Heart Anatomy and Physiology Quiz

<p>Monitoring blood glucose levels (C)</p> Signup and view all the answers

<p>To carry parasympathetic fibers to the cardiac plexus (A)</p> Signup and view all the answers

<p>Potassium (K+) exit from the cell (B)</p> Signup and view all the answers

<p>Slow influx of calcium ions (Ca2+) (D)</p> Signup and view all the answers

<p>75 msec (D)</p> Signup and view all the answers

<p>When the potassium channels close (B)</p> Signup and view all the answers

<p>It provides roughly 20% of the calcium required for contraction (A)</p> Signup and view all the answers

<p>To supply blood to the heart muscle itself (C)</p> Signup and view all the answers

<p>Digestive circuit (C)</p> Signup and view all the answers

<p>Three (A)</p> Signup and view all the answers

<p>The heart is positioned between the ribs (A)</p> Signup and view all the answers

<p>To facilitate gas exchange in the lungs (A)</p> Signup and view all the answers

<p>They are both closed. (D)</p> Signup and view all the answers

<p>Aortic sinuses (C)</p> Signup and view all the answers

<p>They tense to maintain valve closure. (A)</p> Signup and view all the answers

<p>Circumflex artery (A)</p> Signup and view all the answers

<p>Elevated blood pressure and elastic rebound of aorta (C)</p> Signup and view all the answers

<p>Interconnect anterior and posterior interventricular arteries. (D)</p> Signup and view all the answers

<p>Great cardiac vein (B)</p> Signup and view all the answers

<p>Anterior cardiac veins (B)</p> Signup and view all the answers

<p>Arterial anastomoses (B)</p> Signup and view all the answers

<p>Right coronary artery (A)</p> Signup and view all the answers

<p>Mitral valve (B)</p> Signup and view all the answers

<p>It has thicker walls. (C)</p> Signup and view all the answers

<p>Right ventricle (C)</p> Signup and view all the answers

<p>Brachiocephalic trunk (D)</p> Signup and view all the answers

<p>Saclike expansions at the base of the ascending aorta (C)</p> Signup and view all the answers

<p>It leads into the pulmonary trunk. (C)</p> Signup and view all the answers

<p>The left ventricle develops higher pressure. (B)</p> Signup and view all the answers

<p>Mitral valve (A)</p> Signup and view all the answers

<p>Through the aortic valve into the ascending aorta (D)</p> Signup and view all the answers

<p>It does not require additional support for conduction. (C)</p> Signup and view all the answers

<p>Myocardium (A)</p> Signup and view all the answers

<p>Tricuspid valve (C)</p> Signup and view all the answers

<p>Inferior vena cava (A)</p> Signup and view all the answers

<p>Prevent backflow of blood (B)</p> Signup and view all the answers

<p>Fossa ovalis (B)</p> Signup and view all the answers

<p>Pulmonary veins (B)</p> Signup and view all the answers

<p>Cardiac muscle (D)</p> Signup and view all the answers

<p>Maintain valve function (B)</p> Signup and view all the answers

<p>Foramen ovale (A)</p> Signup and view all the answers

<p>Interventricular septum (D)</p> Signup and view all the answers

<p>Aortic valve (D)</p> Signup and view all the answers

<p>Composed of simple squamous epithelium (B)</p> Signup and view all the answers

<p>Brachiocephalic trunk (A)</p> Signup and view all the answers

<p>To the heart muscle (C)</p> Signup and view all the answers

The process where K+ ions flow out of the cell through slow potassium channels.

Initial phase of action potential; Na+ ions rapidly enter the cell causing a positive shift.

Phase during action potential when Ca2+ ions enter the cell, prolonging depolarization.

Time after an action potential when a new action potential cannot be initiated.

Extracellular Ca2+ during the plateau phase provides 20% of Ca2+ needed for cardiac muscle contraction.

The amount of blood ejected from each ventricle per heartbeat, calculated as EDV - ESV.

The volume of blood in the ventricles at the end of diastole, just before contraction.

The volume of blood remaining in the ventricles at the end of systole, after contraction.

The percentage of EDV that is ejected during each contraction, an indicator of heart efficiency.

Reflexes that adjust heart activity based on blood pressure and chemical levels in blood.

The broader top part of the heart where major blood vessels emerge.

The pointed tip of the heart facing downward and to the left.

The heart’s own blood supply system, part of systemic circulation.

The path of blood between the heart and lungs for oxygenation.

The pathway that supplies blood to the entire body except the lungs.

The section at the superior end of the right ventricle, ending at the pulmonary valve.

A vessel that begins the pulmonary circuit by dividing into left and right pulmonary arteries.

Chamber that receives blood from the pulmonary veins.

Valve between left atrium and left ventricle, also known as the bicuspid valve.

Chamber that pumps oxygenated blood through the aortic valve into the ascending aorta.

The curve of the aorta that distributes blood to the upper body.

Chamber with thinner walls that pumps deoxygenated blood to the lungs.

Saclike expansions at the base of the ascending aorta.

The part of the aorta that rises from the left ventricle and curves into the aortic arch.

The wall separating the left and right ventricles.

The curved portion of the aorta that gives rise to major arteries.

Artery carrying deoxygenated blood from the heart to the left lung.

Chamber that receives deoxygenated blood from the body via the vena cavae.

Muscular partition separating the right and left atria of the heart.

Valve between the right atrium and right ventricle, preventing backflow.

Valves that prevent backflow of blood from ventricles to atria.

Muscular ridges located in the anterior wall of the atria.

Vein that collects deoxygenated blood from the heart muscle.

Fetal heart opening between the atria that closes at birth.

Valves that prevent backflow into the ventricles from arteries.

Fibrous cords that connect av valves to papillary muscles.

Inner layer of the heart wall, consisting of simple squamous epithelium.

Middle layer of the heart wall made up of cardiac muscle tissue.

Large vein carrying deoxygenated blood from the lower body to the heart.

The largest artery in the body, carrying oxygenated blood from the heart.

Muscles that contract to tighten the chordae tendineae, stabilizing the valves.

Blood flow to and from the tissues of the heart muscle.

Supplies blood to the right atrium and parts of the ventricles.

Supplies blood to the left atrium and left ventricle.

Drains blood from the anterior part of the heart and returns it to the coronary sinus.

Branches from the left coronary artery supplying the front part of the heart's ventricles.

Connections between arteries to ensure constant blood supply to the heart.