A&p 2 The Heart
Glands, heart, vessels
- 1.Normal heart sounds are caused by which of the following events?
- A.
Excitation of the SA node
- B.
Closure of the heart valves
- C.
Friction of blood against the chamber walls
- D.
Opening and closing of the heart valves
- 2.Which of the events below does not occur when the semilunar valves are open?
- A.
Ventricles are in diastole
- B.
Blood enters pulmonary artieries and the aorta
- C.
Av valves are closed
- D.
Ventricles are in systole
- 3.Hemrrhage with a large loss of blood causes
- A.
A lowering of blood pressure due to change in cardiac output
- B.
A rise in blood pressure due to change in cardiac output
- C.
No change in blood pressure but a slower heart rate
- D.
No change in blood pressure but a change in respiration
- 4.The left ventricular wall of the heart is thicker than the right wall in order to
- A.
Acoommodate a greater volume of blood
- B.
Expand the thracic cage during diastole
- C.
Pump blood with greater pressure
- D.
Pump blood through a smaller valve
- 5.Damage to the__________ is referred to as heart block
- A.
SA node
- B.
AV valves
- C.
AV bundles
- D.
AV node
- 6.The p wave of a normal electrocardiogram indicates_____________
- A.
Ventricular repolarization
- B.
Ventricular depolarization
- C.
Atrial repolarization
- D.
Atrial depolarization
- 7.Blood within the pulmonary veins returns to the
- A.
Right atrium
- B.
Left atrium
- C.
Right ventricle
- D.
Left ventricle
- 8.Small muscle masses attached to the chordae tendineae are the
- A.
Trabeculae carneae
- B.
Pectinate muscles
- C.
Papillary muscles
- D.
Venae cavae
- 9.The term for pain associated with deficient blood delivery to the heart that may be caused by the transient spasm of coronary arteries is
- A.
Ischemia
- B.
Pericarditis
- C.
Myocardial infarct
- D.
Angina pectoris
- 10.To auscultate the aortic semilunar valve, you would place your stethoscope in the
- A.
Second intercostal space to the right of the sternum
- B.
Second intercostal space to the left of the sternum
- C.
Fifth intercostal space inferior to the left nipple
- D.
Fifth right intercostal space
- 11.The source of blood carried to capillaries in the myocardium would be the
- A.
Coronary sinus
- B.
Fossa ovalis
- C.
Coronary arteries
- D.
Coronary veins
- 12.The fact that the left ventricle of the heart is thicker than the right ventricle reveals that it
- A.
Pumps a greater volume of blood
- B.
Pumps blood against a greater resistance
- C.
Expands the thoracic cage
- D.
Sends blood through a smaller valve
- 13.Which of the following factors does not influence heart rate
- A.
Skin color
- B.
Age
- C.
Gender
- D.
Body temperature
- 14.Which of the following is not an age-related change affecting the heart?
- A.
Atherosclerosis
- B.
Decline in cardiac reserve
- C.
Fibrosis of cardiac muscle
- D.
Thinning of the valve flaps
- 15.If cardiac muscle is deprived of its normal blood supply, damage would primarily result from
- A.
Decreased delivery of oxygen
- B.
A decrease in the number of available mitochondria for energy production
- C.
A lack of nutrients to feed into metabolic pathways
- D.
An inadequate supply of lactic acid
- 16.If the length of the absolute refractory period in cardiac muscle cells was the same as it is for skeletal muscle cells
- A.
It would be much longer before cardiac cells could respond to a second stimulation
- B.
Contractions would last as long as the refractory period
- C.
Tetanic contractions might occur, which would stop the hearts pumping action
- D.
It would be less than 1 2 ms
- 17.Norepinephrine acts on the heart by
- A.
Decreasing heart contractility
- B.
Causing a decrease in stroke volume
- C.
Blocking the action of calcium
- D.
Causing threshold to be reached more quickly
- 18.If the vagal nerves to the heart were cut, the result would be that
- A.
The heart would stop, since the vagal nerves trigger the heart to contract
- B.
The heart rate would increase by about 25 beats per minute
- C.
The av node would become the pacemaker of the heart
- D.
Parasympathetic stimulation would increase, causing a decrease in heart rate
- 19.Foramen ovale
- A.
Connects the two atria in the fetal heart
- B.
Is a condition in which the heart valves do not completley close
- C.
Is a shallow depression in the intreventricular septum
- D.
Is a connection between the pulmonary trunk and the aorta in the fetus
- 20.Which vessel of the heart recieves blood during right ventricular systole?
- A.
Venae cavae
- B.
Pulmonary trunk
- C.
Aorta
- D.
Pulmonary veins
- 21.Which of these vessels receives blood during ventricular systole?
- A.
Aorta only
- B.
Pulmonary arteries only
- C.
Pulmonary veins only
- D.
Both aorta and pulmonary trunk
- 22.Which of the following is not part of the conduction system of the heart?
- A.
AV node
- B.
Bundle of His
- C.
AV valve
- D.
SA node
- 23.The tricuspid valve is closed
- A.
While the ventricle is in diastole
- B.
When the ventricle is in systole
- C.
While the atrium is contracting
- D.
By the movement of blood from the atrium to ventricle
- 24.When viewing a dissected heart, it is easy to visually discern the right and left ventricles by
- A.
Tracing out where the auricles connect
- B.
Noticing the thickness of the venricle walls
- C.
Locating the apex
- D.
Finding the papillary muscles
- 25.Select the correct statement about the heart valves
- A.
The mitral valve seperates the right atrium from the right ventricle
- B.
The tricuspid valve divides the left atrium from the left ventricle
- C.
Aortic and pulmonary valves control the flow of blood into the heart
- D.
The AV valves are supported by chordae tendineae so that regurgitation of blood into the atria during ventricle contaction does not occur
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