Exam 9: Cardiac Physiology

Using the following answer code, indicate which pressure relationship exists during the time in question. a.aortic pressure > ventricular pressure > atrial pressure b.aortic pressure > ventricular pressure < atrial pressure c.aortic pressure < ventricular pressure > atrial pressure d.aortic pressure < ventricular pressure < atrial pressure -When the atrioventricular valve opens

Match cardiovascular feature with correct characteristic. a.angina pectoris b.embolus c.atherosclerosis d.thrombus -Abnormal clot attached to a vessel wall

The aortic valve opens

The mitral valve prevents regurgitation of blood back into the left atrium from the left ventricle.

The volume of blood ejected from each ventricle during a contraction is called the

Match heart characteristic with correct anatomical structure. a.tricuspid valve b.myocardium c.aortic semilunar valve d.AV node e.sinoatrial node -Is much thicker on the left side

Use this figure to answer the corresponding questions. -This graph shows the electrical activity for one of the heart's a.Purkinje fibers b.pacemaker cells c.contractile cells d.ventricular cells e.pacemaker and ventricular cells

Under normal conditions, all of the EDV is ejected before ventricular diastole begins.

An increase in afterload will cause the heart to remain longer in the period of isovolumetric contraction.

Using the following answer code, indicate which pressure relationship exists during the time in question. a.aortic pressure > ventricular pressure > atrial pressure b.aortic pressure > ventricular pressure < atrial pressure c.aortic pressure < ventricular pressure > atrial pressure d.aortic pressure < ventricular pressure < atrial pressure -During ventricular filling

The second half of the pacemaker potential is brought about through the opening of ____-type ____ channels.

Myocardial ____________________ is the insufficient circulation of oxygenated blood to cardiac muscle in order to maintain its aerobic metabolism.

The plateau of the cardiac action potential results from the opening of voltage-gated slow ____ channels in the plasma membrane of the ____ cell.

Match heart characteristic with correct anatomical structure. a.tricuspid valve b.myocardium c.aortic semilunar valve d.AV node e.sinoatrial node -Contains Purkinje fibers

Match the characteristic with the appropriate term(s). a.tricuspid valve b.bicuspid valve c.mitral valve d.pulmonary valve e.aortic valve f.all heart valves g.aortic valve; pulmonary valve h.bicuspid valve; mitral valve i.tricuspid valve; bicuspid valve j.tricuspid valve; pulmonary valve k.mitral valve; aortic valve l.fibrous skeleton m.chordae tendineae n.oxygenated blood o.deoxygenated blood -Prevents valves from opening into the atria

The heart muscle is completely repolarized and at rest during the _______ segment on the ECG.

Ventricular filling occurs more rapidly early in diastole than it does later in diastole.

Use this figure to answer the corresponding questions. -Identify the location(s) where fast calcium channels are open. a.1 and 2 b.1 and 3 c.2 and 3 d.3 and 4 e.4 only

List the following in the correct order of their occurrence within the ST segment on the ECG: ventricular ejection begins, lub sound, opening of semilunar valves, period of isovolumetric contraction, closing of AV valves, ventricular systole begins.

The pathway that permits electrical activity to pass from cell-to-cell in myocardial tissue is the