Nutrients enter a cell the concentration gradient by the process of
a) with; diffusion
b) against; osmosis
c) against; diffusion
d) with; endocytosis

A) with; diffusion

Explanation: What is diffusion? It is the movement of a substance from an area of high concentration to one of low concentration. Where does diffusion occur? Diffusion occurs in liquids and gases since their particles move randomly. It is a crucial process for living things because it is how substances move in and out of cells.

when a reversible reaction is occurring in both directions at the same rate; the products and reactants do not change in concentration. a chemical reaction where the compound is broken into its constituent parts.

after receiving a stimus, the sensory receptors send(s) signals to the appropriate area of the body.  

the must be sensory neurons.  

hope its .