Test
A&P II, Chpt 19
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Preguntas del test (55)
1What carries blood to the lungs for gas exchange and returns blood to the heart?
- APulmonary trunk
- BPulmonary circuit
2Which side of the heart receives oxygen-poor blood?
- ARight side
- BBoth sides
3To where in the body does the systemic circuit supply blood?
- AThe organs
- BThe arteries
4What two major arteries return oxygen poor blood to the right side of the heart?
- APulmonary trunk and ciliac trunk
- BSuperior and inferior vena cava
5What cavity is the heart located in?
- AThoracic cavity
- BAbdominopelvic cavity
6What is located in the mediastinum, between the lungs and deep to the sternum?
- AThe heart
- BThe diaphragm
7What is the bottom of the heart called?
- AApex
- BAorta
8Also called the parietal pericardium, this is a fibrous layer of dense irregular CT and deep serous layer.
- APericardial sac
- Bpericarial infarction
9The epicardium (serous membrane on the external surface of the heart) is also called what?
- AEpicardial sac
- BVisceral pericardium
10What is the space between the parietal and visceral membranes called?
- APericardial cavity
- BPericarial sac
11What are the three layers of the heart wall?
- AEpicardium, endocardium and pericardium
- BEpicardium, endocardium and myocardium
12Folds in the plasma membrane that interlock cells are called what?
- AInterlocked discs
- BIntercalated folds
13What is the function of a mechanical junction?
- ATightly join cells and prevent them from pulling apart when they contract
- BTightly join cells and help them break apart when they contract
14Channels that allow ions to flow from the cytoplasm of one cell into the next are called what?
- AElectrical/gap junctions
- BElectric slide
15Cardiocytes are right in what three things?
- AMyoglobin, glycogen and mitochondria
- BMyoglobin, glycogen and ATP
16Collagen and elastic fibers that provide structural support, anchor cardiocytes and electrically insulate chambers are called the...
- AFibrous skeleton
- BFiber skeletal
17Which receives blood returning to the heart by way of the great veins?
- AAtria
- BVentricles
18What is an auricle?
- AEar-like extension, increases atrial volume
- BWall that separates the atria
19Which ejects blood into the arteries?
- AAtria
- BVentricles
20Groove that encircles the heart between the atria and ventricles and contains blood vessels...
- ACoronary AV sulcus
- BInterventricular sulci
21Anterior and posterior grooves that overlie the IV septum and contains blood vessels...
- AInterventricular sulci
- BInteratrial sulci
22Wall between the ventricles
- AInteratrial septum
- BInterventricular septum
23What is the purpose of valves?
- AEnsure the one-way flow of blood
- BThere is no purpose
24Which valves regulate the opening between the atria and the ventricles?
- AAtrioventricular AV valves
- BInterventricular IV valves
25The _____ connect valve cusps to papillary muscles, preventing flipping or bulging of the cusps
- ATendons
- BTendinous cords
26Semilunar SL valves...
- ARegulate the flow of blood from the ventricles to the large arteries
- BRegulate the flow of blood from the lower limbs back to the heart
27Which valve controls the opening from the right ventricle into the pulmonary trunk?
- APulmonary SL valve
- BPulmonary trunk
28Which valve controls the opening from the left ventricle into the aorta?
- AAortic SL valve
- BVentricular SL valve
29Failure of a valve to prevent backwards flow of blood?
- AValvular stenosis
- BValve insufficiency
30When the cusps are stiffened and the opening is constricted by scar tissue, this is called what?
- AValvular stenosis
- BValve insufficiency
31Regurgitation of blood through and insufficient valve
- AMurmur
- BMumble
32What is mitral valve prolapse?
- AWhen the mitral valve closes before it's expected to
- BWhen one or more left AV valve cusps bulge into the atrium during ventricular contraction
33What is the meaning of myogenic?
- ASignal originates within the heart
- BSignal targets the heart
34Initiates each heartbeat and determines the heart rate
- ASinoatrial SA node -- the pacemaker
- BAutorhythmic
35Receives signal from the SA node and directs it to the ventricles
- AAntroventricular AV node
- BAtrioventricular AV bundle
36Nervelike processes that arise from the ends of the bundle
- APerkins fibers
- BPurkinje fibers
37The _____ rhythm is the NORMAL heartbeat triggered by the SA node (70-80 bpm)
- ASinus
- BCoronary
38AV node takes over the heart rhythm is SA node is damaged, called the _____ rhythm
- ANodal
- BSinus
39In the SA node, a slow inflow of Sodium (Na) causes gradual depolarization. This is called...
- APacemaker physiology
- BPacemaker potential
40When the pacemaker potential reaches threshold, _____ channels open and _____ flows in, producing rapid depolarization
- ACalcium (Ca)
- BPotassium (K)
41At peak, _____ channels open and _____ leaves the cell, causing repolarization
- ACalcium (Ca)
- BPotassium (K)
42Once the potassium channels close, what happens to the pacemaker potential?
- ANothing
- BIt starts over
43An ECG or electrocardiogram is a composite recording of what?
- AAll the action potential produced by the heart
- BThe German spelling
44A pressure difference between two points causes a fluid to flow from _____ pressure to _____ pressure (pressure gradient)
- AHigh; Low
- BLow; High
45What are the four phases of the cardiac cycle?
- A-Ventricular filling
-Isovolumetric contraction
-Ventricular ejection
-Isovolumetric relaxation - B-Ventricles fill
-Blood stays
-Ventricles eject
-Blood leaves
- A-Ventricular filling
46The amount of blood ejected by each ventricle in ONE minute
- ACardiac arrest
- BCardiac output
47WHAT increases both heart rate and stroke volume?
- AMcDonalds
- BExercise
48Resting heart rate ABOVE 100 bpm; resting heart rate BELOW 60 bpm
- ATachycardia; Bradycardia
- BBradycardia, Tachycardia
49Where are the cardiac centers located?
- AMedulla oblongata
- BMedullary
50What is the cardiostimulatory effect?
- AStimulation of the cardiac muscle
- BTransmission of signals by way of the SNS to the SA node, AV node and myocardium to speed up the HR
51What is the cardioinhibitory effect?
- AStopping the heart
- BTransmission of signals by way of the vagus nerve to the SA and AV nodes to slow the HR
52Which receptors send signals to the medulla in response to bp changes?
- ABaro
- BChemo
53Which receptors send signals to the medulla in response to increase CO2, H or O2 to increase HR?
- AChem
- BBaro
54Hyperkalemia is what?
- AToo much potassium in the blood
- BToo little potassium in the blood
55Hypocalcemia is what?
- AToo little calcium in the blood
- BToo much calcium in the blood
Información
- Descripción
- Chapter 19: The Heart
- Autor
- stnsf
- Idioma
- English
- Visitas
- 11
- Etiquetas
- Valoración
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