Cytotoxic t-cells (cytotoxic t lymphocytes) cytotoxic t-cells (cytotoxic t lymphocytes) are the only leukocytes that have an important action inside the bloodstream represent 14% of all wbcs attack antigens directly differentiate and produce antibodies that bind to antigens are robust phagocytic cells, but what they phagocytize is unknown

The correct answer is that cytotoxic T cells attack antigens directly. Cytotoxic T cells, also called CD8+ cells, attack cells that are infected with viruses or other foreign antigens. These diseased cells express the antigen by the action of a cell surface protein called the major histocompatibility complex type I (MHC-I) protein wherein the antigen is recognized by the cytotoxic T cell by the T cell receptor. Once recognized by the T cell, the T cell will then send signals to the diseased cell to undergo programmed cell death or apoptosis.

Cytotoxic t-cells attack antigens directly. Cytotoxic T cells are CD8-positive T cells that are specialized for the direct killing of cells that are infected, cancerous or damaged in other ways. They express the glycoprotein CD8, as well as T cell receptors that recognize antigenic peptides presented by MHC class 1 molecules.

Answer:

9.9 years

step-by-step explanation:

a = p(1 + rt) . . account balance after time t at rate r starting with principal p

3000 = 2500(1 + 0.0202t) . . filling in the given numbers

1.2 = 1 + 0.0202t . . divide by 2500

0.2 = 0.0202t . . . subtract 1

0.2/0.0202 = t ≈ 9.901

it will take about 9.9 years for the account balance to reach $3000.