Exam 9: Cardiac Physiology

The only arteries in an adult that contain deoxygenated blood are the ________ arteries.

Use this figure to answer the corresponding questions. -Identify the location(s) where slow calcium channels are open. a.1 only b.1 and 2 c.3 only d.3 and 4 e.These cells do not have slow calcium channels.

High blood pressure decreases the afterload and increases the preload.

The fastest rate of autorhythmicity is normally carried out by the

Match heart characteristic with correct anatomical structure. a.tricuspid valve b.myocardium c.aortic semilunar valve d.AV node e.sinoatrial node -Its closing partially creates the heart sound "lub"

Use the following answer code to compare the magnitude of the items in question. a.A is greater than b.b.B is greater than a.c.A and B are equal or nearly equal. -a.Volume of blood in the left ventricle when the left AV valve opens B.Volume of blood in the left ventricle when the left AV valve closes

Use this figure to answer the corresponding questions. -Identify the location(s) where "ordinary" voltage-gated potassium channels are open. a.1 only b.only between 2 and 3 c.only between 3 and 4 d.2, 3, 4 e.5 only

An increase in afterload ____________________ the length of time available for ventricular ejection.

Which valve(s) prevent(s) regurgitation of blood from a ventricle to an atrium?

Match EKG feature with the correct characteristic. a.P wave b.QRS complex c.T wave d.PR interval e.TP interval f.ST segment -EKG deflection seen immediately before the semilunar valves close

The term systole means

Ventricular systole is displayed as the QRS on the ECG, and ventricular diastole is displayed as the T wave.

The cardiac muscle

Indicate which valve abnormality is being described using the answer code below. a.valvular stenosis b.valvular insufficiency -Valve does not open completely

Use the following answer code to compare the magnitude of the items in question. a.A is greater than b.b.B is greater than a.c.A and B are equal or nearly equal. -a.Coronary blood flow during systole B.Coronary blood flow during diastole

Use the answer code below to complete the following statements. a.stroke volume b.end-diastolic volume c.cardiac output d.heart rate e.end-systolic volume f.sympathetic activity g.stroke volume and heart rate h.end-diastolic volume and end-systolic volume i.end-diastolic volume and sympathetic activity -The minimum volume of blood that the ventricle contains after emptying is complete is the _____.

The SA node is the heart's normal pacemaker because

The heart utilizes glucose almost exclusively for energy production.

Indicate which ion is involved in each event being described by using the following answer code. a.K+ b.Na+ c.Ca₂₊ -Inactivation of _____ channels brings about the slow drift of membrane potential to threshold in the cardiac autorhythmic cells.

Use the following answer code to compare the magnitude of the items in question. a.A is greater than b.b.B is greater than a.c.A and B are equal or nearly equal. -a.Rate of ventricular filling in early diastole B.Rate of ventricular filling in late diastole