These allergens cause the immune system to overreact, activating cells that produce inflammation in the skin.

Breast cancer cells are known to activate normal cells called osteoclasts that break down bone.

Photostimulation is the use of light to artificially activate biological compounds, cells, tissues, or even whole organisms.

These include molecules that activate different cells in the immune system, as well as fragments of infectious organisms.

Starts the complement cascade to identify bacteria, activate cells and clear out dead cells.

Only a limited number of KIRs have the ability to activate cells.

TNF helps activate other immune cells and plays a major role in initiation of inflammation.

Another theory holds that cold air activates certain inflammatory cells in the airways.

Two stimuli that activate cells in the same area of the cortex will provide the strongest competitive interactions.

Might somebody be activating cells of bad guys and turning them loose?