#cell bio notes

True/False: Neutrophils are the first phagocytic cells to arrive at the site of invasion.

-- also called G2 stage

-- third stage of the cell cycle

-- cells continue to carry out their normal functions

-- additional growth occurs

-- includes a critical checkpoint

-- there must be adequate cell size and undamaged DNA to proceed to the next stage

-- the next stage is mitosis, or M

-- Gap 2 occurs after the synthesis, or S, stage

.

Cytotoxic T Cells -- rupture the antigen’s cell wall and membrane -- secrete a lymphotoxin into the antigen -- this alters the antigen’s DNA and causes cell death

Memory T Cells -- recognize antigens directly to speed up future responses

Suppressor T Cells -- suppress the cytotoxic T cells when their job is complete

Helper T Cells -- produce a number of interleukins      -- IL-2      -- IL-4      -- IL-5

.