During Diastole, pressure inside the ventricle drops to nearzero, but pressure inside the aorta only decreases to 80mmHg. Pressure remains elevated in the aorta becauseThe walls are elasticBlood is flowing so fastSmooth muscles are actively contractingThere is resistance to flow

Answered: During Diastole, pressure inside the…

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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Question

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.