What type of gene expression occurs when a person has type AB blood?
Select one:
a. homozygous dominant
b. homozygous recessive
c. incomplete dominance
d. codominance ANS: d. codominance
Neutrophils of the blood are derived from a population of stem cells called
Select one:
a. lymphoblasts.
b. proerythroblasts.
c. myeloblasts.
d. megakaryoblasts.
e. monoblasts. ANS: c. myeloblasts.
Plasma is ____ while formed elements are ____.
Select one:
a. a blood gas; blood clots
b. the liquid portion of blood; the cells
c. lacking in protein; regulators of blood osmolality
d. the cellular portion of blood; acellular components
e. mostly protein; the matrix ANS: b. the liquid portion of blood; the cells
Macrophages are derived from
,Select one:
a. neutrophils.
b. lymphocytes.
c. monocytes.
d. basophils.
e. eosinophils. ANS: c. monocytes.
When the antigens on erythrocytes bind with antibodies in the plasma,
Select one:
a. agglutination of erythrocytes occurs.
b. hemolysis of leukocytes may occur.
c. the antibodies dissolve.
d. the blood group changes.
e. coagulation occurs. ANS: a. agglutination of erythrocytes occurs.
When a blood vessel is damaged, which of the following events occurs last?
Select one:
a. Collagen is exposed.
b. Platelets adhere to collagen.
c. Platelets are activated.
d. Platelets begin to stick to each other and form a plug.
e. von Willebrand factor is produced. ANS: d. Platelets begin to stick to each other and form a plug.
In which of the following situations might Rh incompatibility develop?
Select one:
,a. Mother is Rh negative; fetus is Rh negative
b. Mother is Rh positive; father is Rh positive
c. Mother is Rh negative; fetus is Rh positive
d. Mother is Rh positive; fetus is Rh negative
e. Mother is Rh positive; fetus is Rh positive ANS: c. Mother is Rh negative; fetus is Rh positive
A person with type B blood
Select one:
a. has antigen A.
b. has anti-A antibodies .
c. will have a transfusion reaction if given type B blood.
d. has anti-B antibodies.
e. can receive type A blood. ANS: b. has anti-A antibodies .
During platelet plug formation,
Select one:
a. platelets stick to the exposed collagen fibers of injured vessels.
b. activated platelets release fibrinogen.
c. thrombin is released from endothelial cells.
d. vitamin K production increases.
e. platelets multiply. ANS: a. platelets stick to the exposed collagen fibers of injured vessels.
All of the following describe ways that blood helps maintain homeostasis, except
Select one:
, a. stabilizing body fluids.
b. transporting carbon dioxide.
c. limiting the spread of pathogens.
d. transporting nutrients.
e. secretion of neuropeptides. ANS: e. secretion of neuropeptides.
RhoGam injections are given to
Select one:
a. desensitize the fetus.
b. activate fetal Rh antigens.
c. protect the father.
d. prevent sensitization of the mother.
e. change the mother's blood type. ANS: d. prevent sensitization of the mother.
Bilirubin
Select one:
a. is found in white blood cells.
b. may be reused in erythropoiesis.
c. is formed from the globin groups of hemoglobin.
d. is made from bile.
e. may build up in the circulation and cause jaundice. ANS: e. may build up in the circulation and cause
jaundice.
An increased amount of heparin in the blood might
Select one:
a. speed up the clotting process.