Use the general features of all epithelia and connective tissues to compare and contrast the epidermal and dermal tissues. Define what a stem cell is in all tissues and describe how the stem cells of the stratum basale divide to replenish the epidermis. Describe the functions of three non-keratinocytes (tactile or Merkel cells, dendritic cells and melanocytes) within the epidermis. strata.

many other transport proteins, often called pumps, move materials against a concentration gradient. active transport drives molecules across a membrane from a region of lower concentration to a region of higher concentration. this process, shown in figure 5.1, uses transport proteins powered by chemi- cal energy.

transformative rocks are the stones that emerge from the transformation of existing rock composes in a procedure called changeability, implies changing of structures. transformative rocks are shaped from alternate shakes that are changing a result of warmth or weight connected. one of this model is the earth developments that making rocks profoundly cover or crushed which will make the stones warmed and put under awesome weight. they are not softening but rather the minerals they are containing are changed synthetically that will shape transformative rocks. now and again different rocks are shaped when the others are near some liquid magma and getting warmed.