Visceral Phys Exam II

34 Questions | Total Attempts: 214

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Physics Quizzes & Trivia

Visceral Phys study


Questions and Answers
  • 1. 
    Increase in sodium ion influx during the myocardial action potential occurs during which of the following phases?
    • A. 

      Phase 0

    • B. 

      Phase 1

    • C. 

      Phase 2

    • D. 

      Phase 3

    • E. 

      Phase 4

  • 2. 
    Sympathethic stimulation will not cause which of the following?
    • A. 

      Increase stroke volume

    • B. 

      Increase cardiac output

    • C. 

      Coronary vasodilation

    • D. 

      Systemic vasodilation

  • 3. 
    The speed of conduction of the myocardial action potential is fastest in the 
    • A. 

      Purkinje system

    • B. 

      Bundle of His

    • C. 

      AV Node

    • D. 

      SA Node

    • E. 

      Speed is constant

  • 4. 
    A weak myocardium can result in:
    • A. 

      Decrease in left ventricular ejection volume

    • B. 

      Peripheral and Pulmonary edema

    • C. 

      Bradycardia

    • D. 

      Only A and B above are correct

    • E. 

      A, B, and C above are correct

  • 5. 
    Arteriolar constriction is mediated exclusively by vascular__________.
    • A. 

      Muscarinic ACh receptors

    • B. 

      Alpha-adrenergic receptors

    • C. 

      Nicotinic ACh receptors

    • D. 

      Beta-adrenergic receptors

  • 6. 
    The Frank-Starling Law of the heart best correlates with which of the following statements?
    • A. 

      When the End-Diastolic Volume increases Stroke Volume will decrease.

    • B. 

      Heart Rate will increase when the core body temperature increases

    • C. 

      Sympathetic stimulation will cause tachycardia

    • D. 

      Left ventricular ejection volume will increase when systemic venous return increases

    • E. 

      Systemic hypotension will elicit compensatory tachycardia

  • 7. 
    Which of the following will not cause arteriolar constriction?
    • A. 

      Renin

    • B. 

      Epinephrine

    • C. 

      Norepinephrine

    • D. 

      Angiotensin I

    • E. 

      Angiotensin II

  • 8. 
    Which of the following statements is/are correct regarding venous return?
    • A. 

      Valves prevent flow of blood from the periphery to the heart.

    • B. 

      Decrease in venous return will decrease subsequent stroke volume

    • C. 

      Sympathetic stimulation will cause dilation of the veins and thereby increase venous return

    • D. 

      Parasympathetic stiumlation will cause venular dilation and thereby increase venous return.

  • 9. 
    Angiotensinogen is synthesized in the __________and is converted to ____________by the enzyme______________that is released from the granular cells in the afferent arterioles of the glomeruli.
    • A. 

      Lungs;Angiotensin I; Renin

    • B. 

      Liver; Angiotensin I; Renin

    • C. 

      Lungs; Angiotensin II; Renin

    • D. 

      Liver; Angiotensin II; Renin

  • 10. 
    The Tubulo-Glomerular Feedback mechanism to maintain urine formation involves which of the following substances?
    • A. 

      Renin

    • B. 

      Aldosterone

    • C. 

      Anti-Diuretic Hormone

    • D. 

      Angiotensin Converting Enzyme

  • 11. 
    The cation that helps mainatin blood volume is _________________.
    • A. 

      Calcium

    • B. 

      Potassium

    • C. 

      Sodium

    • D. 

      Magnesium

  • 12. 
    Slow depoarization in cells of the sino-atrial node are due to influx of 
    • A. 

      Calcium ions

    • B. 

      Sodium ions

    • C. 

      Potassium ions

    • D. 

      Chloride ions

  • 13. 
    A person with Hyper-aldosteronism will present with which of the following?
    • A. 

      Low blood volume

    • B. 

      Hypokalemia

    • C. 

      Hypotension

    • D. 

      All of the above

    • E. 

      None of the above

  • 14. 
    All of the following EXCEPT___________will cause systemic blood pressure to rise.
    • A. 

      Hyperaldosteronism

    • B. 

      Excessive ADH

    • C. 

      Excessive renin secretion

    • D. 

      Increase in vagal tone

  • 15. 
    Which hormone causes Na+ excretion?
    • A. 

      Atrial Natriuretic Peptide

    • B. 

      Anti-Diuretic Hormone

    • C. 

      Aldosterone

    • D. 

      Angiotensin Converting Enzyme

  • 16. 
    Which of the following does NOT normally participate in the Tubulo-Glomerular Feedback mechanism  to regulate Glomerular Filtration Rate?
    • A. 

      Angiotensin I

    • B. 

      Angiotensin II

    • C. 

      Cells of macula densa

    • D. 

      Granular Cells of the afferent arteriole

  • 17. 
    A heart rate of 60-100/minute represents___________________.
    • A. 

      Normal sinus rhythm

    • B. 

      Sinus bradycardia

    • C. 

      Sinus tachycardia

    • D. 

      None of the above

  • 18. 
    Which is NOT correct regarding the myocardium?
    • A. 

      Mm. contractions are always preceded by mm. action

    • B. 

      Both atria contract simultaneously

    • C. 

      Ventricular contractions are delayed after atria contract

    • D. 

      Hypocalcemia will cause stroke volume to increase

  • 19. 
    The normal axis of the heart is _____________.
    • A. 

      0 degrees

    • B. 

      60 degrees

    • C. 

      120 degrees

    • D. 

      180 degrees

    • E. 

      240 degrees

  • 20. 
    Arteriolar diameter is predominantly dependent upon sympathetic tone in which of the following vascular beds?
    • A. 

      Coronary

    • B. 

      Cutaneous

    • C. 

      Cerebral

    • D. 

      Pulmonary

  • 21. 
    Stimulation of which of the following will NOT increase systemic blood pressure?
    • A. 

      Adrenergic receptors in the SA node

    • B. 

      Adrenergic receptors in the myocardium

    • C. 

      MACh receptors in the SA node

    • D. 

      Adrenergic receptors in the peripheral vasculature

  • 22. 
    The plateau phase of the myocardial action potential influx of which ion?
    • A. 

      Sodium

    • B. 

      Potassium

    • C. 

      Calcium

    • D. 

      Magnesium

  • 23. 
    The major source of calcium ions for myocardial contractions is which of the following?
    • A. 

      Extracellular fluid

    • B. 

      Mitochondria

    • C. 

      Sarcoplasmic reticulum

    • D. 

      Endoplasmic reticulum

  • 24. 
    Myocardial tissues function as syncitia because of which structural characteristics?
    • A. 

      Branched nature of the myocardial fiber

    • B. 

      Presence of cell to cell communication pathways

    • C. 

      Presence of large number of mitochondria

    • D. 

      Only a and b above are correct

    • E. 

      A, B, and C above are correct

  • 25. 
    Increase in Ca+2 for subsequent contraction occurs during which phase of the myocardial action potential?
    • A. 

      Phase 0

    • B. 

      Phase 1

    • C. 

      Phase 2

    • D. 

      Phase 3

    • E. 

      Phase 4

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