Chapter 19: Heart- Self Quiz

Steven's cardiac output at rest is 5 L/min. When he is exercising strenuously it is 20 L/min. What is Steven's cardiac reserve? 4 L/min 15 L/min 25 L/min 100 L/min

15 L/min

A resting heart rate of 40 beats/min indicates the person has Tachycardia Bradycardia Normal heart rate abnormal heart valves

Bradycardia

The plateau phase of the cardiac contractile cell action potential is caused by Ca inflow Cl inflow K outflow Na outflow

Ca inflow

The first heart sound (lubb) is due to Closing of Atrioventricular valve Closing of semilunar valve Opening of Atrioventricular valve Opening of semilunar valve

Closing of Atrioventricular valve

Fossa ovalis is a small shallow depression in the Parietal pericardium Interventricular septum Interatrial septum Atrioventricular septum

Interatrial septum

In which choice are the components of the cardiac conduction system listed in the correct order in which they conduct the cardiac impulse? SA node, AV bundle, AV node, Purkinje fibers SA node, AV node, AV bundle, Purkinje fibers AV node, AV bundle, SA node, Purkinje fibers AV node, SA node, Purkinje fibers, AV bundle

SA node, AV node, AV bundle, Purkinje fibers

Contraction of a ventricular chamber is called Diastole Diastasis hypertrophy Systole

Systole

An auricle is a valve located in a blood vessel an extension of the atrial wall part of a heart valve a blood vessel that carries blood away from the hear

an extension of the atrial wall

Blood leaving the left ventricle goes through which of the following valves? bicuspid tricuspid pulmonary semilunar valve aortic semilunar valve

aortic semilunar valve

The coronary sulcus is a groove on the outside of the heart that marks the boundary between the left and right atria left and right ventricles atria and ventricles aorta and the pulmonary trunk

atria and ventricles

Conduction of the cardiac impulse is slowed as it passes through the AV node. This allows time for the ventricles to start contracting before the atria finish contracting atria to contract completely before the ventricles start to contract SA node to catch up last ventricular contraction to finish

atria to contract completely before the ventricles start to contract

The alternate contraction and relaxation of the atria and ventricles are referred to as the cardiac output coronary circulation cardiac conduction system cardiac cycle

cardiac cycle

Stroke volume times heart rate equals blood pressure afterload end systolic volume cardiac output

cardiac output

All cardiac veins empty into the ____, which then empties into the ____. coronary sinus; left atrium coronary sinus; right atrium great cardiac vein; right atrium great cardiac vein; superior vena cava

coronary sinus; right atrium

In response to increased activity, the heart would be called upon to ___ the amount of blood pumped, and this would be caused by signals from ____ fibers. increase; sympathetic increase; parasympathetic decrease; sympathetic decrease; parasympathetic

increase; sympathetic

Damage to which of the following parts of the brain would cause the body to have less control over cardiac activity? cerebral cortex thalamus basal nuclei medulla oblongata

medulla oblongata

The heart valves contract to pump blood through the heart separate the left and right sides of the heart cause the heart sounds when they contract prevent blood from flowing backwards through the heart

prevent blood from flowing backwards through the heart

The right side of the heart acts as a pump for the pulmonary circulation systemic circulation coronary circulation hepatic portal circulation

pulmonary circulation

Pressure in the ventricles would be highest during atrial diastole atrial systole ventricular diastole ventricular systole

ventricular systole

The pericardial cavity is between the fibrous pericardium and parietal pericardium left atrium and left ventricle visceral pericardium and parietal pericardium endocardium and myocardium

visceral pericardium and parietal pericardium