In vertebrates, which biological system carries out more chemical reactions than any other organ or system?

Digestive System

Explanation:

    The digestive system is responsible for the process of digestion, that is, processing and absorption of food in order to meet the needs of all cells. The proper functioning of this system is due to two important aspects:

    - Compartmental, that is, as much as the various organs that make up this system are physically linked, they still have, within certain limits and harmony, independence of functioning. In other words, each organ will perform a particular function even though it is connected to other structures;

    - Enzymatic, that is, the food will pass through the different organs and, as a result, will undergo the enzymatic action of different enzymes in each region.

    A valid caveat is that during the digestion process physical and chemical changes occur with the food, which aims to create chemical structures and the ideal physical condition to be absorbed.

answer: 21

step-by-step explanation:

divide 630 by 30. 30 goes into 630 21 times

the solute can move "downhill," from regions of higher to lower concentration, relying on the specificity of the protein carrier to pass through the membrane. this process is called passive transport or facilitated diffusion, and does not require energy.