Pharmacology - Chapter 42 - Review of Hemodynamics Flashcards
The circulatory system includes….
blood, blood vessels, arteries, veins, etc.
What is the function of the circulatory system?
Delivery of oxygen, nutrients, and removal of carbon dioxide and metabolic waste.
What are the divisions of the Cardiovascular System? (2)
Pulmonary and Systemic!
What is the “pump” of the circulatory system?
The HEART!
What is the blood volume in humans? (and breakdowns.)
~ 5 liters of blood (9% in pulmonary circulation, 7% in heart, 84% systemic.)
Systemic - 84% of blood = (breakdown.)
64% in venous system, 20% arterial system.
Blood flows from ___ to ___ pressure.
Greater to lesser pressure.
the ___ the vessel, the ___ the resistance and higher the blood blood.
larger/smaller.
What is the average cardiac output of an adult?
~ 5 liters/min.
Cardiac output =
CO = HR X Stroke Volume. (like 70 bpm x 70 ml = 4.9 L/Min.)
Heart rate - controlled by…
ANS.
Stroke Volume - controlled be….
Myocardial contractility/preload (amount of force prior to contraction)/after load (amount of force in order to contract.)
Starling’s Law - def
the force of ventricular contraction is proportional to muscle fiber length (when more blood enters heart, more blood is pumped out.)
Systemic filling pressure = ______.
Force of returning blood to the heart (most important point in pharmacology.)
Systemic Filling pressure can be - Increased or Decreased - info on those.
Increased by vasoconstriction or increased blood volume.
Decreased by vasodilation or decreased blood volume.
