Answer:
Active transport is a mechanism that requires molecules to move against a gradient of concentration. The procedure needs energy.
The glucose molecules in the gut may be higher than in the intestinal cells and blood – e.g. after a sugar meal.
Explanation:
Active transportation is a process necessary for molecules to travel against gradient concentration. It takes energy to do this.
Ions are transferred to the root hair for the use of mineral ions in plants, which have an increased concentration compared to diluted soil solutions. Active transport occurs to enable the plant to take in the soil around the plant the nutrients it requires.
Glucose molecules in animals must be transported into the blood through the gut wall. In the intestine, glucose molecules may be more concentrated than in the intestinal cells and blood - following a sugar meal, for example. It will then spread from high intestinal concentrations to lower blood levels. This requires no energy.
However, glucose levels in the intestines may be lower sometimes. In that instance, active transport is involved in the transportation of glucose. This procedure requires breath-generated energy.
