MasteringA&P Ch 17

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A typical adult hematocrit is around

45

Formed elements make up about what percentage of blood?

45 %

Type O+ blood cannot be given to a type _______ recipient.

O-

Which of the following statements concerning red blood cells is false?

Red cells are about 18 µm in diameter.

________ are immature erythrocytes that are present in the circulation.

Reticulocytes

________ involves a cascade of reactions leading to the conversion of fibrinogen to fibrin.

Coagulation

The most abundant proteins in blood plasma are

albumins

Hemolytic disease of the newborn may result if

an Rh-negative mother carries an Rh-positive fetus.

A person with Type A blood has

antigen A on the RBCs and anti-B antibodies in the plasma

Which of the following is not a phagocytic cell?

basophil

Platelets are

cytoplasmic fragments of large cells.

Platelets function in all of the following except

dissolving a formed clot.

The level of erythropoietin in the blood would rise due to all of the following except

during periods of fasting.

Red blood cell production is regulated by the hormone

erythropoietin

A plasma protein essential for blood coagulation is

fibrinogen.

A hematocrit provides information on

formed elements abundance

The waste product bilirubin is produced from

heme molecules lacking iron

More than 95 percent of the protein in a red blood cell is

hemoglobin

Which of the following descriptions best matches the term colony stimulating factor?

hormone that regulates blood cell formation

Plasma proteins essential in body defense are the

immunoglobulins

Plasma is closest in composition to

interstitial fluid.

Each heme ring in hemoglobin encloses an atom of

iron

RBCs typically live about 120 days. The main reason for this short lifespan in RBCs is their

lack of nucleus.

Megakaryocytes are precursors for which formed elements of blood?

platelets

Which of the following is not a component of plasma?

platelets

An elevated hematocrit value is termed

polycythemia.

A person's blood type is determined largely by the

presence of specific glycoproteins on the cell membrane.

Most of the iron that is removed from degraded hemoglobin is

recycled to the red bone marrow.

In adults, the only site of red blood cell production, and the primary site of white blood cell formation, is

red bone marrow

The normal pH of blood is

slightly alkaline.

Sensitization during hemolytic disease of the newborn refers to

the mother's immune system producing antibodies against the fetus' RBCs

People with type AB blood are considered the "universal recipient" for transfusions because

their blood lacks A or B antibodies.

If the blood types of a donor and recipient are compatible, then

there is no reaction between antibodies and antigens.

The conversion of fibrinogen to fibrin is catalyzed by

thrombin.

Which of the following is a function of the blood?

transport of gases, defense against toxins and pathogens, transport of body heat, transport of nutrients and wastes

Bilirubin is:

transported to the liver for excretion in the bile.

The combination of plasma and formed elements is called.

whole blood.

________ transport(s) oxygen and CO2 in the RBCs.

Hemoglobin molecules

How does a treatment with RhoGAM prevent hemolytic disease of the newborn (HDN)?

It destroys fetal RBCs that enter the maternal circulation.

When a person who lives at sea level vacations in the Rocky Mountains, you would expect

a drop in oxygen levels, the release of erythropoietin, a rise in hematocrit.

Which of the following is false concerning monocytes?

about same size as basophils

The most numerous white blood cells in peripheral circulation are the

neutrophils.

Which of the following descriptions best matches the term eosinophils?

often elevated in allergic individuals


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