Anatomy & Physiology Ch. 12
a
a basketball player has a resting cardiac output of 5500 mL and a stroke volume of 100 mL. what is the pulse? a 55 bpm b 60 bpm c 65 bpm d 45 bpm
a
chemoreceptors that detect changes in blood oxygen levels are located in the a aortic and cartoid bodies b cartoid and basal bodies c basal and ventricular bodies d ventricular and aortic bodies
b
during strenuous exercise, cardiac output is 16,000 mL and stroke volume is 110 mL. What is the pulse? a 135 bpm b 145 bpm c 155 bpm d 105 bpm
a
exercise cardiac output is 9900 mL. What are the pulse and stroke volume? a 110 bpm and 90 mL b 100 bpm and 90 mL c 105 bpm and 90 mL d 112 bpm and 95 mL
d
for the heart muscle, the most important substance in the blood is a glucose b iron c protein d oxygen
b
if stroke volume is 70 mL and pulse is 74 bpm, what is cardiac output? a 5000 mL b 5180 mL c 5260 mL d 5280 mL
b
in the cardiac cycle, which statement is true of blood flow from the atria to the ventricles? a all blood flows passively b most blood flows passively c most blood is actively d all blood is actively pumped
d
in the cardiac cycle, which statement is true of blood flow from the ventricles to the arteries? a all blood flows passively b most blood flows passively c most blood is actively pumped d all blood is actively pumped
b
pressoreceptors that detect changes in blood pressure are located in the a frontal and cartoid sinuses b cartoid and aortic sinuses c aortic and ventricular sinuses d ventricular and frontal sinuses
a
the amount of blood pumped by a ventricle in one beat is called the a stroke volume b contraction volume c cardiac output d ventricular output
d
the amount of blood pumped by the left ventricle in one minute is called the a stroke volume b minute cardiac volume c ventricular output d cardiac output
b
the aorta takes blood from the a left ventricle to the lungs b left ventricle to the body c right ventricle to the lungs d right ventricle to the body
d
the aortic and pulmonary semilunar valves prevents backflow of blood from the a ventricles to the atria when the ventricles relax b arteries to the ventricles when the ventricles contract c ventricles to the atria when the ventricles contract d arteries to the ventricles when the ventricles relax
d
the aortic body contains a pressoreceptors that detect changes in blood pressure b chemoreceptors that detect changes in blood pressure c pressoreceptors that detect changes in blood oxygen level d chemoreceptors that detect changes in blood oxygen level
b
the aortic semilunar valve prevents back flow of blood from the _______ to the ________ a aorta/left atrium b aorta/left ventricle c aortic vein/right atrium d aortic vein/right ventricle
a
the cardiac conduction pathway consists of a specialized cardiac muscle cells within the heart b nerve cell pathways within the heart c both a & b d both a & b, and the skeleton of the heart
a
the cardiac inhibitory center uses these nerves a vagus b sympathetic c phrenic d all of these, depending on the situation
d
the cardiac reserve is the a ability of the heart to speed up when necessary b ability of the heart to pump more forcefully c difference between resting heart rate and maximum exercise heart rate d difference between resting cardiac output and maximum exercise cardiac output
b
the coronary arteries are branches of the ______ and supply _______ to the myocardium a pulmonary artery/nutrients b aorta/oxygen c superior vena cava/nutrients d inferior vena cava/oxygen
c
the coronary sinus is the union of the coronary ______ and returns blood to the _______ a veins/left atrium b arteries/right atrium c veins/right atrium d arteries/left atrium
a
the difference between resting cardiac output and maximum exercise cardiac output is the a cardiac reserve b cardiac extra c exercise increment d exercise adaption
c
the ejection fraction of the heart is the a percent of the body's total blood a ventricle pumps per beat b percent of the body's total blood a ventricle pumps per minute c percent of blood within a ventricle that is pumped during systole d percent of the blood within a ventricle that is pumped during diastole
c
the fibrous pericardium a forms a sac around the heart b is attached to the base of the great vessels c both A & B d both A and B, and is attached to the diaphragm superiorly
c
the fibrous skeleton of the heart a separates the atria and the ventricles b anchors the outer edges of the valves of the heart c both a & b d both a & b, and it is made of bone
b
the function of atrial natriuretic peptide ANP is to a decrease sodium and water excretion by the large intestine b increase sodium and water excretion by the kidneys c increase sodium and water excretion by the large intestine d decrease sodium and water excretion by the kidneys
b
the function of the chordae tendonae and papillary muscles is to a anchor the heart to the pericardial membranes b anchor the flaps of the AV valves c anchor the flaps of the semilunar valves d anchor the interior walls of the ventricles
b
the function of the serous fluid between the parietal pericardium & visceral pericardium is to a help pump blood b prevent friction c prevent abnormal blood clotting d prevent prolonged contraction
a
the heart is ______ to the lungs and ______ to the diaphragm a medial/superior b lateral/superior c medial/inferior d lateral/inferior
b
the heart rate in increased by a parasympathetic impulses b sympathetic impulses c somatic motor impulses d pressoreceptor impulses
a
the impulse for contraction of the heart passes from the atria to the ventricles at the a AV node to the bundle of His b SA node to the AV node c bundle of His to AV node d SA node to the bundle of His
a
the left ventricle pumps blood into the _____, to the _____ a aorta/body b pulmonary artery/body c aorta/lungs d pulmonary artery/lungs
d
the name for the lining of the chambers of the heart is a mesocardium b myocardium c epicardium d endocardium
b
the normal resting rate for a healthy adult is a 50-70 bpm b 60-80 bpm c 90-100 bpm d 80-110 bpm
d
the parts of the cardiac conduction pathway that bring about contraction of the ventricles are the a AV node, purkinje fibers, and bundle branches b bundle of His, SA node, and AV node c AV node, bundle branches, and SA node d bundle of His, bundel branches, and purkinje fibers
b
the pericardial membranes, in order beginning with the outermost, are the a visceral, fibrous, parietal b fibrous, parietal, visceral c parietal, visceral, fibrous d fibrous, visceral, parietal
c
the pulmonary artery takes blood from the a left ventricle to the lungs b left ventricle to the body c right ventricle to the lungs d right ventricle to the body
d
the pulmonary semilunar valve prevents backflow of blood from the _____ to the ______. a pulmonary veins/right atrium b pulmonary artery/left ventricle c pulmonary veins/left atrium d pulmonary artery/right ventricle
d
the pulmonary veins return blood from the ____ to the ______. a body/right atrium b lungs/right atrium c body/left atrium d lungs/left atrium
c
the right and left AV valves prevent backflow of blood from the a ventricles to the atria when the ventricles relax b arteries to the ventricles when the ventricles contract c ventricles to the atria when the ventricles contract d arteries to the ventricles when the ventricles relax
a
the superior and inferior caval veins return blood from the ______ to the ______ a body/right atrium b lungs/right atrium c body/left atrium d lungs/left atrium
c
the vagus nerves carry impulses a from the spinal cord to increase heart rate b from the spinal cord to decrease heart rate c from the medulla to decrease heart rate d from the medulla to increase heart rate
b
the ventricle with the thicker walls is the _____ ventricle, because it pumps blood to the ______. a right/lungs b left/body c right/body d left/lungs
c
to calculate cardiac output a add stroke volume and pulse b subtract stroke volume from pulse c multiply stroke volume times pulse d divide pulse by stroke volume
c
which of these does NOT happen following a sudden decrease in blood pressure to the brain? a cartoid pressoreceptors detect the drop in blood pressure b sensory impulses travel along the glossopharyngeal nerves to the medulla c inhibitory center of the medulla is activated d sympathetic impulses increase the heart rate
a
which sequence correctly describes blood flow? a right heart to lungs to left heart to body to right heart b left heart to right heart to body to lungs to left heart c left heart to lungs to right heart to body to left heart d right heart to left heart to lungs to body to right heart
d
which statement is NOT true of the atria of the heart? a they are the upper chambers and have thin walls b they produce the hormone ANP when blood pressure rises c the right atrium receives blood from the lower body d the left atrium receives blood from the upper body
b
which statement is NOT true of the cardiac conduction pathway a the bundle of his is involved in the contraction of the ventricles b the SA node is located in the wall of the right ventricle c the SA node initiates each heartbeat d the purkinje fibers are involved in the ventricular contractions
c
which statement is NOT true of the location of the heart? a the heart is within the mediastinum b the heart is medial to the lungs c the heart is inferior to the diaphragm d the heart is encircled and protected by the rib cage
c
which statement is NOT true of the pericardial membranes? a the visceral pericardium is also called the epicardium b serous fluid prevents friction as the heart beats c the parietal pericardium is lined by the fibrous pericardium d the fibrous pericardium is attached to the great vessels of the heart
d
which statement is NOT true of the regulation of heart rate? a the cardiac center are in the medulla b heart rate is increased by sympathetic impulses c heart rate is decreased by parasympathetic impulses d the vagus nerves to the heart are sympathetic nerves
d
which statement is NOT true of the sensory and motor nerves from and to the heart? a parasympathetic nerves innervate the SA node and AV node b the sensation of pain in the heart is caused by lack of oxygen c sympathetic nerves are accelerator nerves d vagus nerves are sympathetic nerves
a
which statement is NOT true of the valves of the heart? a the mitral valve prevents backflow of blood from the left atrium to the left ventricle b the aortic semilunar valve prevents backflow of blood to the left ventricle when the ventricle relaxes c the tricuspid valve prevents back flow of blood from the right ventricle to the right atrium d the pulmonary semilunar valve prevents backflow of blood from the pulmonary artery to the right ventricle
d
which statement is NOT true of the ventricles of the heart a the septum between them is made of myocardium b they are the lower chambers c the right ventricle pumps blood to the lungs d the left ventricle has thin walls because the blood it pumps is only going to the body
b
with respect to the heart, systole means ______ and diastole means ______ a faster heart rate/slower heart rate b contraction/relaxation c relaxation/contraction d slower heart rate/faster heart rate
a
within the chambers of the heart, clotting is prevented by the a smooth endocardium b smooth epicardium c smooth myocardium d smooth pericardium
