Two examples of active transport include the root hair cells in plants taking in mineral ions and humans taking in glucose through their intestines. In general terms, active transport refers to a substance moving from ar... More »

Active transport requires energy because it is pumping particles, such as proteins, ions and sugar molecules, against a concentration gradient: from areas of lower to higher solute concentration. The main energy source f... More »

Active transport is important for cellular function because it moves important items, such as calcium and glucose, into and out of cells. Proteins sit on the cell membrane, with one part inside and one part outside the m... More »

Active transport requires energy because it is pumping particles, such as proteins, ions and sugar molecules, against a concentration gradient: from areas of lower to higher solute concentration. The main energy source f... More »

Examples of facilitated diffusion are the passing of K+ ions through a membrane with an aid of a potassium transport protein and the passing of glucose and amino acids with the aid of proteins called permeases. Retinol b... More »

Active transport is a method cells use to move individual molecules from areas of lower concentration to areas of higher concentration. This transport is generally from inside the cell to outside the cell or vice versa. ... More »

Insulin's function is to help regulate glucose levels in the blood by transporting glucose into the cells of the human body. If a person doesn't produce enough insulin or doesn't respond well to insulin, he may have diab... More »