17.4-17.11

Which of the following is incorrect about hemoglobin? It is associated with the transport of respiratory gases. It has a complex quaternary structure. Normally, each red blood cell contains about 280 million molecules of hemoglobin molecules. It is a plasma protein.

It is a plasma protein.

________ are immature erythrocytes that are present in the circulation. Erythroblasts Band cells Reticulocytes Myeloblasts Normoblasts

Reticulocytes

How would removal of calcium ions from a blood sample affect coagulation? Coagulation would be prevented. There would be no important effect because magnesium can substitute for calcium. The coagulation pathway would be lacking a required cofactor at many steps and coagulation would be prevented. The coagulation pathway would be lacking a required cofactor at many steps and no important effect because magnesium can substitute for calcium. The coagulation pathway would be lacking a required cofactor at many steps.

The coagulation pathway would be lacking a required cofactor at many steps and coagulation would be prevented.

White blood cells that release histamine at the site of an injury are lymphocytes. neutrophils. basophils. monocytes. eosinophils.

basophils

Within macrophages in the spleen, liver, and bone marrow, each heme unit is stripped of its iron and is first converted to which of the following organic compounds? stercobilin bilirubin biliverdin urobilin

biliverdin

Which of these descriptions best matches the term lymphocytes? kill bacteria using cytotoxic chemicals release histamine defend against specific pathogens or toxins become macrophages often elevated in allergic individuals

defend against specific pathogens or toxins

The ________ is a procedure that is used to determine the number of each of the various types of white blood cells. hematocrit mean corpuscular volume reticulocyte count complete blood count differential count

differential count

Tissue factor (Factor III) is a factor in the ________ pathway. extrinsic common retraction fibrinolytic intrinsic

extrinsic

Each hemoglobin molecule contains four iron atoms. one alpha and one beta chain. four alpha chains. one heme group. None of the answers is correct.

four iron atoms.

What term is associated with elevated values of mean corpuscular hemoglobin concentrations (MCH)? polycythemia reticulocytosis macrocytic hyperchromic

hyperchromic

RBCs typically live about 120 days. The main reason for this short lifespan in RBCs is their flexibility. concentration of Hb. lack of nucleus. cell shape. large surface area-to-volume ratio.

lack of nucleus

A cancer of the white blood cells is called leukemia. leukocytosis. hemophilia. pernicious anemia. jaundice.

leukemia

If bile ducts are blocked, bilirubin appears in the skin and eyes. more hemolysis takes place. more bilirubin appears in the plasma. more bilirubin appears in the plasma, and bilirubin appears in the skin and eyes. All of the answers are correct.

more bilirubin appears in the plasma, and bilirubin appears in the skin and eyes.

The most numerous white blood cells in peripheral circulation are the eosinophils. neutrophils. monocytes. basophils. lymphocytes.

neutrophils.

The enzyme that can digest fibrin and dissolve a clot is plasmin. phosphokinase. fibrinase. heparin. thrombin.

plasmin

Sensitization during hemolytic disease of the newborn refers to spontaneous miscarriage of a woman's first baby due to blood incompatibilities. the fetal immune system producing antibodies against the mother's RBCs. the mother's immune system producing antibodies against the mother's RBCs. the fetal immune system producing antibodies against the fetus' RBCs. the mother's immune system producing antibodies against the fetus' RBCs.

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

People with type AB blood are considered the "universal recipient" for transfusions because they usually have very strong immune systems. they are usually Rh negative. their blood cells lack A and B antigens. their blood is plentiful in A and B antibodies. their blood lacks A or B antibodies.

their blood lacks A or B antibodies.

The conversion of fibrinogen to fibrin is catalyzed by thrombin. prothrombin activator. plasmin. fibrinogen-converting enzyme. factor VIII.

thrombin

Choose the correct statement regarding hemolytic disease of the newborn (HDN). A newborn with severe HDN has a low concentration of circulating bilirubin. Unlike anti-A and anti-B antibodies, anti-Rh antibodies are able to cross the placenta and enter the fetal bloodstream. In the second pregnancy of an Rh- mother with an Rh+ fetus, the fetal demand for blood cells decreases precipitously. After delivery, the infant's entire blood volume may require replacement to remove the fetal anti-Rh antibodies.

Unlike anti-A and anti-B antibodies, anti-Rh antibodies are able to cross the placenta and enter the fetal bloodstream.