Across
- 2. They alter the activity of a specific target _____
- 3. Once used, Hormones are broken down in the _____
- 5. They activate target _____
- 7. Their effects are long _______
- 8. They travel in blood ______
Down
- 1. They are chemical messengers
- 4. They are secreted into the blood by ______
- 6. Because they travel through the blood, they travel ______