Chapter 13 Cardiac Physiology Flashcards
What is the function of the cardiac/circulatory system
Transportation, Regulation, Protection
What is blood composed of
Arterial Blood - Bright Red
Venous blood - Dark Red
Plasma
Red Blood Cells (RBC)
White Blood Cells (WBC)
Platelets
What are formed elements within blood
RBC’s
WBC’s
Megakaryocytes (Platelets)
What is the function of RBC
Bends and squeeze through circulatory system, binds oxygen, carries CO2, and expels waste
What are the subtypes of WBC’s
Neutrophils: Phagocytize pathogens
Eosinophils: Allergy response
Basophiles: Attacks parasites
Lymphocytes: Regulate immune system, produce antibodies
What are the steps of blood clotting
- Vasoconstriction
- Platelet Clotting
- Fibrin Web
What is the factor that helps with clotting
Von Willabrand Factor (VWF)
What are platelets made out of
Fibrinogen (inactive) –> Fibrin (active)
What is tri it before you bi it
The order of the valves RA and RV to LA and LV
How are the valves opened
mechanically due to difference in pressure
What is a heart murmur
Mixing of blood from (usually) left ventricle/atrium to right ventricle/atrium
What is systole
Ventricles contract, atrium relax
What is Diastole
Atrium contract, ventricles relax
What are the nodes of the heart
SA node - pacemaker
AV node - second step, sends signal to bundle of HIS
Bundle of HIS - sends message to the Perkinje fibers
Draw out the Atrium action potential and label it
slow waves, fast acting, Calcium depolarizes the atrium, potassium repolarizes the atrium
