Heart CC & MAP
A clicking, whooshing, or roaring sound with a heart beat is called a _____. A: murmur B: MI C: regular heartbeat
A
Because the human heart is myogenic A: it will beat even if all nerves to it are severed. B: both ventricles pump the same amount of blood. C: it is not subject to the influence of hormones. D: it contracts rhythmically. E: it generates electrical activity that can be detected by an electrocardiograph
A
Because the human heart is myogenic A: it will beat even if all nerves to it are severed. B: both ventricles pump the same amount of blood. C: it is not subject to the influence of hormones. D: it contracts rhythmically. E: it generates electrical activity that can be detected by an electrocardiograph.
A
Blood normally leaves the right ventricle through A: pulmonary semilunar valve B: pulmonary tricuspid valve C: tricuspid valve D: bicuspid valve E: aortic semilunar valve
A
Blood normally leaves the right ventricle through A: the pulmonary semilunar valve. B: the pulmonary tricuspid valve. C: the tricuspid valve. D: the bicuspid valve. E: the aortic semilunar valve.
A
Contraction of any heart chamber is called ___. A: systole B: asystole
A
Depolarization of the atria corresponds to the ECG's A: P wave. B: QRS complex. C: QT interval. D: T wave. E: S-T segment
A
Describe the pressures in the atria and ventricles that would cause the opening of the AV valves A: pressure in the atria would be greater than the pressure in the ventricles B: pressures in the atria and ventricles would be equal C: pressure in the ventricles would be greater in the atria
A
During isovolumetric contraction, the pressure in the ventricles A: rises rapidly B: falls rapidly C: remains constant D: rises very slowly
A
Each of the following will lead to a decrease in blood pressure, except A: release of renin. B: decrease in blood volume. C: decreased peripheral resistance. D: increased levels of ANP (atrial natriuretic peptide). E: reduced thirst.
A
In a single cardiac contraction, or heartbeat, the entire heart contracts in series--first the atria and then the ventricles. What is the first step in this process? A: an action potential is generated by the sinoatrial node B: an action potential is generated at the Purkinje fibers C: an action potential is generated by the atrioventricular node D: an action potential is generated at the bundle of His
A
In mitral stenosis, one of the most common forms of valvular heart disease, when the ventricles contract blood will leak back into the A: left atrium. B: right atrium. C: aorta. D: pulmonary trunk. E: pulmonary arteries.
A
Jim suffers from bradycardia. Which type of drug might be a candidate to treat his condition? A: glucagon B: calcium channel blockers C: beta-adrenergic antagonists D: digitalis
A
Partial obstruction of coronary blood flow can cause chest pain caused by ischemia, this condition is known as ___ ___ A: angina pectoris B: high blood pressure C: low blood pressure D: coronary artery disease
A
Partial obstruction of coronary blood flow can cause chest pain caused by ischemia, this condition is known as ___ ___. A: angina pectoris B: tachycardia C: bradycardia
A
Points where arteries combine blood flow providing alternate routes for maintaining blood supply is known as A: anastomosis B: valves C: arteries D: veins
A
The ________ is the volume of blood in a ventricle at the beginning of systole A: end diastolic volume B: end systolic volume C: beginning diastolic volume D: beginning systolic volume
A
The ________ ventricle has a greater workload than the ________ A: left; right ventricle B: right; left ventricle C: right; systemic circulation D: all of these E: none of these
A
The ________ ventricle has a greater workload than the ________. A: left; right ventricle B: right; left ventricle C: right; systemic circulation D: all of these E: none of these
A
The heart is a muscle. The left side typically _____ when overworked. A: enlarges B: shrinks C: stays the same
A
The heart is actually _______ pumps? A: 2 B: 3 C:1
A
The heart pumps approximately ________ milliliters of blood each minute. A: 6,000 B: 15,000 C: 20,000 D: 50,000 E: 100,000
A
The process of decrease in vessel diameter that occurs due to smooth muscle contraction is called ________. A: vasoconstriction B: constriction
A
The pulmonary veins carry blood to the A: heart B: lungs C: brain D: intestines E: liver
A
The pulmonary veins carry blood to the A: heart. B: lungs. C: brain. D: intestines. E: liver.
A
Ventricular repolarization occurs during the ___ ___ of an ECG. A: T wave B: QRS wave C: P wave
A
What happens during atrial systole? A: the chambers contract and push blood into the ventricles B: the chamber is relaxed ad fills with blood C: an impulse travels through the Bundle of His and Purkinje fibers, causing contraction D: the right and left atrioventricular valves are closed
A
When the ventricles contract, the papillary muscles also contract, which A: tightens the chordae tendinae preventing the AV valves from prolapsing B: tightens the chordae tendinae, causing the AV valves to close C: loosens the chordae tendinae, allowing the semilunar valves to open D: loosens the chordae tendinae, allowing the semilunar valves to close
A
Which chamber pumps oxygenated blood out the aorta to the systemic circuit? A: left ventricle B: right atrium C: right ventricle D: left atrium
A
Which heart chamber pumps unoxygenated blood out the pulmonary trunk? A: right ventricle B: left ventricle C: left atrium D: right atrium
A
A persistent, resting heart rate in excess of 100 beats/minute is called ___. A: bradycardia B: tachycardia C: normal heart rate
B
An individual is feeling severe chest pain, which radiates to the neck, jaw, shoulder, and left arm. The individual is showing symptoms of A: tachycardia. B: myocardial infarction. C: congestive heart failure. D: valvular heart disease. E: bradycardia.
B
Dr. Jim knew this victim was suffering from cardiac tamponade due to blood in the pericardial space. The blood in the pericardial cavity compressed the heart, squeezing the atria and ventricles so the atria could not fill. What vessels fill the right atria? A: pulmonary arteries B: superior and inferior vena cava C: pulmonary veins D: aorta
B
Homeostatic mechanisms in response to blood loss include all of the following, except A: uptake of interstitial fluid due to reduced capillary pressure. B: inhibition of EPO secretion. C: activation of ADH secretion. D: activation of aldosterone secretion. E: increased thirst and water intake.
B
If the chordae tendineae of an animal's heart were cut, the most likely effect would be: A: valvular stenosis B: valvular prolapse C: fibrillation D: heart block E: myocardial infarction
B
In comparing a trained athlete to a non-athlete, which of these comparisons is false? A: the athlete has a lower resting heart rate. B: both hearts weigh about the same. C: the athlete has a higher resting stroke volume. D: the athlete has a higher exercise stroke volume. E: the athlete has a higher exercise cardiac output.
B
Isovolumetric relaxation and ventricular filling (two phases of the cardiac cycle) take place during? A: ventricular systole B: ventricular diastole
B
Listening to the sounds made by the body, as with a stethoscope is called ___ A: respiratory rate B: auscultation C: blood pressure D: oxygen rate
B
Points where arteries combine blood flow providing alternate routes for maintaining blood supply is known as ___. A: anuerysm B: anastomosis C: embolism
B
Put the phases of the cardiac cycle in the correct order, starting after ventricular filling A: isovolumetric relaxation, ventricular ejection, isovolumetric contraction B: isovolumetric contraction, ventricular ejection, isovolumetric relaxation C: ventricular ejection, ventricular relaxation, isovolumetric contraction D: ventricular ejection, isovolumetric contraction, isovolumetric relaxation
B
The heart is enclosed in a double-walled sac called the A: epicardium B: pericardium C: myocardium D: there isn't one
B
The heart is enclosed in a double-walled sac called the ___. A: epicardium B: pericardium C: medicardium
B
The normal pacemaker of the heart is located in the A: Purkinje fibers. B: sinoatrial node. C: atrioventricular node. D: wall of the left ventricle. E: both the left and right ventricles.
B
The ventricles are said to exhibit ___ when they beat in a rapid, uncoordinated fashion and do not effectively eject blood. A: defibrillation B: fibrillation
B
Ventricular repolarization occurs during the ___ ___ of an ECG. A: Q-T Interval B: T wave C: P wave D: QRS complex
B
When will the blood pressure be greater? A: when the peripheral vessels dilate B: when the peripheral vessels constrict
B
Which of the following is correct about the filling of the ventricles? A: the majority of ventricular filling is caused by contraction of the atria B: most blood flows passively into the ventricles through open AV valves
B
Which of the following would have the greater effect on vascular resistance? A: doubling the length of a blood vessel B: decreasing the diameter of a blood vessel by ½ C: Neither would be greater.
B
ADH and aldosterone secretion are part of the body's long-term compensation for A: a heart attack. B: hypertension. C: a serious hemorrhage. D: prolonged exercise. E: a heavy meal.
C
As a result of the long refractory period in the cardiac action potential, cardiac muscle cannot exhibit A: tonus. B: treppe. C: tetany. D: recruitment. E: fatigue.
C
At a heart rate of 60 beats/minute, a cardiac cycle lasts A: 60 seconds. B: 60 milliseconds. C: 1 second. D: 370 milliseconds. E: 630 milliseconds.
C
At a heart rate of 60 beats/minute, a cardiac cycle lasts A: 60 seconds. B: 60 milliseconds. C: 1 second. D: 370 milliseconds. E: 630 milliseconds.
C
At a heart rate of 60 beats/minute, a cardiac cycle lasts A: 60 seconds. B: 60 milliseconds. C: 1 second. D: 370 milliseconds. E: 630 milliseconds.
C
In the cardiovascular system, the _____ circuit carries blood to and from the lungs, which is served by the _____ side of the heart A: pulmonary; left B: systemic; left C: pulmonary; right D: systemic; right E: coronary; right
C
In the cardiovascular system, the _____ circuit carries blood to and from the lungs, which is served by the _____ side of the heart. A: pulmonary; left B: systemic; left C: pulmonary; right D: systemic; right E: coronary; right
C
Increased pressure in the ventricles would close what valve(s)? A: semilunar valves B: both semilunar and AV valves C: AV valves only
C
Pressure in the arteries that opposes the opening of the semilunar valves is called A: inotropic pressure B: oncotic pressure C: afterload D: preload
C
Pressure in the arteries that opposes the opening of the semilunar valves is called A: inotropic pressure B: oncotic pressure C: afterload D: preload
C
The P wave of the electrocardiogram is a signal from A: depolarization of the SA node. B: depolarization of the AV node. C: depolarization of the atria. D: repolarization of the atria. E: depolarization of the ventricle
C
The heart beats approximately ________ times each day. A: 1,000 B: 10,000 C: 100,000 D: 1,000,000 E: 10,000,000
C
Ventricular depolarization occurs during the ____ ____ of an ECG. A: P wave B: T wave C: QRS complex
C
Ventricular repolarization occurs during the ___ ___ of an ECG A: B wave B: P wave C: T wave
C
What causes the aortic semilunar valve to close? A: equal ventricular and aortic pressures B: higher ventricular pressure than aortic pressure C: greater pressure in the aorta than in the left ventricle
C
Which heart chamber receives blood from the pulmonary veins? A: right ventricle B: right atrium C: left atrium D: left ventricle
C
With the force of the head-on collision, the patient's chest collided with the steering wheel, causing fractures of the anterior chest wall, including the sternum and ribs. The heart itself, located just deep to the sternum, was injured and began bleeding into the pericardial cavity. What is normally found in the pericardial cavity? A: air B: synovial fluid C: pericardial fluid D: blood
C
Arteriosclerosis can lead to A: hypertension. B: stroke. C: coronary artery disease. D: all of these E: none of these
D
Arteriosclerosis can lead to A: hypertension. B: stroke. C: coronary artery disease. D: all of these E: none of these
D
Contractions of the papillary muscles A: close the atrioventricular valves. B: close the semilunar valves. C: eject blood from the ventricles. D: prevent the atrioventricular valves from reversing into the atria. E: eject blood from the atria into the ventricles.
D
Each of the following will cause an increase in blood pressure, except A: increased levels of aldosterone. B: increased levels of angiotensin II. C: increased blood volume. D: increased levels of ANP (atrial natriuretic peptide). E: increased levels of ADH (antidiuretic hormone)
D
Each of the following will cause an increase in blood pressure, except A: increased levels of aldosterone. B: increased levels of angiotensin II. C: increased blood volume. D: increased levels of ANP (atrial natriuretic peptide). E: increased levels of ADH (antidiuretic hormone).
D
How is heart rate controlled? A: dual innervation controls the heart rate B: heart rate is controlled through the cardiac plexus C: parasympathetic and sympathetic divisions of the ANS control heart rate D: all the listed answers are correct
D
In cardiac muscle A: calcium ions are not released from the sarcoplasmic reticulum. B: calcium ions do not bind to troponin molecules. C: calcium ions play no role in the process of contraction. D: calcium ions enter the cell through slow ion channels. E: calcium ions play an important role in repolarizing the membrane after the depolarization phase.
D
In which of the following would the blood flow be highest? A: a vessel 0.5 cm in diameter and 2 meters long B: a vessel 1.0 cm in diameter and 10 meters long C: a vessel 0.5 cm in diameter and 4 meters long D: a vessel 1.0 cm in diameter and 2 meters long
D
Increased levels of carbon dioxide in the blood will result in decreased A: heart rate B: cardiac output C: blood flow to the lungs D: parasympathetic stimulation of the heart E: none of these
D
Increased levels of carbon dioxide in the blood will result in decreased A: heart rate. B: cardiac output. C: blood flow to the lungs. D: parasympathetic stimulation of the heart. E: none of these
D
The following are structural components of the conducting system of the heart. 1. Purkinje fibers 2. AV bundle 3. AV node 4. SA node 5. bundle branches The sequence in which excitation would move through this system is A: 1, 4, 3, 2, 5. B: 3, 2, 4, 5, 1. C: 3, 5, 4, 2, 1. D: 4, 3, 2, 5, 1. E: 4, 2, 3, 5, 1.
D
The following are structural components of the conducting system of the heart. 1. Purkinje fibers 2. AV bundle 3. AV node 4. SA node 5. bundle branches The sequence in which excitation would move through this system is A: 1, 4, 3, 2, 5. B: 3, 2, 4, 5, 1. C: 3, 5, 4, 2, 1. D: 4, 3, 2, 5, 1. E: 4, 2, 3, 5, 1.
D
Turbulent blood flow occurs A: when there are irregularities in the vessel wall. B: at high flow rates. C: when there are sudden changes in vessel diameter. D: all of these E: none of these
D
Which chamber receives blood from the superior and inferior vena cavae? A: left atrium B: left ventricle C:right ventricle D: right atrium
D
Which of the following factors will increase the net filtration pressure to move fluid out of capillaries? A: decreased plasma albumen B: increased blood hydrostatic pressure C: decreased tissue hydrostatic pressure D: all of these E: none of these
D
________ is to contraction as ________ is to relaxation A: systole; diastole B: diastole; systole C: filling; relaxing D: ejection; filling E:Systole; diastole or Ejection; filling
E
________ is to contraction as ________ is to relaxation. A: Systole; diastole B: Diastole; systole C: Filling; relaxing D: Ejection; filling E: Systole; diastole or Ejection; filling
E
Listening to the sounds made by the body, as with a stethoscope is called ___.
ausculation
