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Flashcards in Physiology and Hemodynamics Deck (22)
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1
Q

Each beat pumps about how many milliliters of blood into the aorta causing a blood pressure pulse?

A

70mL

2
Q

Increase heart rate delivers an increased blood what?

A

volume

3
Q

Cardiac output determines the amount of blood entering arterial system; arterial pressure and total _____, determines the amount that leaves it?

A

peripheral resistance

4
Q

Concerning flow, lower resistance = ________ and higher resistance = __________

A

high flow rate and low flow rate

5
Q

The total energy contained in moving fluid is the sum of _____, ______, and ________ energies?

A

pressure, kinetic, and gravitational

6
Q

What is another name for pressure energy?

A

Potential or Stored

7
Q

What is the major form of energy (E) for circulation of blood?

A

Pressure (potential/stored) energy.

8
Q

________ is equivalent to the weight of the column of blood extending from the heart to the level where pressure is measured?

A

Hydrostatic Pressure.

9
Q

A ________ is needed to moved blood from one point to another. The greater the _______, the greater the flow?

A

Energy Gradient.

10
Q

Resistance id directly proportional to variables in numerator :(______ and ______)

A

Viscosity and Length

11
Q

Although viscosity and vessel length have an effect on resistance, a change in vessel _______ has a more dramatic effect.

A

Diameter.

12
Q

If viscosity increases, velocity ______

A

decreases.

13
Q

If viscosity decreases, velocity ________

A

increases.

14
Q

Poiseuille’s Equation defines the relationship between: _____, ______, and _______

A

pressure, volume flow, and resistance.

15
Q

Poiseuille’s Equation also helps define how much __________ moves through a vessel.

A

fluid volume.

16
Q

What is Poiseuille’s Equation?

A

Q=P/R

Q-Volume Flow, P-Pressure, R-Resistance

17
Q

_______ change has the most dramatic effect on resistance?

A

Diameter.

18
Q

Radius of a vessel is _____ proportional to volume flow.

A

Directly.

19
Q

Velocity and Pressure are _______ related?

A

Inversely.

20
Q

What is the number in Reynold’s Number when laminar flow tends to become disturbed.

A

> 2000

21
Q

Vasoconstriction- Pulsatile changes in medium/small sized arteries of the limbs are ______. When this occurs, pulsatility changes are usually ________ in the minute arteries.

A

Increased, Decreased.

22
Q

Vasodilatation- Pulsatile changes in medium/small sized arteries of the limbs are _________. When this occurs , pulsatility changes are ________ in minute arteries.

A

Decreased, Increased.