HMB202H1 Lecture Notes - Lecture 3: Collagen, Pattern Recognition Receptor, Mast Cell
Document Summary
Last week we talked about the differences between gram negative and gram positive. During de-colourizing the outer membrane in the gram negative cell is soluble with ethanol. Basic dyes have a net positive charge, this allows it to remain inside the bacteria cell, meaning the bacteria cell must have a negative charge, that comes from it"s. Dna which is negatively charged, it has no nucleus. Salty skin secretion + acidic environment make it un-hospitable to bacteria. Stroma - holds it together - lots of collagen and lots of fat. they form tight - gap junctions so nothing gets through the compartments of the thymus. What happens if something does get through and the t cells can"t handle it because the t-cells can"t handle it yet. If this happens the body shuts down the compartment, the compartment then shuts down and dies. 1- outer 2 - mid cortex 3- deep cortex around puberty age most of the changes occurs.