3. What changes occur in the volume, pressure, AV and semilunar valves during the ejection phase of the cardiac cycle. and 4. What is cardiac output and what factors affect it?
3. What changes occur in the volume, pressure, AV and semilunar valves during the ejection phase of the cardiac cycle. and 4. What is cardiac output and what factors affect it?
Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
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Transcribed Image Text:3. What changes occur in the volume, pressure, and
AV and semilunar valves during the ejection phase
of the cardiac cycle.
4. What is cardiac output and what factors affect it?
Expert Solution
Step 1
- The cardiac cycle is the sequence of events that occur during one complete heartbeat.
- Each heartbeat involves two major periods called the systole and the diastole.
- The contraction phase of the ventricular chamber is called systole, and the relaxation phase is called diastole.
- At a normal heart rate, it takes 0.8 seconds for one cardiac cycle.
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