A&P2 Chapter 19
If agglutinogen B meets with agglutinin anti-A, what is the result?
No agglutination occurs.
In which pregnancy are an Rh-positive mom and an Rh-positive child at risk of developing erythroblastosis fetalis?
No pregnancy
In which pregnancy are an Rh-positive mom and an Rh-positive child at risk of developing erythroblastosis fetalis? All pregnancies First pregnancy Second or later pregnancies No pregnancy
No pregnancy
Where are red blood cells produced in an adult?
Red bone marrow
Red blood cells have a limited lifespan and then are phagocytized by macrophages in the liver, spleen and red bone marrow. What happens to the iron in the heme group of RBCs?
The iron will be either stored in the liver or transported back to the red bone marrow to be incorporated into new hemoglobin.
What is hematocrit (Hct)?
The percentage of formed elements in whole blood.
The primary function of a mature red blood cell is which of the following?
Transport of respiratory gases
Which blood type can safely be transfused into a person with type O blood?
Type O
What type of blood is considered to be the "universal donor"?
Type O negative
During RBC recycling, each heme unit is stripped of its iron and converted to __________.
biliverdin
What is jaundice?
A yellowing of the skin and eyes
a person with A antigen but without Rh antigen.
A-negative
If a person has type A blood, Rh surface antigens on the blood cells, and anti-B antibodies in the plasma, what is that person's blood type?
A-positive
Why is there a difference in the hematocrit between males and females?
Androgens stimulate red blood cell production and estrogens do not.
a person with B antigen but without Rh antigen.
B-negative
What of the following types of blood would cause a cross-reaction when given to a person with type A-positive blood?
B-positive
a person with B and Rh antigens.
B-positive
What is the primary site of erythropoiesis in an adult?
Bone marrow
Which of the following is NOT a surface antigen that is used in determining blood type? C A B Rh
C
What is the specific term for the production of red blood cells?
Erythropoiesis
What type of molecules are the antigens found on our blood cells?
Glycoproteins and glycolipids
Which of the following is NOT a benefit of the unusual shape of the red blood cell? Greater hemoglobin carrying capacity Increased surface-to-volume ratio Red blood cells can stack up on each other. They are flexible.
Greater hemoglobin carrying capacity
Agglutinogens are contained on the __________, whereas the agglutinins are found in the __________.
cell membrane of the RBC; plasma
Signs of iron-deficiency anemia include __________.
decrease in hematocrit, hemoglobin content, and O2-carrying capacity
Reticulocytes are nucleated immature cells that develop into mature __________.
erythrocytes
Which part of hemoglobin binds oxygen?
heme
Jessica has just moved from Orlando, Florida, to Denver, Colorado. What condition is she now experiencing that is stimulating the production of erythropoietin and, consequently, more red blood cells?
hypoxia caused by an increase in her elevation above sea level
Erythropoietin appears in the plasma when peripheral tissues, especially the kidneys, are exposed to __________.
low oxygen concentrations
Circulating mature RBCs lack __________.
mitochondria, ribosomes, nuclei
Protein synthesis in a mature RBC occurs primarily __________.
nowhere; mature red blood cells cannot synthesize proteins
Circulating mature RBCs lack __________.
ribosomes, mitochondria and nuclei