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Earlham High School Anatomy Class

Cardiovascular System

#1 The main organ of the cardiovascular system is the:

A: Lungs

B:

Heart

C: Liver

D:

Your mom!

B: Heart

#2 Which of the following structures consists of self-exciting tissue?

A: chordae tendineae

B:

papillary muscles

C: sinoatrial node

D:

atrial syncytium

C: sinoatrial node

#3 Platelets are best defined as

A: Giant, multinucleated

B:

Cytoplasmic fragments of cells

D:

Lymphoid cells

cells

C: Immature leukocytes

B: cytoplasmic fragments of cells

#4 The tissue that forms a loose-fitting sac Around the heart is the

A: pericardium

B:

epicardium

C: endocardium

D:

exocardium

A: pericardium

#5 Nonprotein nitrogenous substances include

A: Amino acids

B:

Urea

C: Uric acid

D:

All of the above

D: All of the above

#6 Of the following, the one that is not a type of plasma protein:

A: Heparins

B:

Fibrinogens

C: Albumins

D:

Globulins

A: Heparins

#7 Of the following, the one that is not a factor that influences blood pressure:

A: Blood volume

B:

Viscosity

C: Digestive rate

D:

Stroke volume

C: Digestive rate

#8 A normal white blood cell count (WBCC) is between

A: 500-1000/mm3 of blood

B:

5000-10,000/mm3 of blood

C: 50,000-100,000/mm3 of

D:

15,000-25,000/mm3 of blood

blood

B: 500010,000/mm3 of blood

#9 The basic event in the formation of a blood clot is the change of

A: Fibrinogen to fibrin

B:

Fibrin to fibrinogen

C: Thrombin to

D:

Vitamin K to prothrombin

prothrombin

A: Fibrinogen to fibrin

#10 The most important action of plasma albumin is

A: Acting as antibodies of

B:

Helping to control bleeding

D:

Helping to maintain blood osmotic pressure

immunity

C: Serving as energy sources

D: Helping to maintain blood osmotic pressure

#11 When the ventricular walls contract, the

Bicuspid valve opens

A: and the tricuspid valve

B:

closes

C: Bicuspid and tricuspid valves close

D:

Tricuspid valve opens and the bicuspid valve closes

Bicuspid and tricuspid valves open

C: Bicuspid and tricuspid valves close

#12 The most active phagocytic cells among the leukocytes are

A: Basophils and

B:

Neutrophils and monocytes

D:

Monocytes and lymphocytes

eosinophils

C: Lymphocytes and neutrophils

B: Neutrophils and monocytes

#13 The density of capillaries within a tissue varies directly with the tissue’s

A: Thickness

B:

Fluid content

C: Type of matrix

D:

Rate of metabolism

D: Rate of metabolism

#14 In an ECG pattern, the T wave is caused by

A: Polarization of atrial muscle fibers

C: Depolarization of atrial muscle fibers

B:

Polarization of ventricular muscle fibers

Depolarization of

D: ventricular muscle fibers

B: Polarization of ventricular muscle fibers

#15 In an ECG pattern, the P wave is caused by

A: Polarization of atrial

B:

Polarization of ventricular muscle fibers

D:

Depolarization of ventricular muscle fibers

muscle fibers

C: Depolarization of atrial muscle fibers

C: Depolarization of atrial muscle fibers

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