Question

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question 17
1 pts
what is the function of the spleen?
tissue repair
hematopoiesis
red blood cell and platelet destruction
blood reservoir
all of the above
question 18
1 pts
the function of which antibody is basically unknown?
lge
lgd
lgm
lga
question 19
1 pts
the movement of phagocytes from blood vessels to an inflammation site is called
phagocytosis.
pavementing.
diapedesis.
apedesis.

Explanation:

• Question 17: The spleen is involved in red blood cell and platelet destruction (removes old or damaged cells), acts as a blood reservoir (can release stored blood when needed), and has some role in hematopoiesis (especially in fetal life). Tissue repair is not a primary function of the spleen.
• Question 18: The function of IgD is not fully understood compared to other antibodies like IgE (involved in allergic reactions and defense against parasites), IgM (first - line defense in the immune response), and IgA (important in mucosal immunity).
• Question 19: Diapedesis is the process by which phagocytes (such as neutrophils) move from the blood vessels to the site of inflammation. Phagocytosis is the process of engulfing and digesting pathogens. Pavementing is the adhesion of leukocytes to the endothelium, and apedesis is not a recognized term for this process.

Answer:

• Question 17: red blood cell and platelet destruction
• Question 18: IgD
• Question 19: diapedesis