help me with my hormones please

[raybay]

now i have your attention,can someone help me with my homework please?

why cant insulin be given by mouth?in diabetics

list 3 ways neural control differs from endocrine control?


what is the meaning of hormone and endocrine control?

name 3 major types of chemical substances which are used as hormones/provide an example of a hormone for each group?

thanks in advance for any help

[Poison]

Just some hints:
Insulin works when given in your blood. Why? What is the structure of insulin? when you get anything by mouth what happens? etc...

neural-endocrine control: Which one is faster? slower? etc...
definitions and rest: find them yourself. you can do it.

[Dr.Stein]

@raybay: Please try to answer by yourselves by write them here. Then, after reading your answer, we will help you to add this and that ok? Good luck with your study!