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18 Cards in this Set

  • Front
  • Back
Which of the following statements is false

a)most of the total blood volume is contained in veins b)capillaries have a gtr total surface area than any other type of vessel c)exchanges btw blood and tissue fluid occur across the walls of venules d)small arteries and artioles present great resistance to blood flow
c) exchanges btw blood and tissue fluid occur across the walls of venules
All Arteries in the body contain O2 rich blood except

a)the aorta b)the pulmonary artery c)the renal artery d)the coronary artery
b) pulmonary artery
the "lub"or first sound is produced by closing of the

a)aortic semilunar valve b)pulmonary semilunar valve c)tricuspid valve d)bicuspid valve e)both AV valves
e) both AV valves
The first heart sound is produced at the

a)beginning of systole b)end of systole c)begining of diastole d)end of diastole
a) beginning of systole
Changes in the cardic rate primarily reflect change in the duration of

a)systole b)diastole
b) diastole
The QRS wave of an ECG is produced by

a)deploarization of the atria b)repolarization of the atria c)depolarization of the ventricles
d)repolariztion of the ventricles
c) depolarization of the ventricles
The second heart sound directly follows the occurence of the

a)P wave b)QRS wave c)T wave
c) T wave
The cells that normally have the fastest rate of spontaneous diastolic depolarization are located in the

a)SA node b)AV node c)bundle of His d)Purkinje fibers
a) SA node
Whic of these statements is true

a)The heart can produce a graded contraction b)The Heart can produce a sustained contraction c)The action potentials produced at each cardiac cycle normally travel in circus rhythms d)All of the myocardial cells in th eventricles are normally in a refractory period at the same time
d)All of the myocardial cells in the ventricles are normally in a refractory period at the same time
An ischemic injury to the heart that destroys myocardial cells is

a)angina pectoris b) a myocardial infarction c)fibrillation d)heart block
b) a myocardial infarction
The activation of factor X occurs in the

a)intrinsic pathway b)extrinsic pathway c)both A&B d)neither A&B
c)both intrinsic and extrinsic pathways
Platelets

a)form a plug by sticking to each other b)release chemicals that stim vasoconstriction c)provide phospholipids needed for the intrinsic pathway d)a.o.t.a
d) all
Antibodies against both type A and type B antigens are found in the plasma of a person who is

a)Type A b)TypeB c) Type AB d)Type O e) a.o.t.a
d) type O
Production of which of the following blood cells is stimulated by a hormone secreted by the kidneys

a)lymphocytes b)monocytes c)erythrocytes d)neutrophils e)thrombocytes
c) erythrocytes
Which of the following about plasmin is true

a)it's involved in the intrinsic clotting system b)it's involved in the extrinsic clotting system c)it functions in fibrinolysis d)it promotes formation of emboli
c) functions in fibrinolysis
During the phase of isovolumetric relaxation, the pressure in th eventricles is

a)rising b)falling c)first rising then falling d)constant
b) falling
Peristaltic waves of contraction move fluid within which of thesse vessels

a)arteries b)veins c)capillaries d)lymph vessels e)all
d) all
Excessive diarrhea may cause

a)respiratory acidosis b)respiratory alkalosis c)metabolic acidosis d)metabolic alkalosis
c) metabolic acidosis