During Diastole, pressure inside the ventricle drops to near zero, but pressure inside the aorta only decreases to 80 mmHg. Pressure remains elevated in the aorta because O The walls are elastic Blood is flowing so fast Smooth muscles are actively contracting O There is resistance to flow
During Diastole, pressure inside the ventricle drops to near zero, but pressure inside the aorta only decreases to 80 mmHg. Pressure remains elevated in the aorta because O The walls are elastic Blood is flowing so fast Smooth muscles are actively contracting O There is resistance to flow
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
Section: Chapter Questions
Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...
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Transcribed Image Text:During Diastole, pressure inside the ventricle drops to near
zero, but pressure inside the aorta only decreases to 80
mmHg. Pressure remains elevated in the aorta because
The walls are elastic
Blood is flowing so fast
Smooth muscles are actively contracting
There is resistance to flow
Expert Solution
Step 1
Diastole is the period of the cardiac cycle where the chambers are filled with blood. This happens right after systole where the heart undergoes contraction (systole) to release blood from the ventricles. During diastole, the cardiac muscles are at a state of relaxation. At the beginning of diastole, the muscles of both the atria and ventricles are relaxed. During this time period, the ventricles are filled after which a short atrial systole follows.
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