1. Endocrine System

2. Endocrine: Ductless Glands that secret hormones into the body

3. Functions Maintains homeostasis
Long-term control using chemical signals.
The endocrine system works in parallel with the nervous system to control growth and maturation along with homeostasis.

4. Hormones Chemical Messengers

5. Delivery System

6. Endocrine Gland Stimuli

7. Grouped into three classes based on their structure:
Steroids
Peptides
Amines

8. Steroids Progesterone Aldosterone
Made of Lipids derived from cholesterol.
2. Steroid hormones are secreted by the gonads, adrenal cortex, and placenta.
Examples:
Testosterone
Progesterone
Aldosterone

9. Peptides Short chains of Amino Acids Most hormones are peptides
Processed by the E.R. and Golgi Apparatus
Stored in vesicles- released when needed

10. Amines A modified amino acid- tyrosine Stored in the cytoplasm
Example: epinephrine

11. Lipid Soluble: Such as Steroids

12. Hormones Regulate Gene Expression
First Messenger   Second Messenger Regulates Gene Expression

13. Water Soluble- 2 messenger mechanism

14. Hypothalamus: Master Gland

15. Posterior Pituitary storage of hormones produced in hypothalamus
Release upon neural impulse
Diabetes insipidus- ADH deficiency – large amount of urine output

16. Anterior Pituitary Gland
Produce and storage of hormones
Production regulated by Hypothalamic hormones-
GHRH, GHIH, TRH, CRH, GnRH, PIH

17. Regulation of Ant Pit. Hormones

18. Thyroid Hormone

19. Negative Feedback Regulation

20. Insulin and Glucagon- Regulation of Blood Sugar Levels

21. Regulation of Blood Volume and Pressure
Antidiuretic hormone (ADH) is a chemical messenger molecule which is made in the hypothalamus and stored in the posterior pituitary gland. When osmoreceptors in the posterior pituitary sense blood which is too concentrated, ADH is released to increase water reabsorption by the kidneys.
Review the maintenance of water and salt balance by means of antidiuretic hormone (ADH) and aldosterone on pages 318 and 323,
Construct feedback loop diagrams which illustrate the regulation of:
1. Water balance in the blood by ADH.
2. Salt balance in the blood by aldosterone.

22. Hormones You Need to Know
Growth Hormone
Thyroid Stimulating Hormone
ACTH
FSH and LH
ADH and Aldesterone
Thyroid Hormone
PTH
Glucagon
Calcitonin
Know:
Name
Where Produced
Target Organ
Effects