Question

Null (NK) lymphocytes will work with which type of T cell to kill/neutralize a pathogen? a. CD4 T Lymphoctes b. CD 8 Cytotoxic T Killer Cells c. Memory Cells d. Plasma Cells

Red Blood Cells are made in the _____________ from______________.

	a.	Liver; Hematopoietic Stem Cells
	b.	Spleen; Lymphoid Stem Cells
	c.	Bone Marrow; Myeloid Stem Cells
	d.	Kidneys; Myeloid Stem Cells

Answer 1

1.

The correct option is B - CD 8 Cytotoxic T killer cells

NK cells belong to null lymphocytes. NK cells are natural killer cells. NK cells kill infected host cells. Natural killer cells release perforins and kill the infected cells. Null (NK) lymphocytes work with CD8 cytotoxic T killer cells to kill infected cells. CT8 cytotoxic T cells are cytotoxic T lymphocytes that produce cytotoxic granules and kills infected cells. The cytotoxic granule of the cytotoxic T cells and NK cells contain perforin that forms pore on the target cell

2.

The correct option is C - Bone marrow; myeloid stem cells

Blood cells and platelets are produced in the bone marrow of the bones. Red blood cells (erythrocytes) are produced in the red bone marrow of the bones. The process of the formation of red blood cells is called erythropoiesis. The red bone marrow is a myeloid tissue. The hemocytoblast cells in the bone marrow form lymphoid stem cells and myeloid stem cells. Myeloid stem cells give rise to red blood cells, white blood cells, and platelets