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BIO Ch. 10 Quiz

Terms in this set (10)

Which of the following occurs as vessel radius increases?

-Resistance increases
-Pressure decreases
-Flow rate decreases
-Flow rate increases
-More than one of the above are correct
-More than one of the above are correct
Which of the following statements is false?

-The larger the difference in pressure between the beginning and end of a vessel, the greater the rate of blood flow
-As blood vessel diameter decreases, resistance increases
-As resistance in a blood vessel increases, rate of blood flow increases
-A highly viscous fluid will have high resistance
-The viscosity of blood increases with an increase in the number of red blood cells
-As resistance in a blood vessel increases, rate of blood flow increases
What creates the pressure gradient needed for blood to flow through the body?

-Atrial contraction
-The radius of blood vessels
-Red blood cells
-Ventricular contraction
-Resistance created by blood vessels
Ventricular contraction
Why is it important that arteries are distensible (stretchy)?

-It allows them to transport blood more rapidly
-It helps to "cancel out" or decrease the pressure being exerted by the heart
-It increases the resistance of the blood vessels, which increases the pressure gradient allowing blood to flow more rapidly
-It allows the arteries to store pressure and use it to create a pressure gradient during diastolecheck
-It allows the arteries to push nutrients out of the circulatory system more rapidly
It allows the arteries to store pressure and use it to create a pressure gradient during diastole
Which of the following statements is false regarding the measurement of blood pressure with a sphygmomanometer?

-The first sound heard is the systolic pressure
-Only turbulent blood flow can be heard through the stethoscope
-When the cuff pressure is greater than the diastolic pressure but less than the systolic pressure, blood flow is turbulent and can be heard
-When cuff pressure is less than diastolic pressure, blood flow is smooth and no sounds can be heard
-The second sound heard is diastolic pressure
The second sound heard is diastolic pressure
Which of the following describes pulse pressure?

-Can be used to determine an approximate mean arterial pressure
-Is the average driving pressure pushing blood through the body
-Is the pressure you feel when you take someone's pulse
-Is typically around 120/80 in a healthy individual
-More than one of the above are correct
More than one of the above are correct
When the arterioles constrict locally within an organ, which of the following occurs?

-Blood flow to the organ decreases
-Resistance of blood flow to the organ decreases
-Blood flow to the organ increases
-The radius of the arterioles increase
-More than one of the above are correct
Blood flow to the organ decreases
Which of the following is the primary factor that determines total peripheral resistance?

-Cardiac output
-Arteriole radius
-Distensibility of the arteries
-Pulse pressure
-Blood viscosity
Arteriole radius
What happens when total peripheral resistance increases?

-Cardiac output increases
-Cardiac output decreases
-Mean arterial pressure (MAP) decreases
-Mean arterial pressure (MAP) increases
-None of the above
Mean arterial pressure (MAP) increases
During exercise, cardiac output ________________ and total peripheral resistance ______________.

-Stays the same; increases
-Increases; decreases
-Decreases; decreases
-Increases; increases
-Increases; stays the same
Increases; decreases
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