Circulatory System (The Heart)

57 Questions | Total Attempts: 287

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Circulatory System (The Heart)

A test about circulatory system (heart).


Questions and Answers
  • 1. 
    The outermost layer of the pericardium, which consists of inelastic dense irregular connective tissue, is called the
    • A. 

      Pericardial cavity

    • B. 

      Parietal layer of pericardium

    • C. 

      Fibrous pericardium

    • D. 

      Epicardium

    • E. 

      Serous pericardium

  • 2. 
    This consists of mesothelium and connective tissue.
    • A. 

      Fibrous pericardium

    • B. 

      Endocardium

    • C. 

      Pericardial cavity

    • D. 

      Epicardium

    • E. 

      Myocardium

  • 3. 
    Which layer consists of cardiac muscle tissue?
    • A. 

      Epicardium

    • B. 

      Pericardium

    • C. 

      Hypocardium

    • D. 

      Myocardium

    • E. 

      Endocardium

  • 4. 
    This pouch-like structure increases the total filling capacity of the atrium.
    • A. 

      Ventricle

    • B. 

      Coronary sulcus

    • C. 

      Fossa ovalis

    • D. 

      Interatrial septum

    • E. 

      Auricle

  • 5. 
    These muscular ridges are found on the anterior wall of the right atrium and extend into the auricles.
    • A. 

      Papillary muscles

    • B. 

      Trabeculae carneae

    • C. 

      Chordae tendinae

    • D. 

      Coronary sulci

    • E. 

      Pectinate muscles

  • 6. 
    What types of tissue comprise the valves of the heart?
    • A. 

      Dense connective tissue

    • B. 

      Areolar connective tissue

    • C. 

      Hyaline cartilage

    • D. 

      Cardiac muscle tissue

  • 7. 
    From the left ventricle, where does blood pass?
    • A. 

      Aortic semilunar valve

    • B. 

      Pulmonary trunk

    • C. 

      Right ventricle

    • D. 

      Right atrium

    • E. 

      Bicuspid valve

  • 8. 
    In a fetus, this structure temporarily shunts blood from the pulmonary trunk into the aorta.
    • A. 

      Foramen ovale

    • B. 

      Trabeculae carnae

    • C. 

      Fossa ovalis

    • D. 

      Descending aorta

    • E. 

      Ductus arteriosus

  • 9. 
    As each ventricle contracts where does blood move?
    • A. 

      Into the apex

    • B. 

      Through the apex

    • C. 

      Into an artery

    • D. 

      Through an atrioventricular valve

    • E. 

      Into a vein

  • 10. 
    As each atrium contracts where does blood move?
    • A. 

      Into a vein

    • B. 

      Into an artery

    • C. 

      Through an atrioventricular valve

    • D. 

      Through a semilunar valve

    • E. 

      Into an auricle

  • 11. 
    Which valve below prevents blood from flowing back into the right ventricle?
    • A. 

      Pulmonary valve

    • B. 

      Tricuspid valve

    • C. 

      Aortic valve

    • D. 

      Pulmonary vein

    • E. 

      Bicuspid valve

  • 12. 
    In this disorder the aortic valve is narrowed.
    • A. 

      Mitral valve prolapse

    • B. 

      Mitral insufficiency

    • C. 

      Aortic insufficiency

    • D. 

      Aortic stenosis

    • E. 

      Rheumatic fever

  • 13. 
    This heart structure(s) carries deoxygenated blood.
    • A. 

      Left atrium and ventricle

    • B. 

      Left atrium only

    • C. 

      Right ventricle only

    • D. 

      Right atrium and ventricle

    • E. 

      Left atrium and right ventricle

  • 14. 
    Cardiac muscle fibers electrically connect to neighboring fibers by
    • A. 

      Intermediate discs

    • B. 

      Gap junctions

    • C. 

      Contractile fibers

    • D. 

      Chordae tendinae

    • E. 

      Desmosomes

  • 15. 
    This is a the correct sequence of structures that allows the normal sequence of excitation to progress through the heart.
    • A. 

      Bundle of His, SA node, AV node, Purkinje fibers

    • B. 

      Sinoatrial (SA), Purkinje fibers, AV node, Bundle of His

    • C. 

      Purkinje fibers, AV node, SA node, Bundle of His

    • D. 

      SA node, AV node, Bundle of His, Purkinje fibers

    • E. 

      Bundle of His, Purkinje fibers, Atrioventricular (AV) node

  • 16. 
    This term refers to the period of time during a cardiac cycle when contraction occurs and blood pressure rises.
    • A. 

      Systole

    • B. 

      Repolarization

    • C. 

      Fibrillation

    • D. 

      Filling

    • E. 

      Diastole

  • 17. 
    During which of following periods does the largest volume of blood enter the arteries?
    • A. 

      Atrial diastole

    • B. 

      Ventricular diastole

    • C. 

      Atrial systole

    • D. 

      Ventricular systole

  • 18. 
    The second heart sound (dupp) closely follows which of the events listed below.
    • A. 

      Semilunar valves opening

    • B. 

      Atrioventricular valves opening

    • C. 

      Atrioventricular valves closing

    • D. 

      Semilunar valves closing

    • E. 

      Valvular stenosis

  • 19. 
    This part of the heart can initiate a contraction and can set a constant heart rate of about 100 beats per minute.
    • A. 

      Cardiovascular center

    • B. 

      Sinoatrial SA node

    • C. 

      Cardiac accelerator nerves

    • D. 

      Chemoreceptors

    • E. 

      Proprioceptors

  • 20. 
    Which of the below reduces heart rate.
    • A. 

      Increased sympathetic stimulation

    • B. 

      Increased Norepinephrine hormone

    • C. 

      Increased Thyroid hormone

    • D. 

      Increased calcium levels

    • E. 

      Increased potassium levels

  • 21. 
    This part of the brain contains the cardiovascular center that regulates heart rate.
    • A. 

      Medulla oblongata

    • B. 

      Thalamus

    • C. 

      Cerebellum

    • D. 

      Midbrain

    • E. 

      Cerebrum

  • 22. 
    Which of the below factors would increase Stroke volume?
    • A. 

      Increased preload, increased afterload, decreased contractility

    • B. 

      Increased preload, increased afterload, increased contractility

    • C. 

      Decreased preload, decreased afterload, decreased contractility

    • D. 

      Decreased preload, increased afterload, increased contractility

    • E. 

      Increased preload, decreased afterload, increased contractility

  • 23. 
    This portion of the heart wall is responsible for the pumping action.
    • A. 

      E

    • B. 

      I

    • C. 

      F

    • D. 

      G

    • E. 

      H

  • 24. 
    This is comprised of a thin layer of endothelium overlying a thin layer of connective tissue.
    • A. 

      E

    • B. 

      C

    • C. 

      D

    • D. 

      G

    • E. 

      F

  • 25. 
    Which layer of the pericardium consists of dense irregular connective tissue?
    • A. 

      E

    • B. 

      A

    • C. 

      B

    • D. 

      C

    • E. 

      D