A And P II - Midterm Lecture Practice Test

59 Questions | Total Attempts: 412

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Questions and Answers
  • 1. 
    ______________ have the thickest tunica media.
    • A. 

      Large arteries

    • B. 

      Large veins

    • C. 

      Capillaries

    • D. 

      Small arteries

    • E. 

      Small veins

  • 2. 
    In people who stand for long periods, blood tends to pool in the lower limbs and this may result in varicose veins. Varicose veins are caused by
    • A. 

      An aneurysm or weak point in an artery.

    • B. 

      A ruptured aneurysm in a vein.

    • C. 

      Failure of the venous valves.

    • D. 

      An aneurysm or weak point in a vein.

    • E. 

      Failure of the lymphatic valves.

  • 3. 
    What is the mean arterial pressure for a person with 110 and 65 mm Hg as systolic and diastolic pressure, respectively?
    • A. 

      45 mm Hg

    • B. 

      90 mm Hg

    • C. 

      80 mm Hg

    • D. 

      175 mm Hg

    • E. 

      87.5 mm Hg

  • 4. 
    The velocity of blood flow decreases when
    • A. 

      Viscosity increases.

    • B. 

      Afterload increases.

    • C. 

      Vessel radius increases.

    • D. 

      Vasomotion decreases.

    • E. 

      Blood pressure increases.

  • 5. 
    The medullary ischemic reflex results in
    • A. 

      Increased circulation to the adrenal medulla.

    • B. 

      Increased circulation to the brain.

    • C. 

      Ischemia of the medulla oblongata.

    • D. 

      Reduced circulation to the brain.

    • E. 

      Hormone secretion by the adrenal medulla when perfusion drops.

  • 6. 
    All of these increase blood pressure except
    • A. 

      Angiotensin II.

    • B. 

      Antidiuretic hormone (ADH).

    • C. 

      Atrial natriuretic peptide.

    • D. 

      Norepinephrine.

    • E. 

      Aldosterone.

  • 7. 
    The vasomotor center of the __________________ controls blood vessels throughout the body.
    • A. 

      Medulla oblongata

    • B. 

      Cortex

    • C. 

      Cerebellum

    • D. 

      Spinal cord

    • E. 

      Hypothalamus

  • 8. 
    ____________ are powerful vasoconstrictors, and _______________ also increases heart rate.
    • A. 

      Epinephrine and angiotensin II; epinephrine

    • B. 

      Epinephrine and antidiuretic hormone (ADH); antidiuretic hormone (ADH)

    • C. 

      Norepinephrine and atrial natriuretic peptide (ANP); norepinephrine

    • D. 

      Norepinephrine and antidiuretic hormone (ADH); antidiuretic hormone (ADH)

    • E. 

      Epinephrine and aldosterone; epinephrine

  • 9. 
    The most important force driving filtration at the arterial end of a capillary is
    • A. 

      Interstitial hydrostatic pressure.

    • B. 

      Oncotic pressure.

    • C. 

      Blood hydrostatic pressure.

    • D. 

      Blood colloid osmotic pressure.

    • E. 

      Tissue fluid colloid osmotic pressure.

  • 10. 
    The most important force driving reabsorption at the venous end of a capillary is
    • A. 

      Tissue fluid colloid osmotic pressure.

    • B. 

      Interstitial hydrostatic pressure.

    • C. 

      Blood colloid osmotic pressure.

    • D. 

      Oncotic pressure.

    • E. 

      Blood hydrostatic pressure.

  • 11. 
    ____________ would not increase capillary filtration.
    • A. 

      Dietary protein deficiency

    • B. 

      Obstructed venous return

    • C. 

      Dehydration

    • D. 

      Blockage of lymphatic capillaries

    • E. 

      Increased capillary permeability

  • 12. 
    A mean arterial pressure (MAP) below 60 mmHg can cause _____, whereas a MAP above 160 mmHg can cause _____________.
    • A. 

      Syncope; cerebral edema

    • B. 

      Syncope; neurogenic shock

    • C. 

      Neurogenic shock; cardiogenic shock

    • D. 

      Neurogenic shock; syncope

    • E. 

      Compensated shock; decompensated shock

  • 13. 
    A bee sting can trigger a massive release of histamine, which causes ___________ and a(n) _____________ in arterial blood pressure.
    • A. 

      Vasodilation; increase

    • B. 

      Vasodilation; decrease

    • C. 

      Vasoconstriction; oscillation

    • D. 

      Vasoconstriction; increase

    • E. 

      Vasoconstriction; decrease

  • 14. 
    Myocardial infarction can lead to _______________ shock.
    • A. 

      Cardiogenic

    • B. 

      Venous pooling (vascular)

    • C. 

      Hypovolemic

    • D. 

      Obstructed venous return

    • E. 

      Neurogenic

  • 15. 
    The most important force in venous flow is
    • A. 

      The pressure generated by the heart.

    • B. 

      One way flow due to valves.

    • C. 

      The thoracic (respiratory) pump.

    • D. 

      Cardiac suction.

    • E. 

      The skeletal muscle pump.

  • 16. 
    Blood flow to the _______________ remains quite stable even when mean arterial pressure (MAP) fluctuates from 60 to 140 mm Hg.
    • A. 

      Adrenal gland

    • B. 

      Stomach

    • C. 

      Skeletal muscles

    • D. 

      Hypothalamus

    • E. 

      Kidneys

  • 17. 
    The lungs receive a systemic blood supply by way of the
    • A. 

      Pulmonary veins.

    • B. 

      Left pulmonary artery.

    • C. 

      Bronchial arteries.

    • D. 

      Lobar arteries.

    • E. 

      Right pulmonary artery.

  • 18. 
    There are no ________________ in humans.
    • A. 

      Right and left subclavian arteries.

    • B. 

      Right and left brachiocephalic arteries.

    • C. 

      Right and left common carotid arteries.

    • D. 

      Right and left brachiocephalic veins.

    • E. 

      Right and left subclavian veins.

  • 19. 
    The _______________ supplies 80% of the cerebrum.
    • A. 

      Occipital artery

    • B. 

      Anterior cerebral artery

    • C. 

      Superficial temporal artery

    • D. 

      Internal carotid artery

    • E. 

      Middle cerebral artery

  • 20. 
    From superior to inferior, the major branches of the abdominal aorta are
    • A. 

      Celiac truck, superior mesenteric artery, renal arteries, gonadal arteries, inferior mesenteric artery, and common iliac arteries.

    • B. 

      Superior mesenteric artery, inferior mesenteric artery, celiac truck, gonadal arteries, renal arteries, and common iliac arteries.

    • C. 

      Celiac truck, superior mesenteric artery, gonadal arteries, renal arteries, inferior mesenteric artery, and common iliac arteries.

    • D. 

      Superior mesenteric artery, celiac truck, renal arteries, gonadal arteries, inferior mesenteric artery, and common iliac arteries.

    • E. 

      Superior mesenteric artery, celiac truck, gonadal arteries, renal arteries, inferior mesenteric artery, and common iliac arteries.

  • 21. 
    The principal venous drainage of the thoracic organs is accomplished by way of
    • A. 

      The coronary and pulmonary veins.

    • B. 

      Mesenteric circulation.

    • C. 

      The azygos system.

    • D. 

      The branches of the celiac trunk.

    • E. 

      The hepatic portal system.

  • 22. 
    These are all tributaries of the inferior vena cava except
    • A. 

      The internal and external iliac veins.

    • B. 

      The vertebral veins.

    • C. 

      The hepatic veins.

    • D. 

      The lumbar veins.

    • E. 

      The inferior phrenic veins.

  • 23. 
    _____________ are the largest of the lymphatic vessels and they empty into the _______________.
    • A. 

      Collecting ducts; subclavian arteries

    • B. 

      Lymphatic trunks; subclavian arteries

    • C. 

      Lymphatic trunks; collecting ducts

    • D. 

      Lymphatic trunks; subclavian veins

    • E. 

      Collecting ducts; subclavian veins

  • 24. 
    _____________ are found especially in the mucous membrane, standing guard against parasites, and allergens.
    • A. 

      Eosinophils

    • B. 

      Basophils

    • C. 

      Lymphocytes

    • D. 

      Neutrophils

    • E. 

      Monocytes

  • 25. 
    ___________ employ a "respiratory burst" to produce bactericidal chemicals such as hydrogen peroxide (H2O2) and hypochlorite (HClO).
    • A. 

      Suppressor T cells

    • B. 

      Basophils

    • C. 

      Neutrophils

    • D. 

      Natural killer cells

    • E. 

      Cytotoxic T cells

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