Physioex 5: activity 1 Exam Questions and Answers Already Passed Graded A+
what is blood measured in? - Answers ml/min
what has the greatest effect on blood flow? - Answers blood vessel radius
the diameter of the blood vessel is the same as - Answers two times the radius of the blood vessel
the opening of the blood vessel where the blood flows is called the... - Answers lumen
what do you think will happen to the flow rate if the radius is increased by 0.5 mm? - Answers the 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)? - Answers no
what is the driving force for blood flow? - Answers pressure gradient
how does the body increase the blood vessel radius? - Answers smooth muscle relaxation
what was the variable that we altered in the activity? - Answers vessel radius
vessel radius and fluid flow - Answers are 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 ______________________ - Answers constricted, dilated
what happens when you increased the flow tube radius, the fluid flow rate... - Answers increases
explain how the body established a pressure gradient for fluid flow - Answers the 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 - Answers resistance 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 - Answers when the diameter
of a blood vessel increases, the flow rate increases and the likelihood of nonlaminar flow occurs
why do you think the plot was not linear? (hint: look at the relationship of the variables in the equation)
- Answers the relationship between flow and radius is not linear, as flow is directly related to radius to
the 4th power
what is blood measured in? - Answers ml/min
what has the greatest effect on blood flow? - Answers blood vessel radius
the diameter of the blood vessel is the same as - Answers two times the radius of the blood vessel
the opening of the blood vessel where the blood flows is called the... - Answers lumen
what do you think will happen to the flow rate if the radius is increased by 0.5 mm? - Answers the 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)? - Answers no
what is the driving force for blood flow? - Answers pressure gradient
how does the body increase the blood vessel radius? - Answers smooth muscle relaxation
what was the variable that we altered in the activity? - Answers vessel radius
vessel radius and fluid flow - Answers are 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 ______________________ - Answers constricted, dilated
what happens when you increased the flow tube radius, the fluid flow rate... - Answers increases
explain how the body established a pressure gradient for fluid flow - Answers the 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 - Answers resistance 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 - Answers when the diameter
of a blood vessel increases, the flow rate increases and the likelihood of nonlaminar flow occurs
why do you think the plot was not linear? (hint: look at the relationship of the variables in the equation)
- Answers the relationship between flow and radius is not linear, as flow is directly related to radius to
the 4th power
