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Heart I
Stack #207856
| Question | Answer |
|---|---|
| The heart is a cone-shaped muscular organ located within the _______ of the thorax. | Mediastinum |
| The hearts apex rests on what? | Diaphragm |
| The superior margin of the heart lies at the level of which rib? | second |
| Approximately two thirds of the heart mass is seen to the left of what? | Midsternal |
| The loosely fitting outer layer of the heart is called what? | Fibrous pericardium. |
| The middle layer of the heart wall is what? | Parietal pericardium |
| The inner layer of the heart wall is called what? | Visceral pericardium |
| The visceral pericardium is also called what? | Epicardium |
| The function of the fluid that fills the pericardial sac is to decrease what during heart activity? | Friction |
| What is the middle layer of the heart wall called? | Myocardium |
| The myocardium is composed of what? | Cardiac muscle |
| Connective tissue that ramify throughout the myocardium constuct the so-called _____ of the heart. | Bundles |
| The membrane that lines the heart and also forms the valve flaps is what? | endocardium |
| The heart has how many chambers? | Four |
| Wich of the two are the recieving chambers? | Atriums |
| Which two are the discharging chambers? | Ventricles |
| Teeh-shaped bundles of smooth muscle, found only in the auricles, are called what? | Pectinate muscles |
| Irregular ridges of the muscles in the ventricles are what? | Trabeculate muscles |
| What prevents backflow into the ventricles when the heart is relaxed? | ASV and PSV |
| What prevents backflow into the atria when the ventricles are contracting? | Tricuspid and Bicuspid |
| What is an AV valve with three flaps? | Tricuspid |
| What is an AV valve with two flaps? | Bicuspid |
| What is the pacemaker of the purkinje system? | SA node |
| What is the point in the purkinje system where the impulse is temporarily delayed? | AV node |
| What condition results from prolonged coronary blockage? | Myocardial infarction |
| What is an abnormal pacemaker? | Ectopic focus |
| What allows backflow of blood? | Incompetent valve |
| Because of cardiac decompenssation, circulation is inadequate to meet tissue needs is what? | Congestive heart failure |
| What is a slow heartbeat, that is, below 60 beats per minute? | Bradycardia |
| What is a condition in which the heart is uncoordinated and useless as a pump? | Fibrillation |
| What is a rapid heartrate, that is, over 100 beats per minute? | Tachycardia |
| Damage to the AV node, totally or partially releasing the ventricles from the control of the SA node. | Heart block |
| What is a chest pain, resulting from ischemia of the myocardium? | Angina pectoris |
| What is a result of initial failure of the left side of the heart? | Pulmonary congestion |
Created by:
fadka5
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