Lecture test 2

arteries that provide the major supply of the cerebral hemispheres are the internal carotid A

true or false
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Terms in this set (50)
arteries that provide the major supply of the cerebral hemispheres are the internal carotid A

true or false
True
End-diastolic volume (EDV) is the only regulator of stroke volume

true or false
false
hypotension is generally considered to be a systolic blood pressure above 100 mm Hg

true or false
false
which structures do close permanently shortly after birth? 1.ductus venosus 2.ductus arteriosus 3.foramen ovale 4.atrioventricular valves

-1,2,3
-2,4
-1,3
-4
-all correct
1,2,3

ductus venosus
ductus arteriosus
foramen ovale
the aortic semilunar valve opens when pressure in the aorta is lower then the ventricular pressure

true or false
true
the blood pressure is the same in both ventricles

true or false
false
the right atria receives all blood returning to the heart from the lungs

true or false
false
in and ECG, the T wave...

-sets the heart rate
-represents depolarization of the atria
-represents depolarization of the ventricles
-represents repolarization of the atria
-represents repolarization of the ventricles
represents repolarization of the ventricles
postural hypotension involves...

-blockage of an artery by plaque
-a sudden loss of a large amount of blood
-arterial pressure greater than 140/90
-gravity causing blood to collect below the heart
-an occlusion or rupture of a brain blood vessel
Gravity causing blood to collect below the heart
amount of renin released when blood pressure is 1.low 2.high

-1<2
-1>2
-1=2
1>2
as soon as the interventricular pressure exceedes that in the aorta, the... -AV valves closes -semilunar valves close -atria pumps blood into the ventricle -ventricle pumps blood into the aorta -ventricle is in diastoleventricle pumps blood into the aortaCardiac output is equal to -the volume of blood pumped by either ventricle during one second -the stroke volume times the number of beats per hour -the volume of blood in the body times the number of BPM -the stroke volume times the BPM -the volume of blood in the body divided by the stroke volumethe stroke volume times the BPMfrom superficial to deep, the following heart/pericardial tissues are -endocardium, myocardiym, epicardium, parietal pericardium -parietal pericardium, epicardium, endocardium, myocardium -parietal pericardium, epicardium, myocardium, endocardium -epicardium, parietal pericardium, endocardium, myocardiumParietal pericardium, epicardium, myocardium, endocardiumin a person with an aortic aneurysm, the probability of a rupture if the vessel is 1.arteriosclerotic 2.normal -1<2 -1>2 -1=21>2increases in which of the following directly raises arterial blood pressure? 1.cardiac output 2.blood volume 3.peripheral resistance 4.venous pressure -1,2,3 -2,4 -1,3 -only 4 -all correct1,2,3 cardiac output blood volume peripheral resistancepermitting the exchange of nutrients and gases between the blood and tissue cells is the primary function of -capillaries -arteries -veins -arterioles -none of the abovecapillariesplease compare 1.oxygen concentration in pulmonary arteries 2.oxygen concentration in pulmonary veins -1<2 -1>2 -1=21<2which of the following does not influence heart rate? -body color -age -gender -body temp -emotional statebody colorpressure fluctuates the most in the -aorta -arteries -arterioles -capillaries -veinsaortastroke volume ____ during a heart failure -increases -decreases -remains the samedecreasesthe amount of blood pumped from the 1.right ventricle per beat 2.left ventricle per beat -1<2 -1>2 -1=21=2the fetal opening between the atria is called the -foramen ovale -ductus arteriosus -ductus venosus -foramen magnum -septal diversionforamen ovalethe greatest blood pressure is experienced in the -right atrium -right ventricle -left atrium -left ventricle -brainleft ventriclethe left ventricular wall of the heart is thicker than the right wall in order to -accomodate a greater volume of blood -expand the thoracic cavity -pump with greater pressure -pump through a smaller valve -pump more blood since the left side feeds the entire body except the lungspump with greater pressurethe papillary muscles are attached to the -tongue -chordae tendinae -atrial walls of the heart -semilumar valveschordae tendinaethe pericardium, or pericardial sac -is a double layered, closed structure -anchors the heart in the mediastinum -has a tough fibrous connective tissue outter layer -has an innermost layer of squamous epithelial cells -all correctall correctthe portion of the ECG that indicated ventricular repolarization is the -P wave -QRS complex -R spike -T wave -P-Q intervalT wavethe SA node of the heart acts as a pacemaker beacause it -generates more frequent action potentials than other parts of the heart -generates less frequent action potentials than other parts of the heart -lies between the AV node and the purkinje fibers -acts directly on all heart chambers -acts on the left side of the heartgenerates more frequent action potentials than other parts of the heartthe thickness of the wall of the 1.right atrium 2.left atrium -1<2 -1>2 -1=21=2which of the following statements about the coronary arteries is true? -the left coronary artery supplies the anterior wall of the heart and most of the left ventricle -the right coronary artery supplies most of the right ventricle -the circumflex artery splits off from the left coronary artery -a heart attack occurs if a coronary artery is blocked -all correctall correctwhich of the following veins does not send blood directly to the right atrium? -superior vena cava -inferior vena cava -external jugular -coronary sinusexternal jugularwhich of these regulatory mechanisms would occur in response to a sudden increase in blood pressure? -a decrease in vasomotor tone -vasodialation of blood vessels -decrease in peripheral resistance -parasympathetic stimulation of the heart -all correctall correctwhich pressures move substance out of capillaries? 1.blood osmotic pressure 2.blood hydrostatic pressure 3.interstitial hydrostatic pressure 4.interstitial osmotic pressure -1,2,3 -2,4 -1,3 -only 4 -all correct2,4 blood hydrostatic pressure intersitital osmotic pressurecoronary arteries may become blocked -by a thrombus -by atherosclerotic lesions -and produce angina pectoris -and cause a myocardial infarct -all correctall correctelasticity of 1.an infants arteries 2.an elderly persons arteries -1<2 -1>2 -1=21>2heart rate during 1.fever 2.hyopthermia -1<2 -1>2 -1=21>2the myocardium receives its blood supply directly from the coronary sinus true or falsefalsethe visceral layer of the pericardium is also known as theepicardiumthe left ventricular wall of the heart is thicker than the right wall in order topump with greater pressurea faulty aortic semilunar valve would result in less blood reaching thesystemic circuitwhich of the following statements concerning pathway of blood flow is not correctfrom the pulmonary veins to the right atriumcutting the vagus nerve to the heart would...cause the heartrate to increasethe wave of depolarization that precedes the contraction of the atria is represented in the ECG by the ....P wavewhen the second heart sound is heard, this indicates which phase of the cardiac cycle is just now beginning?isovolumetric relaxationthe 3 major arteries of the upper limb form a continuum (i.e one that leads to another without branching) are thesubclavian, axillary, and brachialas the popliteal vein ascends the leg, it becomes thefemoral veinangiontenin II....stimulates the adrenal cortex to release aldosterone causes vasoconstrictionblood pressure is lowest in....veinstype O blood has....both A and B antibodies in the plasmaif arterial pressure increases then the following will occur to compensatethe total peripheral resistance will decrease