They both can be traced back millions of years ago
The movement of Ions or molecules across a membrane from low concentration to high concentration. Which requires energy.
Adjacent cells can signal others by direct contact, while nearby cells that are not touching can communicate by the release paracrine signals.
Hope this helps,
Davinia.
Answer:
The pituitary gland is very important as it takes messages from the brain (via a gland called the hypothalamus) and uses these messages to produce hormones that affect many parts of the body, including stimulating all the other hormone-producing glands to produce their own hormones.
Explanation:
I hope this helps :3
