Which of the following statements is not true about hormones?
-
Their responses are voluntary
- They may affect more than one target organ
- They are chemical messengers in animals
- They are transported by the blood to the target organs
The correct answer is: A
Explanation
Hormonal responses are involuntary, meaning they are not under conscious control. The endocrine system, which secretes hormones, is responsible for involuntary activities like growth and regulating emotions.