Chapter 19: Functions Of The Blood Vessels

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Blood Quizzes & Trivia
Function of blood vessels

  
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  • 1. 
    A sphygmomanometer measures
    • A. 

      Blood flow.

    • B. 

      Hematocrit.

    • C. 

      Blood pressure.

    • D. 

      Oxygen saturation.


  • 2. 
    Blood pressure is lowest in the
    • A. 

      Inferior vena cava.

    • B. 

      Aorta.

    • C. 

      Circle of Willis.

    • D. 

      Femoral artery.


  • 3. 
    The characteristic of the arteriole that allows it to function as a resistance vessel is its
    • A. 

      Thin membrane.

    • B. 

      Porous membrane.

    • C. 

      Valves.

    • D. 

      Smooth muscle.


  • 4. 
    Which condition is characterized by poor skin turgor?
    • A. 

      Expanded blood volume

    • B. 

      Pulmonary edema

    • C. 

      Varicose veins

    • D. 

      Dehydration


  • 5. 
    Which artery is most oftern used to measure the blood pressure?
    • A. 

      Carotid artery

    • B. 

      Brachial artery

    • C. 

      Femoral artery

    • D. 

      Circle of Willis


  • 6. 
    Which of the following best indicates why a person who is taking antihypertensive drugs should not drink alcohol or sit in a hot tub?
    • A. 

      Hypokalemia (low potassium) and flabby muscles

    • B. 

      Hypertensive crisis and stroke

    • C. 

      Vasodilation and hypotension

    • D. 

      Hemolysis and jaundice


  • 7. 
    Which of the following is true?
    • A. 

      CO= HR*SV*PULSE PRESSURE

    • B. 

      BP=CO*SV*R

    • C. 

      BP=SV*PULSE PRESSURE

    • D. 

      BP=SV*HR*R


  • 8. 
    Plasma oncotic pressure is due primarily to
    • A. 

      Blood pressure

    • B. 

      Plasma proteins, especially albumin

    • C. 

      Lymph

    • D. 

      Electrolytes such as sodium and chloride


  • 9. 
    Which of the following is most likely to induce a reflex bradycardia?
    • A. 

      Development of hypovolemic (low blood volume) shock, as in hemorrage

    • B. 

      Exertion of pressure over the carotid sinus (tight collar)

    • C. 

      Administration of nitroglycerine (a vasodilator drug)

    • D. 

      Administration of a diuretic for hypertension


  • 10. 
    If a child with nephrotic syndrome loses large amounts of albumin in his urine (albuminuria)
    • A. 

      Plasma oncotic pressure decreased and he develops edema.

    • B. 

      Capillary hydrostatic pressure increases, causing edema

    • C. 

      Plasma oncotic pressure increases, thereby 'pulling' fluid into the capillary, causing poor skin turgor

    • D. 

      Lymph flow decreases


  • 11. 
    If capillary hydrostatic pressure (CHP) exceeds plasma oncotic pressure,
    • A. 

      Fluid moves from the interstitium into the capillary

    • B. 

      No net flux of water occurs

    • C. 

      Blood volume expansion occurs

    • D. 

      Fluid is filtred into the interstitium


  • 12. 
    If plasma oncotic pressure exceeds (CHP),
    • A. 

      Fluid is filtred from the capillary into the interstitium

    • B. 

      Fluid moves osmotically into the capillary from the interstitium

    • C. 

      Plasma proteins diffuse from the capillary into the interstitium

    • D. 

      Blood volume decreases


  • 13. 
    Which of the following is most related to the systolic reading, diastolic reading,a nd Korotkoff sounds?
    • A. 

      Cardiac output

    • B. 

      Blood pressure

    • C. 

      The electrical activity of the heart

    • D. 

      Coronary blood flow


  • 14. 
    What do the baroreceptors regulate?
    • A. 

      Blood volume

    • B. 

      Hematocrit

    • C. 

      Blood pressure

    • D. 

      Rate of capillary filtration


  • 15. 
    Which of the following increases vascular reisistance, stroke volume, and heart rate?
    • A. 

      Stimulation of the vagus nerve

    • B. 

      Stimulation of the parasympathetic nervous system

    • C. 

      Administration of a sympatholytic drug

    • D. 

      Stimulation of the sympathetic nervous system


  • 16. 
    Which of the following structures has the greatest effect on vascular resistance?
    • A. 

      Veins

    • B. 

      Arterioles

    • C. 

      Heart

    • D. 

      Capillaries


  • 17. 
    Blood flow is slowest in the
    • A. 

      Aorta

    • B. 

      Capillaries

    • C. 

      Venules

    • D. 

      Arterioles


  • 18. 
    These blood vessels have very thin walls and are called the exchange vessels
    • A. 

      Arterioles

    • B. 

      Veins

    • C. 

      Capillaries

    • D. 

      Arteries


  • 19. 
    What is the pulse pressure when a person's blood pressure is 120/80 mm Hg?
    • A. 

      120

    • B. 

      80

    • C. 

      40

    • D. 

      Can't determine the pulse pressure from this info


  • 20. 
    Which of the following is most likely to develop if the pressure within the pulmonary capillaries increases?
    • A. 

      Pedal edema

    • B. 

      Pulsating jugular veins

    • C. 

      Pulmonary edema

    • D. 

      Varicose veins


  • 21. 
    What is the term that refers to the difference between the systolic and diastolic blood pressure reading?
    • A. 

      Pulse deficit

    • B. 

      Cardiac output

    • C. 

      Stroke volume

    • D. 

      Pulse pressure


  • 22. 
    Which of the following elevates blood pressure?
    • A. 

      Diuretics

    • B. 

      Vasodilators

    • C. 

      Vasopressors

    • D. 

      Antihypertensive drugs


  • 23. 
    Which term refers to drugs that cause vasodilation and reduce vascular resistance?
    • A. 

      Diuretics

    • B. 

      Antihypertensive drugs

    • C. 

      Inotropic drugs

    • D. 

      Sympathomimetic drugs


  • 24. 
    Which part of the brain participates in the baroreceptor reflex?
    • A. 

      Cerebrum

    • B. 

      Corpus callosum

    • C. 

      Cerebellum

    • D. 

      Medulla oblongata


  • 25. 
    Both epinephrine and norepinephrine are
    • A. 

      Steroids

    • B. 

      Secreted by the adrenal cortex

    • C. 

      Vasopressors

    • D. 

      Blood pressure-lowering hormones


  • 26. 
    A sudden rise in blood pressure is most likely to produce a baroreceptor-induced
    • A. 

      (+) inotropic effect

    • B. 

      Bradycardia

    • C. 

      Narrowed pulse pressure

    • D. 

      Increased heart rate


  • 27. 
    Which statement is not true about baroreceptors?
    • A. 

      Can induce a reflex tachycardia

    • B. 

      Located in the carotid sinus and aortic arch

    • C. 

      Activated by hypoxemia

    • D. 

      Activated by a hemorrahage-induced decline in blood pressure


  • 28. 
    If plasma osmolarity increases, as in dehydration or the infusion of mannitol (a sugar solution)
    • A. 

      Filtration rate increases

    • B. 

      Fluid is forced out of the capillary into the interstitium

    • C. 

      Fluid is "pulled" into the capillary from the interstitium

    • D. 

      Plasma proteins diffuse out of the capillary into the interstitium


  • 29. 
    If the lymphatic vessels are blocked or surgically removed,
    • A. 

      Excess fluid is filtered out of the capillary

    • B. 

      Plasma oncotic pressure decreases, thereby causing fluid to leak out of the capillary

    • C. 

      Fluid and protein accumulate in the interstitium, thereby causing edema

    • D. 

      Excess fluid moves into the capillary, thereby "drying out" the interstitium


  • 30. 
    Edema is least likely to occur in which of the following?
    • A. 

      Plasma oncotic pressure decreases because of starvation

    • B. 

      Plasma oncotic pressure decreases because the child filters large amounts of albumin into his urine.

    • C. 

      Plasma osmolarity increases when the patient becomes dehydrated

    • D. 

      A woman with breast cancer has surgery that involves a breast amputation and removal of the lymph nodes/vessels


  • 31. 
    If the left ventricle of the heart fails, blood backs up in the pulmonary capillary,
    • A. 

      Decreasing plasma oncotic pressure and drying out the lung

    • B. 

      Blocking the glow of lymph and drying out the lungs

    • C. 

      Increasing capillary hydrostatic pressure and forcing fluid into the lungs

    • D. 

      Increasing plasma oncotic pressure, causing pulmonary edema


  • 32. 
    A pregnant woman notices that her ankls are swollen after standing for 6 hrs. at her place of employment. In the evening when she elevates her feet, the swelling diminshes because
    • A. 

      Capillary bydrostatic pressure in the blood vessels of the lower extremities decrease

    • B. 

      Plasma oncotic pressure decreases

    • C. 

      Plasma oncotic pressure increases

    • D. 

      Lymphatic drainage decreases


  • 33. 
    An IV infusion of mannitol (a hypertonic sugar solution) is used todecrease intracranial pressure in a head-injured patient because the mannitol
    • A. 

      Provides calories for the lealing of the injured brain

    • B. 

      Is absorbed by the injured brain cells and pulls water into the brain cells from the tissue fluid

    • C. 

      Pulls water out of the interstitium of the brain into the capillaries, thereby relieving edema

    • D. 

      "clumps" the plasma proteins together, thereby severely diminshing plasma oncotic pressure


  • 34. 
    Capillary hydrostatic pressure is a reflection of
    • A. 

      Plasma proteins

    • B. 

      Albumin

    • C. 

      Lymph

    • D. 

      Blood pressure


  • 35. 
    Which of the following drugs is most likely to increase vascular resistance?
    • A. 

      (+) inotropic agent

    • B. 

      Arteriolar constrictor

    • C. 

      Arteriolar dilator

    • D. 

      Vasodilator


  • 36. 
    With which word/phrase is afterload most associated?
    • A. 

      Heart rate

    • B. 

      Arteriolar vasoconstriction

    • C. 

      (+) intotropic effect

    • D. 

      Venous return


  • 37. 
    Which of the following exerts a vasopressor effect?
    • A. 

      Diuretic

    • B. 

      Alpha1 adrenergic agonist

    • C. 

      Beta1 adrenergic antagonist

    • D. 

      Sympatholytic


  • 38. 
    A drug that activates alpha1 adrenergic receptors
    • A. 

      Causes a vasodepressor effect

    • B. 

      Is classified as a (+) inotropic drug

    • C. 

      Elevates blood pressure

    • D. 

      Is classified as an antihypertensive drug


  • 39. 
    A newly diagnosed hypertensive patient is started on prazosin. Within the hour, he complains of dizziness and loses consciousness. What has happened?
    • A. 

      The drug activated the baroreceptors causing an intense parasympathetic discharge, thereby increasing blood pressure and precipitating a mild stroke

    • B. 

      The prazosin has decreased his blood pressure too much; the drug-induced hypotension caused the fainting event (syncope)

    • C. 

      The prazosin causes spasm of the cerebral blood vessels, which, in turn, causes loss of consciousness

    • D. 

      The patient experienced a hypertensive crisis


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