1. In transmission of the impulses causing the heart to beat, the impulses pass
from the Bundle of HIS to the:
A. Visceral pericardium
B. Purkinje fibers of the ventricles
C. Atrioventricular node of the ventricular septum
D. Nodes of Ranvier
2. Which of
Which of the following is a superficial vein on the medial surface of the arm?
2. The pulse can be felt from any of the following vessels except:
C. dorsal pedal
1. The two _ veins join together to form the superior vena cava.
2. An obstruction in the inferior vena cava would hamper the return of blood from
A. head and neck
B. upper extremities
1. "To allow 2 capillary beds for exchange of materials" is the function of the
A. pulmonary circulation
B. ductus venosum
C. portal circulation
E. right side of the heart
2. At any moment, more than half of the blood in the circulation may be
1. In which circulation do the arteries carry mainly oxygenated blood?
A. pulmonary circulation of adults
B. systemic circulation of adults
C. fetal circulation
D. none of the above
2. Assuming that a thrombus was formed in the femoral vein, it would
1. Indicate the answer which does not belong with the others in this list.
A. Tricuspid valve
B. Mitral valve
C. Bicuspid valve
D. Left AV valve
E. Left atrioventricular valve.
2. Heart valves maintain the - ?- of cardiac blood flow.
1. The posterior surface of the heart is mostly formed by the:
A. Right ventricle
B. Left ventricle
C. Right atrium
D. Left atrium
E. Left auricle
2. The first mixing of venous-type blood with arterial-type blood occurs in the fetal
circulation where the:
1. After several hours of standing at attention on a hot sunny day, Several army
recruits fainted. Compared to normal resting values, measurements taken on the
recruits just before they collapsed would have indicated:
A. Decreased venous return
1. Cardiac output is increased during exercise because of:
A. Increased peripheral resistance in vessels supplying skeletal muscles
B. Increased heart rate and stroke volume
C. Both A and B
D. Neither A nor B
2. The most important job of the heart is to:
1. The most inclusive means by which substances pass into and of capillaries is:
A. endocytosis and exocytosis.
B. osmotic pressure.
C. fluid pressure.
D. fluid movement.
2. In the condition called "circulatory shock", reduced blood volume "
1. In inflammation, both ? leave the capillaries to promote edema.
A. red and white blood cells
B. plasma proteins and leukocytes
C. water and proteins
D. phagocytes and tissue fluid
2. A red marrow biopsy is ordered for two patients - one a child and the
1 . Antigen-antibody reactions involving red blood cells:
A. are commonly called agglutination reactions
B. always lead to clumping of red blood cells
C. often lead to hemolysis of RBC's
D. all of the above
2 A detached moving blood clot is clinically ter
1. Which of these does not trigger erythropoietin formation?
A. Decreased tissue demands for oxygen
B. Declining number of RBC's
C. Increased metabolic rate
D. Rapid consumption of oxygen by active cells
2 Of the following, the most dangerous kind of tran
1. Reticulocytes are nucleated immature cells that develop into mature:
2. Circulating leukocytes represent a small fraction of the total population, since
most WBCs are found in peripheral tiss
1. Prothrombinase catalyzes the conversion of :
A. Platelet extract to thromboplastin
B. Vitamin K to prothrombin
C. Prothrombin to thrombin
D. Fibrin to fibrinogen
E. Bile to calcium ions
2.In clotting, _?_ becomes the insoluble threads of the clot, that
1. Blood plasma is the:
A. Extracellular fluid of blood.
B. Endothelium of capillary walls
C. Same as lymph but red in color
D. Same as interstitial fluid
E. Intracellular fluid of blood
2. Which of the following can carry oxygen?