Which of the following cell is a multipotent cell?
A.
T-cell
B.
B-cell
C.
HSC
D.
Monocytes
Answer: Option C
Explanation:
Hematopoitic stem cell (HSC) can give rise to a number of cells by following two pathways and known as a multipotent cell. One pathway gives lymphoid progenitor cell while others give myeloid progenitor cell.
The origin and maturation of B-cell take place in the bone marrow itself while in birds B-cells originate from bone marrow but mature in the bursa of fabricius.
Which of the following is NOT polymorphonuclear leukocytes?
A.
Eosinophils
B.
Mast cell
C.
Macrophages
D.
Basophils
Answer: Option C
Explanation:
Polymorphonuclear leukocytes are those that have irregular-shaped nuclei with more than two lobes. Their cytoplasmic matrix is rich in substances which can kill microorganisms and increase inflammation.