Nervous and hormonal communication comparedSpec 2.86
Both the nervous system and the endocrine system control responses in the body. The endocrine system is made of glands that secrete hormones directly into the blood. The blood carries the hormone to its target organ, where it causes an effect.
| Nervous communication | Hormonal communication | |
|---|---|---|
| Message carried by | Electrical impulses along neurones | Hormones (chemicals) in the blood |
| Speed of response | Very fast | Slower |
| Length of effect | Short-lived | Longer-lasting |
| Where it acts | Specific effectors (muscles or glands) | Target organs, which can be anywhere in the body |
Exam tip:
Compare in three words: slower, longer, chemical. Hormones travel in the blood, so they reach every part of the body but only affect their target organ.