What is meant by stimulus and reaction?
Stimulus is the change in the environment or environmental factors to to which the organism can respond or react. Theresponse shown by organisms towards or awaya stimulus is called reaction.
What is the endocrine system? Differentiate between endocrine and exocrine glands.
The system formed by a group of endocrine gland is called the endocrine system.
The differences are:
Endocrine glands | Exocrine glands |
They don't have duct and pour their secretion directly into the bloodstream. | They have duct and secretes their product into duct. |
They secrete hormones. | They secrete enzymes. |
They are present away from the action. | They are located near the site of action. |