Chapter 12 - Heart

5 Written Questions

1. tricuspid valve
2. Right Left Atria, 2 upper chambers - single is called atrium / Right, Left Ventricles, 2 lower chambers
3. AKA Pacemaker, located posterior wall of right atrium, rhythmically initiates impulses causing the atria to contract at the same time
4. relaxation phase of the cardiac cycle
5. contraction phase of the cardiac cycle ( squeeezing blood out )

5 Multiple Choice Questions

1. From the AV Node, the impules travel along the artioventicular bundle, aka bundle of his - this then stimulates the Purkinje fibers - this cause the ventricles to contract together
   1. Bundle of His
   2. Layers
   3. Left AV
   4. Valves
2. Second part of the conduction system, located at the floor of the right atrium, causes a delay to allow the atria to finish emptying
   1. Mediastinum
   2. Structure
   3. Atrioventricular Node
   4. Semilunar Valves
3. Outer Most Layer - Epicardium, Middle Layer - Myocardium, muscle layer, thickest layer - Inner Layer Endocardium -smooth and seamless
   1. Septum
   2. Valves
   3. Layers
   4. Left AV
4. Sinoatrial Node - AKA SA / Artioventricular Node AK -AV Node / Bundle of His, Purkinje Fibers
   1. Sinoatrial Node / SA Node -
   2. Componets of Cardiac Conduction System
   3. Atrioventricular Node
   4. Mediastinum
5. cavity within thoracic cavity Between 2nd and 6th rib - size - approx size of your fist
   1. Diastole
   2. Right AV
   3. Septum
   4. Mediastinum

5 True/False Questions

1. Left AV → tricuspid valve

   True        False

2. Valves → Outer Most Layer - Epicardium, Middle Layer - Myocardium, muscle layer, thickest layer - Inner Layer Endocardium -smooth and seamless

   True        False

3. Structure → Heart if covered by a protective sac called the pericardium - filled with serous fluid

   True        False

4. Semilunar Valves → Antrioventricular Valves ( AK) separate the atria and ventricles

   True        False

5. Septum → biscupid / mitral valve

   True        False