Doctors use stethoscopes to hear the sound produced during each cardiac cycle. The second sound is heard when
A. AV nodes receives signal from SA node
B. All valves open up
C. Ventricular walls vibrate due to gushing in of blood from atria
D. Semilunar valves close down after blood flows into vessels from ventricles
Select your answer:
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Circulatory System and Nutrition Population Ecology Urinary Life Processes Excretion Immunisation DNA Replication Transportation Blood Pressure Cellular Respiration Laboratory Careers Weight Management Pathogens, Disease and Immunity Musculoskeletal LE Food for Thought Pain ManagementOther quiz:
Cardiovascular System › ViewIdentify #1 in the image:
A. Right Atrium
B. Left Atrium
C. Right Ventricle
D. Left Ventricle
Ecology › View
These cause variations.
A. mutations
B. adaptations
C. a desire to change
D. injuries