Which lists three living units of the human body in order from the simplest to the most complex level of organization?

The list is cell, tissue and organ.

The basic structural and functional unit of the body is known as the cell.These are smallest unit of the body that performs all the vital functions of the body.

Tissues can be defined as the combination of cells that aims to perform the same function. Some examples are: connective tissue, epithelial tissues, et cetera.

Organs can be defined as the distinct structures present in the body such as heart, kidney, lungs,et cetera which is made of tissues and ultimately cells.

it enhances antibody production by t cells of the adaptive immune system.

hope i'm right

explanation:

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.