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Flashcards in CARDIOVASCULAR Deck (222)
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1

Cardiac output from the eft side of the hear is the __________

systemic blood flow

2

Cardiac output from the right side of  the hears is the ________________

pulmonary blood flow

3

Direction of blood flow

  • lungs to the left atrium via the PULMONARY VEIN
  • left atrium to the left ventricle through the MITRAL VALVE
  • left ventricle to the aorta through the AORTIC VALVE
  • from the aorta to the systemic arteries and the systemic tissues
  • from tissues to the systemic veins and vena cava
  • vena cava to the Right atrium
  • RA to the RV through TRICUSPID VALVE
  • RV to the pulmonary artery though PULMONIC VALVE
  • pulmonary artery to the lungs for oxygenation

4

Deliver oxygenated blood to the tissues

Arteries

5

site of highest resistance in the cardiovascular system

arterioles

  • arteriolar resistance is regulated by the ANS

6

________receptors are found on the arterioles of the skin, splanchnic, and renal circulations

alpha 1

7

____________ receptors are found on arterioles of skeletal muscle

B2 adrenergic

8

have te largest total cross sectional and surface area

Capillaries

9

Formed from merged capillaries

Venules

10

Under low pressure

contain the highest proporrtion of blood in the cardiovascular system

Veins

(the blood volume is called unstessed volume)

have alpha 1 adrenergic receptors

11

Velocity of blood flow can be expressed by this equation

v= Q/A

  • v = velocity (cm/sec)
  • Q = blood flow (ml/min)
  • A = cross sectional area (cm2)

12

Velocity is directly proportional to _____________

blood flow

13

Velocity is inversely proportion to  the ______

cross sectional area

14

Blood flow can be expressed by the these equations _______________

15

The quation for blood flow (or cardiac output) is analogous to ________

Ohm's law

16

____________ equation gives factors that change the resistance of blood vessels 

Poiseuille's

 

17

Resistance is directly proportional to ____________ 

viscosity of blood

18

Resistance is directly proportional to _____________

length of vessel. 

19

Resistance is inversely proportional to the _______________

fourth power of the vessel

20

____________ resistance is illustrated by the systemic circulation

Parallel

21

When an artery is added in parallel, the total resistance ______________

decreases

22

___________resistance is illustrated by the arrangement if blood vessels within a given organ

Series

 

23

straight line (streamedlined) flow

Laminar flow

24

predicts whether blood flow will be laminar or turbulent

Reynauld's number

25

When reynauld's number is increased, there is a greater tendency for _________

turbulence

26

Factors affecting Reynold's number

Decreased viscosity

Increased velocity

27

consequence of the fact that the adjacent layers of blood travel at different velocities within a blood vessel

Shear

28

velocity of blood is __a___ at the wall and ___b____ at the center of the vessel

a= zero

b= highest

29

Shear is highest at the ___________

wall

30

Decribes the distensibility of blood vessels

inversely related to elastance or stiffness

Capacitance