventricle ejects a volume of
blood into the aorta which stretches as it receives the volume and the blood creates pressure.
Blood will flow down the peripheral veins, the difference in blood pressures between the aorta
and the peripheral veins is the pressure gradient.
explain the effect that the flow tube radius change had on flow rate - ANSresistance to flow is
directly proportional to the viscosity of the fluid and the length of the vessel that the blood flows.
describe the effect that radius changes have on the laminar flow of a fluid - ANSwhen the
diameter of a blood vessel increases, the flow rate increases and the likelihood of nonlaminar
flow occurs
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