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Portage Learning A&P 2 Module 2 Problem Set Questions and Answers | Latest Version | 2025/2026 | Correct & Verified
What valve prevents backflow from the pulmonary artery into the right ventricle?✔✔ Pulmonary semilunar valve
What valve is located between the left atrium and left ventricle?✔✔ Bicuspid valve
What valve prevents backflow into the left ventricle from the aorta?✔✔ Aortic semilunar valve
What blood vessel brings deoxygenated blood from the body to the right atrium?✔✔ Superior vena cava
What structure initiates the electrical impulse that causes the heart to beat?✔✔ Sinoatrial (SA) node 1 / 4
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What node receives the impulse from the SA node and delays it slightly?✔✔ Atrioventricular (AV) node
What fibers conduct impulses from the AV bundle through the interventricular septum?✔✔ Bundle branches
What fibers spread the electrical signal throughout the ventricles?✔✔ Purkinje fibers
What is the name of the process that includes one complete heartbeat?✔✔ Cardiac cycle
What is the term for contraction of the heart muscle?✔✔ Systole
What is the term for relaxation of the heart muscle?✔✔ Diastole 2 / 4
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What phase of the cardiac cycle occurs when the ventricles contract?✔✔ Ventricular systole
What phase of the cardiac cycle occurs when the atria contract?✔✔ Atrial systole
What sound is caused by the closing of the atrioventricular valves?✔✔ "Lub"
What sound is caused by the closing of the semilunar valves?✔✔ "Dub"
What tool is used to measure blood pressure?✔✔ Sphygmomanometer
What is the top number in a blood pressure reading called?✔✔ Systolic pressure 3 / 4
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What is the bottom number in a blood pressure reading called?✔✔ Diastolic pressure
What is the average normal blood pressure for a healthy adult?✔✔ 120/80 mmHg
What unit is used to express blood pressure?✔✔ Millimeters of mercury
What is the name of the pressure sensors in the walls of blood vessels?✔✔ Baroreceptors
What organ is primarily responsible for regulating blood volume and pressure?✔✔ Kidney
What hormone increases heart rate and blood pressure during stress?✔✔ Epinephrine
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