Lecture Exam 1

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Question #1

How many globins (protein building blocks) are found in a single hemoglobin molecule?

A 6

B 8

C 2

D 1

E 4

Question #2

Fibrinolysis involves ________ of the fibrin framework, and it involves the protein _______.

A destruction,plasmin

B construction,plasmin

C construction,actinomyosin

D destruction, thrombokinase

E construction,thrombokinase

Question #3

Vascular spasms last

A a few millisecondswhen tissue damage is moderate.

B several minuteswhen tissue damage is extensive.

C almost a fullminute when tissue damage is extensive.

D several hours whentissue damage is moderate.

Question #4

Which are characteristic of type A blood?
a: Has anti-A antibodies
b: Has anti-B antibodies
c: Has surface antigen A on its erythrocytes
d: Has surface antigen B on its erythrocytes
e: Has neither surface antigen A nor B on its erythrocytes
f: Will agglutinate with blood type B

A a, d, f

B b, c, d, f

C b, c, f

D a, c, f

E a, c, d, f

Question #5

The globulins make up about ________ percent of all plasma proteins.

A 58

B 1

C 4

D 37

E 85

Question #6

Prostacyclin is an eicosanoid that acts as a

A plateletattractant.

B plateletrepellant.

Question #7

Which leukocytes are derived from the myeloid line?

A Neutrophils, basophils, eosinophils, and monocytes

B Basophils and eosinophils

C Lymphocytes

D Lymphocytes and monocytes

E Neutrophils

Question #8

Sodium, calcium, andbicarbonate are all described as plasma

A formed elements.

B nutrients.

C proteins.

D solvents.

E electrolytes.

Question #9

The antigen-antibody reaction is an example of the regulation function of blood.

A FALSE

B TRUE

Question #10

If agglutination occurs after a blood transfusion, it may indicate

A the donor had typeO blood.

B the recipient hadtype AB blood.

C the wrong bloodtype was used.

D there were noagglutinins (antibodies) in the recipient blood.

Question #11

A comparison of the clinical hematocrit and true hematocrit would indicate that

A their values arevery similar.

B the truehematocrit is much larger.

C the clinicalhematocrit is much larger.

Question #12

During platelet plug formation, platelets begin to stick to

A collagen with theassistance of von Willebrand factor.

B proconvertin with the assistance offactor IX.

C prostacyclin withthe assistance of activated factor V.

D collagen with theassistance of prothrombin.

E prostacyclin withthe assistance of thromboxane A2.

Question #13

Which are the most numerous of the leukocytes?

A Basophils

B Neutrophils

C Monocytes

D Lymphocytes

E Eosinophils

Question #14

The type of leukocyte that will migrate in the blood and take up residence in the tissues as a macrophage is a(n)

A lymphocyte.

B basophil.

C eosinophil.

D neutrophil.

E monocyte.

Question #15

Which type of leukocyte releases histamine?

A Monocyte

B Basophil

C Eosinophil

D Lymphocyte

E Neutrophil

Question #16

For a relatively small injury, a platelet plug is formed within 1 minute.

A FALSE

B TRUE

Question #17

Iron, lactic acid, and lipids are all considered to be nutrients in blood plasma.

A FALSE

B TRUE

Question #18

When blood is centrifuged and its components separate, the bottom of the tube holds the

A electrolytes andwaste products.

B plasma.

C erythrocytes.

D platelets.

E buffy coat.

F monocytes.

Question #19

Which term best describes the function of blood when considering the presence of carbon dioxide and endocrine hormones?

A Protection

B Transportation

C Regulation

D Prevention

Question #20

Which are characteristic of leukocytes?
a: Smaller than erythrocytes
b: Have a nucleus
c: Have no hemoglobin
d: More numerous than erythrocytes
e: Depending on type, may or may not contain granules

A b, c, e

B b, c, d, e

C a, b, c, d

D a, b, c, d, e

E a, b, e

Question #21

The smallest and most abundant plasma proteins are the

A fibrinogens.

B globulins.

C albumins.

D prothrombins.

E endocrinehormones.

Question #22

Which term best describes the function of blood when considering the presence of leukocytes and antibodies?

A Prevention

B Regulation

C Protection

D Transportation

Question #23

Erythrocytes exhibit a limited lifespan due to their inability to synthesize the proteins necessary to repair themselves.

A TRUE

B FALSE

Question #24

Which depicts the order of cell formation in erythropoiesis?
a: Proerythroblast
b: Normoblast
c: Myeloid stem cell
d: Reticulocyte
e: Erythroblast
f: Mature erythrocyte

A a, b, c, e, d, f

B c, b, a, d, e, f

C c, a, b, e, d, f

D c, a, e, b, d, f

E a, c, d, b, e, f

Question #25

How many oxygen molecules may bind to a single molecule of hemoglobin?

A 16

B 4

C 6

D 2

E 8

Question #26

Myofibrils within cardiac muscle cells are aligned in sarcomeres.

A FALSE

B TRUE

Question #27

The papillary muscles attach to the cusps of the atrioventricular valves by means of the

A tricuspidvalve.

B trabeculaecarneae.

C conusarteriosus.

D tendinous cords.

E pectinatemuscles.

Question #28

Which are functions performed by the fibrous skeleton of the heart?
a: Separates the atria and ventricles
b: Anchors the heart valves
c: Provides electrical insulation between the atria and ventricles
d: Provides the framework for the attachment of the myocardium
e: None of these are true functions of the fibrous skeleton of the heart

A e

B a, c, d

C a, d

D b, d

E a, b, c, d

Question #29

During a cardiac cycle, how many of the four chambers contract at any one time?

A None of the choices is correct.

B Highly variable, depending on the heart beat rate

C 2

D 1

E 4

Question #30

All of the heart’s sulci house blood vessels that supply the myocardium.

A TRUE

B FALSE

Question #31

What are the cell-to-cell contacts of the cardiac muscle fibers called?

A Sarcoplasmic reticulum

B T-tubules

C Z discs

D Cardiac discs

E Intercalateddiscs

Question #32

Arteries carry blood toward the heart, while veins carry blood away from the heart.

A TRUE

B FALSE

Question #33

About 70% of the ventricle filling is achieved passively without the contraction of the atria.

A TRUE

B FALSE

Question #34

The receiving chambers of the heart are the atria, and the forcefully pumping chambers of the heart are the ventricles.

A FALSE

B TRUE

Question #35

Which are differences between cardiac muscle tissue and skeletal muscle tissue?
a: The sarcoplasmic reticulum in cardiac muscle is less extensive.
b: The sarcoplasmic reticulum in cardiac muscle is more organized.
c: Cardiac muscle has intercalated discs; skeletal muscle does not.
d: Cardiac muscle has 1 or 2 nuclei per cell; skeletal muscle has multiple nuclei per cell.
e: Cardiac muscle has more well-defined terminal cisternae.

A a, b, e

B a, c, d

C b, d, e

D b, c, e

E a, c, e

Question #36

The pulmonary trunk receives blood from the right ventricle and conducts it toward the lung. The pulmonary trunk is a(n)

A capillary.

B artery.

C vein.

Question #37

Someone with a heart block would have

A a short T-Pinterval.

B a long P-Rinterval.

C a long T-Pinterval.

D a short P-Rinterval.

Question #38

As blood is pumped out of the heart and into the major arteries leaving the heart, it

A fills the cusps ofthe semilunar valves, causing them to expand and block the backflow ofblood

B pushes against thesemilunar valves and opens them.

C pushes against theatrioventricular valves and opens them.

D pushes against thesemilunar valves and closes them.

E fills the cusps ofthe atrioventricular valve causing opening of the bicuspid and closure of thetricuspid.

Question #39

Which heart chambers containdeoxygenated blood?

A Left atrium and left ventricle

B Right atrium and right ventricle

C Right atrium and left ventricle

D Left atrium and right atrium

E Left ventricle and right ventricle

Question #40

The internal wall surface of each ventricle displays large, smooth, irregular muscular ridges called

A conusarteriosus.

B pectinatemuscles.

C tendinous cords.

D trabeculaecarneae.

E atrioventricularopening.

Question #41

During ventricular contraction, the semilunar valves close in order to permit the blood to enter the large arterial trunks that carry blood away from the heart.

A FALSE

B TRUE

Question #42

Which correctly describes the heart’s apex?

A Projects slightly anteroinferiorly toward the left side of the body

B Projects slightly posteroinferiorly toward the right side of the body

C Projects slightly anteroinferiorly toward the right side of the body

D Projects slightly posteroinferiorly toward the left side of the body

E Projects slightly posteroinferiorly toward the midline of the body

Question #43

The units for perfusion of blood are typically

A beats per minute per gram.

B millimiters perhour per kilogram.

C liters pergram.

D grams perminute.

E milliliters perminute per gram.

Question #44

The plateau phase of an action potential

A occurs only inskeletal muscle and makes those fibers’contractions most forceful.

B leads to tetaniccontractions in smooth and skeletal muscle.

C allows cardiacmuscle cells to contract and then relax without locking up.

D allows cardiacmuscle cells to exhibit synchronous fibrillation.

Question #45

Blood moves into and then out of a heart chamber because

A All of the choicesare correct.

B the veins andarteries constrict and dilate to propel and attract blood.

C it is underconstant pressure, but its movement is dictated by the control of valveopenings and closures.

D it moves along itspressure gradient, and that gradient depends on contraction and relaxationduring the cardiac cycle.

Question #46

To initiate a cardiac muscle cell contraction, calcium

A binds to theZ-disc.

B binds tocalmodulin.

C binds toactin.

D binds totroponin.

E binds to tropomyosin.

Question #47

What is the sequence of events in the transmission of an impulse through the heart muscle?
a: AV node
b: AV bundle
c: SA node
d: Through the atria
e: Through the ventricles
f: Bundle branches
g: Purkinje fibers

A c, d, a, b, f, g, e

B c, d, a, f, b, g, e

C b, a, d, c, f, g, e

D d, b, a, c, f, g, e

E f, g, d, c, b, a, e

Question #48

The opening and closing of theheart valves is caused by

A action potentialswithin the cusps of the valves.

B contraction andrelaxation of papillary muscles that pull on heart strings.

C contraction of thesmooth muscle in the walls of the great vessels leaving the heart.

D pressure changes ofalternating contraction and relaxation during the cardiac cycle.

Question #49

The heart valves

A are only used inthe fetal heart.

B separate the rightand left sides of the heart.

C stabilize and holdthe arteries leaving the heart.

D direct theconduction impulse through the heart muscle.

E permit the passageof blood in one direction.

Question #50

Which circuit of the cardiovascular system is responsible for sending blood to the kidneys, stomach, and pelvic regions?

A Coronary circuit

B Systemic circuit

C Visceral circuit

D Pulmonary circuit

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