Date UNIT 15 REVIEW Check Your Understanding Critical Thinking and Application Q

Question

Date UNIT 15 REVIEW Check Your Understanding Critical Thinking and Application Questions When the pericardium fills with blood, it produces a condition called cardioc tamponade, Why is this condition so dangerous? (Hint: Consider the structure of the fibrous which can be rapidly lethal 2 High pressure in the systemic and pulmonary circuits often results in ventricular hypertrophy, in which the enlarges to pump against greater force. Which side(s) of the heart would be affected by circuit? Which side(s) of the heart would be affected by high pressure in the systemic dircuit? Explain. high pressure in the pulmonary 3 One potential cause of valve dysfunction is rupture of the chordae tendineae. Why would this lead to valve dysfunction Would this affect the atrioventricular valves, the semilunar valves, or both? Explairn. Cardiovascular System-Part I: The Heart uNIT 15 389

Explanation / Answer

1. The fibrous pericardium is not distensible, which causes the blood to put pressure on the heart, constricting it and reducing its ability to contract

2.the right side of the heart pumps in to the pulmonary circuit and is therefore the side affected by pulmonary hypertension The left side of the heart pumps into the systemic circuit and is therefore the side affected by systemic hypertension.

3. this would only affect the AV valves because SL valves do not attach to chordae tendineae. If the chordae rupture, then the papillary muscles cannot keep the valve leaflets taut. This causes the valve leaflets to prolapse back into the atrium and blood to leak backwards when the ventricles contract.

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