Immune System Physical Barriers Quiz

Cells and Tissues

• Cells of the immune system, including B cells and T cells, originate from a common precursor, the pluripotent stem cell.

Immune Response

• The adaptive immune response is specific for a particular pathogen, providing long-term immunity.

Defense Mechanisms

• Lysozyme is an antibacterial substance found in tears and saliva that helps to break down bacterial cell walls.

Skin and Barrier Function

• The outermost layer of the epidermis, comprising keratinized cells, defends the outside of the body as a tough, impermeable barrier.

Immune Signaling

• The innate immune response sends cytokine signals to the adaptive immune response, allowing for communication and coordination between the two systems.