Cardiac System

Card Set Information

Author:
ambirc
ID:
139231
Filename:
Cardiac System
Updated:
2012-03-02 23:46:35
Tags:
Cardiac system 102
Folders:

Description:
Cardiac system a&P 102
Show Answers:

Home > Flashcards > Print Preview

The flashcards below were created by user ambirc on FreezingBlue Flashcards. What would you like to do?


  1. An artery is defined as:
    A. a microscopic blood vessel
    B. a vessel that carries blood toward the heart
    C. a vessel that carries deoxygenated blood
    D. a vessel that carries oxygenated blood
    E. a vessel that carries blood away from the heart
    E. a vessel that carries blood away from the heart
    (this multiple choice question has been scrambled)
  2. The ____________ collects blood
    from all other veins draining the myocardium and returns this blood to the
    right atrium.

    a. great cardiac vein

    b. left circumflex artery

    c. posterior cardiac vein

    d. coronary sinus

    e. middle cardiac vein
    d. coronary sinus
  3. On the electrocardiogram, repolarization
    of the atria is represented by the:

    a. p-wave

    b. QRS complex

    c. T-wave

    d. p-Q segment

    e. it does not appear on the EKG
    since it is obscured by the QRS complex
    e. it does not appear on the EKGsince it is obscured by the QRS complex
  4. An artery is defined as:
    a. a vessel that carries blood away from the heart
    b. a vessel that carries oxygenated blood
    c. a vessel that carries blood toward the heart
    d. a vessel that carries deoxygenated blood
    e. a microscopic blood vessel
  5. The valve that lies between the
    right atrium and the right ventricle is the

    a. aortic semilunar valve

    b. tricuspid valve

    c. mitral valve

    d. bicuspid valve

    e. pulmonary semilunar valve
    b. tricuspid valve
  6. . The anterior interventricular artery and the
    circumflex artery are the main branches of the right coronary artery
    False
  7. A sudden drop in blood pressure will cause a
    reflexive increase in the heart rate.
    True
  8. The lining of the chambers and the covering of
    the heart are a simple squamous epithelium overlying a thin layer of loose connective tissue.
    True
  9. Which of the following valves keeps blood from
    backing up into the left ventricle?
    True
  10. . Which of the following valves
    keeps blood from backing up into the left ventricle?

    a. pulmonary valve

    b. bicuspid valve

    c. aortic valve

    d. tricuspid valve
    c. aortic valve
  11. The pulmonary valve has string-like chordae
    tendinae and papillary muscles that prevent the valve cusps from prolapsing during right ventricular contraction.
    False
  12. . Death of heart muscle from
    lack of oxygen is known as a myocardial infarction (MI), but what is temporary
    myocardial ischemia called?

    a. cardiac stenosis

    b. cardiac defibrillation

    c. angina pectoris

    d. cardiac arrest
    c. angina pectoris
  13. When the ventricles relax, blood in the aorta flows back toward the heart, filling the coronary arteries.
    True
  14. 15. Which of the following
    structures allow one cardiac cell to electronically stimulate another by
    allowing ion flow across the intercalated disk?

    a. fascia adherens

    b. gap junctions

    c. desmosomes

    d. intercellular folds
    b. gap junctions
  15. The small patch of heart tissue
    that depolarizes spontaneously to begin each heartbeat is the

    a. node of His.

    b. sinoatrial node. (SA node)

    c. atrioventricular node.

    d. superior cardiac node.
    b. sinoatrial node. (SA node)
  16. Any abnormal cardiac contraction pattern is called an arrhythmia, including atrial flutters and ventricular fibrillation.
    True
  17. Which of the following statements is incorrect?
    a. The firing of the SA node
    stimulates both atria to contract almost simultaneously.
    b. The signal to contract is
    delayed at the AV node, allowing the ventricles to fill with blood.
    c. Firing signals reach the
    papillary muscles before the rest of the ventricular myocardium.
    d. Ventricular contraction begins at
    the AV valves and progresses downward toward the apex of the heart.
    d. Ventricular contraction begins atthe AV valves and progresses downward toward the apex of the heart.
  18. An EEG is a composite recording
    of all of the action potentials produced by the heart.

    True False
    False
  19. . Which of the following is the
    correct sequence of events occurring in the cardiac cycle?
    • a. atrial systole, atrial diastole,
    • ventricular systole, and ventricular diastole
  20. . It is essential that both ventricles eject the
    same amount of blood even though the pressure in the right ventricle is much
    less than the pressure in the left ventricle.
    True
  21. In a resting person, a red blood cell leaving
    the left ventricle will, on average, arrive back at the left ventricle in

    a. 30 seconds.

    b. 60 seconds.

    c. 90 seconds.

    d. 120 seconds.
    b. 60 seconds.
  22. A resting adult heart rate above 100 beats per
    minute is known as bradycardia.
    False
  23. Activity in the cardioinhibitory center slows the heart because sympathetic nerves secrete norepinephrine onto the SA and AV nodes.
    False
  24. Hypercapnia, or excess blood levels of CO2,
    causes acidosis that decreases the heart rate.
    False
  25. . All of the following are
    cardiac stimulants except

    a. epinephrine.

    b. caffeine, nicotine, and
    chocolate.

    c. thyroid hormone.

    d. potassium and calcium ions.
    d. potassium and calcium ions.
  26. This chamber has to work harder
    than the others, so it has the thickest myocardium:

    a. sinus venosus

    b. right ventricle

    c. right atrium

    d. left atrium

    e. left ventricle
    e. left ventricle
  27. These prevent AV valve
    prolapse:

    a. trabeculae carneae

    b. chordae tendineae and papillary
    muscles

    c. valvular stenosis

    d. semilunar and aortic valves

    e. aortic and pulmonary blood
    pressure
    b. chordae tendineae and papillarymuscles
  28. Of the pathways listed, which correctly describes
    a route that blood can take in a normal human?
    • left atrium > bicuspid valve > left
    • ventricle > aortic semilunar valve
  29. Myocardial ischemia can lead
    to:

    a. freer drainage

    b. vein blockage

    c. thinner blood

    d. tissue death

    e. endothelium
    d. tissue death
  30. An effectively three-chambered heart, as in septal defects, can lead to:

    a. mixing of oxygenated and deoxygenated blood

    b. surplus oxygen in the blood

    c. sinus venosus

    d. vein blockage

    e. double circulation
    a. mixing of oxygenated and deoxygenated blood
  31. . The most correct sequence in the cardiac
    conduction system is:
    • SA node > AV node > AV
    • bundle > bundle branches > Purkinje fibers
  32. Myocardial ischemia can lead
    to:

    a. freer drainage

    b. vein blockage

    c. thinner blood

    d. tissue death

    e. endothelium
    d. tissue death
  33. The QRS interval on an
    electrocardiogram represents the electrical events related to the:

    a. closure of the AV valves

    b. ventricular depolarization

    c. ventricular repolarization

    d. atrial depolarization

    e. semilunar valve closure
    b. ventricular depolarization
  34. All of the following can cause
    an increase in cardiac output except:

    a. falling blood pH

    b. increased preload

    c. decreased end diastolic volume

    d. reduced number of vagal signals

    e. epinephrine
    c. decreased end diastolic volume
  35. The layer of the heart that
    forms a smooth, protective lining of the heart chambers and valves is the .

    a. Endocardium

    b. epicardium

    c. myocardium

    d. parietal pericardium
    b. epicardium
  36. The bicuspid valve .

    A. is located on the left side of the heart
    B. guards the entrance to the pulmonary trunk
    C. guards the auricles of theheart
    D. guards the entrance to the aorta
    A. is located on the left side of the heart
    (this multiple choice question has been scrambled)
  37. The ? has the thickest wall because it pumps blood
    to the ? .

    a. right atrium; systemic circuit

    b. left atrium; lungs

    c. right ventricle; lungs

    d. left ventricle; systemic circuit
    d. left ventricle; systemic circuit
  38. Freshly oxygenated blood enters ?
    the heart through the ? , and is pumped
    out the .

    a. right atrium; aorta

    b. right ventricle; pulmonary arteries

    c. left atrium; aorta

    d. left ventricle; pulmonary arteries
    c. left atrium; aorta
  39. When do the A-V valves close during the cardiac cycle?

    A. when pressure inside the ventricles is at its lowest
    B. when pressure inside the atria is greater than that inside the ventricles
    C. when ventricular pressure exceeds that of the atria
    D. when pressure is greater in the aorta than in the left ventricle
    C. when ventricular pressure exceeds that of the atria
    (this multiple choice question has been scrambled)
  40. How does the impulse to contract slow down slightly before it is transferred into the ventricles?

    A. The skeleton of the heart prevents the impulse from being transmitted rapidly.
    B. Junctional fibers leading into the AV node have very small diameters.
    C. There is a parasympathetic brake on the AV node.
    D. It makes a detour and travels to the brain and back.
    B. Junctional fibers leading into the AV node have very small diameters
    (this multiple choice question has been scrambled)
  41. A unique venous system, called
    the ,
    carries blood directly from the intestines to the liver for processing rather
    than directly into the inferior vena cava.

    a. hepatic portal system

    b. saphenous vein

    c. superior mesenteric vein

    d. gonadal vein
    a. hepatic portal system
  42. A condition in which there is a
    congenital predisposition for a ruptured aorta is .

    a. fatty acid metabolism disorder

    b. Marfan syndrome

    c. Niemann-Pick type C disease

    d. Coronary artery disease
    b. Marfan syndrome
  43. Which structure contains the
    lowest amount of oxygen?

    a. pulmonary vein

    b. vena cava

    c. aorta

    d. left ventricle
    b. vena cava
  44. . Cardiac output can be
    determined by the following formula:

    a. HR – SV

    b. HR + SV

    c. HR divided by SV

    d. HR x SV
    d. HR x SV
  45. The first heart sound is caused
    by closure of the valves.

    a. pulmonary semilunar

    b. aortic semilunar

    c. atrioventricular

    d. mitral
    c. atrioventricular
  46. The last in the cardiac
    conduction sequence is the .

    a. SA node

    b. AV bundle

    c. AV node

    d. Purkinje fibers
    d. Purkinje fibers
  47. The electrical initiation of a
    heartbeat begins in the chamber wall.

    a. left ventricle

    b. right atrium

    c. right ventricle

    d. left atrium
    b. right atrium
  48. The central cardiac control
    region is in the of the brain.

    a. Hypothalamus

    b. cerebellum

    c. medulla oblongata

    d. pons
    c. medulla oblongata
  49. The T wave of an electrocardiogram represents which event?

    a. ventricular depolarization

    b. ventricular repolarization

    c. atrial repolarization

    d. atrial depolarization
    b. ventricular repolarization
  50. A heartbeat of less than 60
    beats per minute is called .

    a. Tachycardia

    b. arrhythmia

    c. bradycardia

    d. fibrillation
    c. bradycardia
  51. The right and left sides of the heart are separated by the interventricular septum.
    False
  52. Blood in all veins is relatively low in oxygen.
    False
  53. When an atrium is in systole
    the ventricle is in diastole.
    True

What would you like to do?

Home > Flashcards > Print Preview