cardiovascular system exercise answers (1)

cardiovascular system exercise answers (1) -...

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Cardoiovascular Exercise Sheet Answers Cardiovascular System: Intrinsic Conduction System 1. autorhythmic cardiac, impulses (action potentials) 2. heart depolarization 3. a. initiates the depolarizing impulse and sets the pace for the entire heart b. link between the SA node and the AV node c. delay occurs allowing atria to contract d. link between atria and ventricles e. convey impulses down the interventricular septum f. convey the depolarizations throughout the ventricular walls 4. contractile 5. ECG—electrocardiogram (or EKG) 6. a. atrial depolarization b. ventricular depolarization c. ventricular repolarization 7. QRS complex 8. atrial, contraction 9. QRS complex 10. tachycardia Cardiovascular System: Cardiac Action Potential 1. Through gap junctions 2. contract 3. 1. sodium, into 2. potassium, out of 3. fast calcium, into 4. positive 5. decreased, potassium, sodium 6. –40, fast calcium channels 7. potassium, repolarization 8. Na + -K + ATPase 9. Sarcoplasmic reticulum 10. Sodium, calcium, and potassium 11. a. fast sodium channels b. slow calcium channels c. potassium channels 12. Sodium channels 13. Calcium channels Cardiovascular System: Cardiac Cycle 1. differences in blood pressure 2. Chamber Valve Chamber/Vessel Right ventricle Pulmonary semilunar Pulmonary trunk Left ventricle Aortic semilunar Semilunar aorta
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Left atrium Mitral Left ventricle Right atrium Tricuspid Right ventricle 3. a. mid to late, diastole b. atrioventricular, AV 4. Intraventricular pressure is greater than atrial pressure.
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