CHAPTER 13: THE HEART
B. pulmonary trunk
Blood leaving the right ventricle enters the A. pulmonary veins B. pulmonary trunk C. superior vena cava D. inferior vena cava E. aorta
A. Left atrium
Blood returning from the lungs enters the A. Left atrium B. Left ventricle C. Right atrium D. Right ventricle E. Aorta
C. right atrium
Blood returning from the systemic circulation first enters the A. left atrium B. left ventricle C. right atrium D. right ventricle E. coronary artery
True
Capillaries connect the smallest arterioles to the smallest venules.
True
Capillary blood pressure favors filtration whereas colloid osmotic pressure favors reabsorption.
A. P wave
Depolarization of the atria represents on an electrocardiogram as the A. P wave B. Q wave C. S wave D. T wave E. QRS complex
E. the atrioventricular valves are closed
During ventricular systole A. the pressure in the ventricles decreases B. the ventricles are relaxed C. the atria are contracting D. blood is entering the ventricle E. the atrioventricular valves are closed
False
Histamine causes vasoconstriction of the arterioles near the capillaries to decrease capillary permeability.
B. 75
How many times does the average heart beat per minute? A. 50 B. 75 C. 100 D. 110 E. 140
left
Pulmonary veins return to the _____________ atrium.
A. ventricular systole
The QRS complex represents A. ventricular systole B. ventricular diastole C. atrial diastole D. atrial systole E. atrial kick
B. ventricular repolarization
The T wave on an electrocardiogram represents A. ventricular depolarization B. ventricular re polarization C. ventricular contraction D. atrial depolarization E. atrial repolarization
B. tricuspid valve
The atrioventricular valve that is located between the right atrium and ventricle is also called the A. mitral valve B. tricuspid valve C. bicuspid valve D. aortic semilunar valve E. pulmonary semilunar valve
B. between the left atrium and left ventricle
The bicuspid or mitral valve is located A. between the right atrium and right ventricle B. between the left atrium and left ventricle C. where the vena cavae join the right atrium D. the opening of the pulmonary trunk E. in the opening of the aorta
mitral
The bicuspid valve is also called the __________ valve.
systole
The contraction phase of the cardiac cycle is called ________.
right
The coronary sinus enters the _________ atrium.
D. the atrioventricular valves close
The first heart sound is heard when A. the semilunar valves close B. the atria contract C. the atrioventricular valves open D. the atrioventricular valves close E. blood enters the lungs
False
The first two aortic branches are called the right and left common carotid arteries.
base
The great vessels of the heart are located at the __________ of the heart.
perocardio
The heart is surrounded by the _________ perocardio cavity.
perocardial
The heart is surrounded by the __________ cavity.
portal system
The hepatic portal vein pathway is called the hepatic __________ ___________.
C. lungs
The left and right pulmonary arteries carry blood to the A. brain B. heart C. lungs D. liver E. spleen
A. heart
The left and right pulmonary veins carry blood to the A. heart B. liver C. brain D. lungs E. spleen
C. systemic circuit
The left ventricle pumps blood to the A. right atrium B. right ventricle C. systemic circuit D. lungs E. left atrium
C. left atrium
The left ventricle receives blood from the A. right atrium B. right ventricle C. left atrium D. inferior vena cava E. pulmonary trunk
endocardium
The most inner layer of the heart is the ____________.
myocardium
The muscle layer of the heart is the __________.
A. right atrium
The pacemaker of the heart is located in the A. right atrium B. right ventricle C. left atrium D. left ventricle E. arch of the aorta
True
The pericardium is a serous membrane that surrounds the heart.
cardiac cycle
The period between the start of one heartbeat and the beginning of the next is called __________ ___________.
True
The pulmonary and aortic valves have "half-moon" shapes and are referred to as "semilunar valves".
C. pulmonary trunk
The pulmonary semilunar valve guards the entrance to the A. right ventricle B. left ventricle C. pulmonary trunk D. pulmonary veins E. aorta
deoxygenated
The pulmonary trunk carries ___________ blood.
diastole
The relaxation phase of the cardiac cycle is called __________.
E. superior vena cava
The right atrium receives blood from the A. pulmonary arteries B. pulmonary veins C. pulmonary trunk D. arteries and veins E. superior vena cava
False
The right atrium receives high-oxygen blood through the pulmonary veins.
D. lungs
The right ventricle pumps blood to the A. left atrium B. left ventricle C. systematic circuit D. lungs E. brian
False
The right ventricle's muscular wall is thicker than that of the left.
leg, thigh
The saphenous vein is located in the _________ and __________.
left
The thickest part of the heart wall is located in the __________ ventricle.
False
The tricuspid valve lies between the left atrium and ventricle.
D. Epicardium
The visceral pericardium is also called the A. Endocardium B. Myocardium C. Mediastinium D. Epicardium
False
The volume of blood discharged from the ventricle with each contraction in adults is called cardiac output.
septum
The wall that is located between ventricles is know as the _____.
Arteries
__________ are blood vessels that usually carry blood away from the heart.
veins
___________ are blood vessels that usually return blood to the heart.
