Question

1. What type of cells do antigen presenting cells present their antigens to?

1. What is another name for red blood cells?

7.5 points   

QUESTION 13

1. What type of receptors are found on the surface of all human cells and are mainly used to present antigens?

1. When any cell presents an antigen on an MHCI type receptor, what type of T lymphocyte will recognize this type of presentation?

1. What is the fate of any cell displaying a foreign antigen on an MHCI type receptor?

		It will survive and activate inflammation
		It will release cytokines to attract B cells
		It will begin producing antibodies
		It will be killed by a Tc cell

Answer 1

What type of cells do antigen presenting cells present their antigens to?

• Antigen presenting cells include macrophages, dendritic cells and B cells. These cells have MHC (major histocompatibility complex) class II molecules that present the antigens to T cell receptors. The T helper cells or CD4+ cells are class MHC II restricted. These cells get activated by recognizing antigen-MHC II complex on the surface of an antigen presenting cell.

What is another name for red blood cells?

• Red blood cells are also called as erythrocytes. They comprise a major amount of the cellular components of blood.

What type of receptors are found on the surface of all human cells and are mainly used to present antigens?

• Major histocompatibility complex (MHC) class I molecules are glycoproteins that are expressed on the surface of all human cells and present antigens to T cytotoxic cells/CD8+ cells.

When any cell presents an antigen on an MHC I type receptor, what type of T lymphocyte will recognize this type of presentation?

• T cytotoxic cells or CD8+ cells are activated by recognizing antigen-class I MHC complex on the surface of an infected or altered cell.

What is the fate of any cell displaying a foreign antigen on an MHC I type receptor?

• The correct option is D. The cell that displays an antigen complexed to MHC I receptor is recognized by T cytotoxic (T_C) cells. Due to this, the T cytotoxic cells get activated and kill the cells.