Study your flashcards anywhere!

Download the official Cram app for free >

  • Shuffle
    Toggle On
    Toggle Off
  • Alphabetize
    Toggle On
    Toggle Off
  • Front First
    Toggle On
    Toggle Off
  • Both Sides
    Toggle On
    Toggle Off
  • Read
    Toggle On
    Toggle Off

How to study your flashcards.

Right/Left arrow keys: Navigate between flashcards.right arrow keyleft arrow key

Up/Down arrow keys: Flip the card between the front and back.down keyup key

H key: Show hint (3rd side).h key

A key: Read text to speech.a key


Play button


Play button




Click to flip

18 Cards in this Set

  • Front
  • Back
Plasma Constituents
Electrolytes (Na, K, Ca, Mg...)
Proteins (Albumins, Globulins, Fibrinogen)
Gases - CO2, O2, N2
Glucose, Cholesterol, Urea
Flow Rate
Amount of Vol flowing in a time interval

Controlled by pressure difference at beginning and end of vessel

Also depends on diameter of the vessel (lg=more flow)

Inversely proportional to resistance (flow=1/R)

Determined by MAP (depends on TPR and CO)

Length of Vessel inversely influences Flow

Viscosity inversely influences flow

****Take home - A very little amount of constriction on a vessel causes HUGE decreases in Flow
Driving force that is applied to make a fluid flow (pressure difference) High to low
Property of a fluid to resist the impostition of flow (caused by fluid's viscosity)

Resistance = 1/radius to the fourth power

Resistance is summative if in a serial arrangement, although if R1+R2+R3, R2 is the greatest resistance, then Rtotal = R2
Principle 1
Blood flows according to its pressure gradient

Conductances are additive in a parallel arrangement

Capillary beds have little flow resistance b/c of the great # of capillaries which sum their conductance and therefore decrease/limit resistance
Longitudinal Pressure Profile
The segment with the highest resistance experiences the greatest percent pressure change

ie. Carries 80% of resistance, then sees 80% of pressure change
Dominant Resistance vessels
Transmural Pressure is influenced by:
1. Pumping pressure of the heart (pressure gradient from left to right heart)
2. Compliance of Blood Vessels (elasticity) The more compliant, the more blood storage
3. Hydrostatic Pressure
Velocity and Capillaries
Blood flow and velocity is slowest here b/c of the greater combined cross section of all capillaries
Good for Diffustion
Laminar vs. Turbulent Flow
Laminar - smooth parallel (energetically most favorable)
(most blood flow)
Turbulent - Non-parallel movements; FAST, heart beat; determined by velocity, diameter and viscosity
Heart circulation
Corotid Artery
Equation for Flow
Flow = 1/R x Delta P

1/R= Conductance

P = pressure
Flow Resistance Equation
R ~ nL/r to the 4 fourth

n = viscosity
L = Length
r = radius
Combined Resistance in Parallel Arrangement
is reversely addiditive; hence it decreases in organs/capillary beds
Serial Arrangements
Resistance is additive
Conductance is inversely additive (hence it decreases)
If you constrict just one vessel, you greatly reduce overall flow
Serial vs Parallel arrangement
Each class of vessels (arteries, capillaries, and veins) are arranged serially

Within each serial, the venules are arranged in parallel
Resistance of Dominant segment
If the resistance in the dominant high resistance segment changes, this will change the overall pressure profile in a serial arrangement

ie. vasodilation - does not effect upstream artery but does increase P in downstream capillaries (hose)

ie. vasoconstriction - decreases P in downstream cappilaries and increases P in upstream Artery