Quick Answer. A low hemoglobin count, also known as anemia, is caused by pregnancy, a menstrual period, a diet low in iron, blood loss, or a disease that causes the body to produce fewer red blood cells or to destroy red blood cells. According to the Mayo Clinic, medications also sometimes cause anemia.
A cytotoxic T cell (also known as TC, cytotoxic T lymphocyte, CTL, T-killer cell, cytolytic T cell, CD8+ T-cell or killer T cell) is a T lymphocyte (a type of white blood cell) that kills cancer cells, cells that are infected (particularly with viruses), or cells that are damaged in other ways.
Definition. Most nucleated cells process antigens through the MHC class I mechanisms, viral antigens are processed by the MHC class I mechanism and are presented to the cell surface, and cytotoxic T cells bind to MHC class I processed antigens. D. Cytotoxic T cells bound to the MHC class I processed antigens release lymphokines.