Chapter 12 Homework

Front 1

Which of the following does not describe the location of the heart?

Back 1

Posterior to the vertebral column

Does:

- Posterior to the sternum

- In the thoracic cavity

- Between the lungs

Front 2

What is the name given to the pointed end of the heart?

Back 2

Apex

Front 3

What is the name of the loose-fitting sac that encloses the heart?

Back 3

Pericardium

Front 4

What is another name for the epicardium?

Back 4

Visceral pericardium

Front 5

All of the following are characteristics of the myocardium except:

Back 5

Forms the valves of the heart

- Provides the force needed to eject blood from the heart

- Forms the bulk of the heart wall

- Composed of cardiac muscle tissue

Front 6

Which of the following heart chambers receives deoxygenated blood from the body?

Back 6

Right atrium

Front 7

The superior vena cava returns blood to the heart from the:

Back 7

Head

Front 8

What is the partition that separates the right and left atria?

Back 8

Interatrial septum

Front 9

What is the name of the valve located between the right atrium and right ventricle?

Back 9

Triscuspid valve

Front 10

What is the name of the valve located in the right ventricle at the base of the pulmonary trunk?

Back 10

Pulmonary semilunar valve

Front 11

What are the names of the two arteries that branch off the aorta to supply the heart with oxygen andnutrients?

Back 11

Coronary arteries

Front 12

All of the following are characteristics of the sinoatrial node except:

Back 12

Initiates an impulse 4 to 5 times per minute

- Located in the right atrium

- Known as the “pacemaker” of the heart

- Initiates impulses without neural stimulation

Front 13

Why is the heart’s impulse delayed at the atrioventricular node?

Back 13

Gives the atria time to finish contracting

Front 14

What is the correct pathway that the impulse takes through the ventricles?

Back 14

Atrioventricular (AV) bundle, bundle branches, conduction myofibrils

Front 15

One complete heartbeat is known as a/an:

Back 15

Cardiac cycle

Front 16

Which of the following occurs when the ventricles are contracting?

Back 16

Atria are relaxed

Front 17

What causes the “lubb” heart sound?

Back 17

Closing of the atrioventricular valves

Front 18

Heart murmurs are caused by:

Back 18

Faulty heart valves

Front 19

How much blood is in the body of an adult male?

Back 19

5 to 6 liters

Front 20

All of the following are functions of the blood except:

Back 20

Regulates body metabolism

- Regulates body temperature

- Carries oxygen and nutrients to cells

- Carries hormones from endocrine glands to target tissues

Front 21

What percentage of the blood is made up of plasma?

Back 21

55%

Front 22

What makes up the buffy coat?

Back 22

White blood cells and platelets

Front 23

All of the following are plasma proteins except:

Back 23

Urea

- Albumins

- Globulins

- Fibrinogen

Front 24

Which of the following are transported by the blood?

Back 24

All

- Fatty acids

- Amino acids

- Glucose

- Carbon dioxide

Front 25

All of the following are characteristics of erythrocytes except:

Back 25

Engulfs bacteria by phagocytosis

- Lack a nucleus

- Produced in red bone marrow

- Biconcave disk shape

Front 26

What is the name of the stem cell from which blood cells develop?

Back 26

Hemocytoblast

Front 27

What is the normal red blood cell count for an adult female?

Back 27

4 to 5.5 million

Front 28

Which of the following is an immature erythrocyte?

Back 28

Reticulocyte

Front 29

What is the color of oxyhemoglobin?

Back 29

Bright red

Front 30

What is the function of erythropoietin?

Back 30

Stimulates erythrocyte production

Front 31

Which of the following is necessary for red blood cell production?

Back 31

All:

- Iron

- Folic acid

- Vitamin B-12

Front 32

What is necessary for the absorption of vitamin B12 from the intestines?

Back 32

Intrinsic factor

Front 33

What condition is caused by a lack of vitamin B12 in the body?

Back 33

Pernicious anemia

Front 34

What is the lifespan of a red blood cell?

Back 34

120 days

Front 35

What is the name of the yellow pigment that results from the breakdown of hemoglobin?

Back 35

Bilirubin

Front 36

What is the function of leukocytes?

Back 36

Defend the body against disease

Front 37

The movement of leukocytes through a capillary wall and into the tissues is known as:

Back 37

Diapedesis

Front 38

What is an immature form of a neutrophil?

Back 38

Band

Front 39

Which of the following causes an increase in the number of neutrophils?

Back 39

Acute infections

Front 40

Thrombocytes are also known as:

Back 40

Platelets

Front 41

All of the following are characteristics of thrombocytes except:

Back 41

They engulf bacteria and clean up cellular debris

- They close breaks in blood vessels

- Normal range is 150,000 to 500,000

- They initiate the formation of blood clots

Front 42

Thrombocytes develop from large cells known as:

Back 42

Megakaryocytes

Front 43

What is the term for the stoppage of bleeding?

Back 43

Hemostasis

Front 44

Which of the following is the first response of the body to a blood vessel injury?

Back 44

The blood vessel constricts

Front 45

Which of the following converts fibrinogen to fibrin?

Back 45

Thrombin

Front 46

All of the following are characteristics of fibrin except:

Back 46

Forms fibrous connective tissue

- Adheres to damaged tissue

- Forms fibrous connective tissue

- Traps blood cells and platelets

Front 47

What antigens are present in an individual with type AB- blood?

Back 47

A and B antigens

Front 48

What antibodies are present in an individual with type A+ blood?

Back 48

B antibodies

Front 49

Microscopic arteries are known as:

Back 49

Arterioles

Front 50

The tunica media of an arterial wall consists of:

Back 50

Smooth muscle

Front 51

Which of the following carries blood toward the heart?

Back 51

Veins

Front 52

Which of the following is part of the pulmonary circuit?

Back 52

Oxygen is picked up in the lungs

Front 53

F

Back 53

F