Biology Forums - Study Force

Select the description below that describes pulmonary circulation.
 
  A.
  System of blood vessels that carries blood from the heart to the lungs and back to the right atrium of the heart.
 
  B.
  System of blood vessels that a carries blood from the heart to the rest of the body.
 
  C.
  Finely dissected blood vessels that allow for the exchange of nutrients in the tissues.
 
  D.
  System of blood vessels that carries blood from the heart to the lungs and back to the left atrium of the heart.

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(Question 2) Hardening of the arteries results in _______ and deposition of plaques in the walls of the arteries results in ______.
 
  A.
  atherosclerosis; arteriosclerosis
 
  B.
  atherosclerosis; phlebitis
 
  C.
  phlebitis; atherosclerosis
 
  D.
  phlebitis; arteriosclerosis
 
  E.
  arteriosclerosis; atherosclerosis

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(Question 3) What are vasa vasorum?
 
  A.
  Blood vessels that connect primary and secondary capillary networks.
 
  B.
  Structures within veins that keep blood flowing in one direction.
 
  C.
  Connective tissue that surrounds large vessels.
 
  D.
  Nerve plexuses surrounding the blood vessel.
 
  E.
  Blood vessels that nourish the tunica adventitia and tunica media.

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(Question 4) Vasoconstriction is caused by ______ stimulation of vascular smooth muscle; ______ stimulation of vascular smooth muscle causes vasodilation.
 
  A.
  decreased; increased
 
  B.
  parasympathetic; sympathetic
 
  C.
  sympathetic; increased
 
  D.
  parasympathetic; decreased
 
  E.
  sympathetic; parasympathetic

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(Question 5) Fill in the missing blood vessel. vertebral artery; _____________; posterior cerebral artery
 
  Fill in the blank(s) with the appropriate word(s).

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(Question 6) During exchange at the capillaries, what can cross the endothelial cells, diffusing through the plasma membranes?
 
  A.
  Proteins
 
  B.
  Large water-soluble substances
 
  C.
  Hormones
 
  D.
  Red blood cells
 
  E.
  Lipid-soluble substances

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(Question 7) The largest fenestrae are seen in _____ capillaries while the smallest fenestrae are seen in ____ capillaries.
 
  A.
  fenestrated; sinusoidal
 
  B.
  continuous; sinusoidal
 
  C.
  continuous; fenestrated
 
  D.
  sinusoidal; continuous
 
  E.
  sinusoidal; fenestrated

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(Question 8) Select the answer that is not true when comparing veins and arteries of the same diameter.
 
  A.
  Veins have thinner walls.
 
  B.
  Veins have valves.
 
  C.
  Veins have fewer smooth muscle fibers.
 
  D.
  Veins have a larger lumen.
 
  E.
  Veins have more elastic tissue.

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(Question 9) All of the following are functions of the circulatory system, except
 
  A.
  carries blood.
 
  B.
  regulates blood pressure.
 
  C.
  transports nutrients.
 
  D.
  directs blood flow to tissues.
 
  E.
  excretes wastes.

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(Question 10) Fill in the missing blood vessel. aortic arch; _____________; left axillary artery
 
  Fill in the blank(s) with the appropriate word(s).

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