Cardiovascular: Exam 1

51 Questions | Total Attempts: 80

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Cardiovascular Quizzes & Trivia

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Questions and Answers
  • 1. 
    Normal average blood pressure for a newborn baby is _______________________.
    • A. 

      120/80

    • B. 

      90/55

    • C. 

      150/90

    • D. 

      130/80

  • 2. 
    The influence of blood vessel diameter on peripheral resistance is __________________________.
    • A. 

      Insignificant because vessel diameter does not vary

    • B. 

      Significant because resistance is directly proportional to the blood vessel diameter

    • C. 

      The only factor that influences resistance

    • D. 

      Significant because resistance is inversely proportional to the fourth power of the vessel radius

  • 3. 
    The velocity of blood flow is _______________________.
    • A. 

      Slower in the veins than in the capillaries because veins have a large diameter

    • B. 

      Slower in the arteries than in capillaries because arteries possess a relatively large diameter

    • C. 

      Slowest in the capillaries because the total cross-sectional area is the greatest

    • D. 

      In direct proportion to the total cross-sectional area of the blood vessels

  • 4. 
    Which tunic of an artery is most responsible for maintaining blood pressure and continuous blood circulation?
    • A. 

      Tunica media

    • B. 

      Tunica intima

    • C. 

      Basement membrane

    • D. 

      Tunica externa

  • 5. 
    Select the statement about blood flow.
    • A. 

      It is measured in mm Hg.

    • B. 

      It is greatest where resistance is highest.

    • C. 

      It is relatively constant through all body organs

    • D. 

      Blood flow through the entire vascular system is equivalent to cardiac output

  • 6. 
    A patient with essential hypertension might have pressures of 200/120 mm Hg. This hypertensive state could result in all of the following changes except ____________.
    • A. 

      Increased incidence of coronary artery disease

    • B. 

      Decreased size of the heart muscle

    • C. 

      Increased work of the left ventricle

    • D. 

      Increased damage to blood vessel endothelium

  • 7. 
    Arteriole blood pressure increases in response to all but which of the following?
    • A. 

      Falling blood volume

    • B. 

      Increasing stroke volume

    • C. 

      Rising blood volume

    • D. 

      Increasing heart rate

  • 8. 
    Which statement best describes arteries?
    • A. 

      All carry blood away from the heart

    • B. 

      All carry oxygenated blood to the heart

    • C. 

      Only large arteries are lined with endothelium

    • D. 

      All contain valves to prevent the back flow of blood

  • 9. 
    Mechanisms that do not help regulate blood pressure include _______________________.
    • A. 

      Chemical controls such as atrial natriuretic peptide

    • B. 

      Renal regulation via the renin-angiotensin system of vasoconstriction

    • C. 

      Nervous control that operates via reflex arcs involving baroreceptors, chemoreceptors, and higher brain centers

    • D. 

      The dural sinus reflex

  • 10. 
    Cerebral blood flow is regulated by _________________
    • A. 

      ADH

    • B. 

      The hypothalamic "thermostat"

    • C. 

      Skin temperature

    • D. 

      Intrinsic auto regulatory mechanisms

  • 11. 
    Secondary hypertension can be created by ___________________.
    • A. 

      Obesity

    • B. 

      Smoking

    • C. 

      Arteriosclerosis

    • D. 

      Stress

  • 12. 
    Modified capillaries that are lined with phagocytes are called __________________.
    • A. 

      Thoroughfare channels

    • B. 

      Sinusoids

    • C. 

      Anastomoses

    • D. 

      Sinuses

  • 13. 
    The baroreceptors in the carotid sinus and aortic arch are sensitive to which of the following?
    • A. 

      A decrease in carbon dioxide

    • B. 

      A decrease in oxygen levels

    • C. 

      Changes in arterial pressure

    • D. 

      An increase in oxygen levels

  • 14. 
    The circulatory route that runs from the digestive tract to the liver is called _________________.
    • A. 

      Pulmonary circulation

    • B. 

      Coronary circulation

    • C. 

      Cerebral circulation

    • D. 

      Hepatic portal circulation

  • 15. 
    In the dynamics of blood flow through capillaries, hydrostatic pressure _____________________.
    • A. 

      Is the same as capillary blood pressure

    • B. 

      And osmotic pressure are the same

    • C. 

      Is completely canceled out by osmotic pressure

    • D. 

      Generally forces fluid from the interstitial space into the capillaries

  • 16. 
    Factors that aid venous return include all except _________________.
    • A. 

      Activity of skeletal muscles

    • B. 

      Urinary output

    • C. 

      Pressure changes in the thorax

    • D. 

      Venous valves

  • 17. 
    Which of the following would not result in the dilation of the feeder arterioles and opening of the precapillary sphincters in systemic capillary beds?
    • A. 

      A local increase in histamine

    • B. 

      An increase in local tissue carbon dioxide

    • C. 

      A decrease in local tissue oxygen content

    • D. 

      A local increase in pH

  • 18. 
    Aldosterone will _____________________________
    • A. 

      Decrease sodium reabsorption

    • B. 

      Promote an increase in blood pressure

    • C. 

      Promote a decrease in blood volume

    • D. 

      Result in a larger output of urine

  • 19. 
    The pule pressure is ____________________________.
    • A. 

      Systolic pressure divide by diastolic pressure

    • B. 

      Systolic pressure plus diastolic pressure

    • C. 

      Diastolic pressure plus 1/3 (systolic pressure plus diastolic pressure)

    • D. 

      Systolic pressure minus diastolic pressure

  • 20. 
    Histologically, the _____________ is squamous epithelium supported by a sparse connective tissue layer.
    • A. 

      Tunica adventitia

    • B. 

      Tunica intima

    • C. 

      Tunica externa

    • D. 

      Tunica media

  • 21. 
    Which of the following is a type of circulatory shock?
    • A. 

      Vascular, due to extreme vasodilation as a result of loss of vasomotor tone

    • B. 

      Hypovolemic, caused by increased blood volume

    • C. 

      Cariogenic, which results from any defect in blood vessels

    • D. 

      Circulatory, where blood volume is normal and constant

  • 22. 
    Which of the following is not one of the three main factors influencing blood pressure?
    • A. 

      Cardiac output

    • B. 

      Peripheral resistance

    • C. 

      Blood volume

    • D. 

      Emotional state

  • 23. 
    Which of the following signs of hypovolemic shock is a relatively late sign?
    • A. 

      Rapidly falling blood pressure

    • B. 

      Rapid, thready pulse

    • C. 

      Increased heart rate

    • D. 

      Cold, clammy skin

  • 24. 
    Brain blood flow autoregulation ______________________
    • A. 

      Is abolished when abnormally high CO2 levels persist

    • B. 

      Causes constriction of cerebral blood vessels in response to a drop in systemic blood pressure

    • C. 

      Is less sensitive to pH than to a decreased oxygen level

    • D. 

      Is controlled by cardiac centers in the pons

  • 25. 
    Which tunic of an artery contains endothelium?
    • A. 

      Basement membrane

    • B. 

      Tunica media

    • C. 

      Tunica externa

    • D. 

      Tunica intima