Cells found in the skin that take up foreign antigen and migrate to the lymph nodes is called

Dendritic cells

Explanation:

Dendritic cells are the antigen-presenting cells which bind to the antigen and present them to the adaptive immune cells called B and T lymphocytes.  The dendritic cells are the cells which are considered the innate immune cells and they connect the innate immune response to the adaptive immune response.

The dendritic cells are present in the skin, the alimentary canals and the mucus which binds the antigen and under the guidance of the cytokines are migrated to the secondary lymphoid organs like the spleen and the lymph nodes where they present them to the lymphocytes.

Thus, the dendritic cell is correct.

it provides an alternative energy pathway for the reaction to proceed.

a catalyst is a substance that speeds up the rate of a chemical reaction but is not consumed during the course of the reaction.

catalysts increase the rate of reaction without being used up. they do this by lowering the activation energy needed. with a catalyst, more collisions result in a reaction, so the rate of reaction increases. different reactions need different catalysts.

a catalyst works by providing an alternative reaction pathway to the reaction product. the rate of the reaction is increased as this alternative route has a lower activation energy than the reaction route not mediated by the catalyst.