1
,2
, Hemoglobin abnormality
Erythrocyte abnormality
Explanation: Similar to the anemias of adulthood, ineffective erythropoiesis or premature
destruction of erythrocytes causes the anemias of childhood. The most
common cause of insufficient erythropoiesis is iron deficiency. The other
options may be causes but are not common ones.
Question 5. Which statement is true concerning the IgM?
IgM is the first antibody produced during the initial response
to an antigen.
IgM mediates many common allergic responses.
IgM is the most abundant class of immunoglobulins.
IgM is capable of crossing the human placenta.
Explanation: Typically, IgM is produced first (primary immune response), followed
by IgG against the same antigen. The other options are not true
statements regarding IgM.
Question 6. Where in the respiratory tract do the majority of foreign objects
,2
, Hemoglobin abnormality
Erythrocyte abnormality
Explanation: Similar to the anemias of adulthood, ineffective erythropoiesis or premature
destruction of erythrocytes causes the anemias of childhood. The most
common cause of insufficient erythropoiesis is iron deficiency. The other
options may be causes but are not common ones.
Question 5. Which statement is true concerning the IgM?
IgM is the first antibody produced during the initial response
to an antigen.
IgM mediates many common allergic responses.
IgM is the most abundant class of immunoglobulins.
IgM is capable of crossing the human placenta.
Explanation: Typically, IgM is produced first (primary immune response), followed
by IgG against the same antigen. The other options are not true
statements regarding IgM.
Question 6. Where in the respiratory tract do the majority of foreign objects
