1. The Endocrine System

2. What is the endocrine system?
The endocrine system is a complex collection of hormone-producing glands that control basic body functions such as metabolism, mood, growth and sexual development.
Some hormones also allow you to respond to stress

3. How does the Endocrine System Regulate the Body?
It is made of glands that secrete hormones directly into your bloodstream These hormones cause changes in your body

4. What is a hormone and what do they do?
A hormone is a “chemical messenger”
A chemical that delivers a message
Hormones are made in the glands of your endocrine system and secreted into your blood
They travel through your blood until they reach special target cells

5. Can you think of any hormones and their functions?

7. Examples of Hormones Hormone Gland Function Melatonin Pineal
Causes sleepiness: “circadian rhythm”
Adrenalin
Adrenal
Fight or flight response
Growth hormone
Pituitary
Stimulates growth and cell reproduction
Insulin
Pancreas
Regulates energy and glucose (sugar) in the blood
Testosterone
Testes
Production and regulation of male reproductive system
Estrogen
Ovaries
Production and regulation of female reproduction system

8. How does the Endocrine System Compare to the Nervous System?
Like the nervous system, the endocrine system is a controlling system of the body
The brain controls the endocrine system,
but they work together to regulate the body
In the brain is the hypothalamus, also known as the "master switchboard."

9. How does the Endocrine System Compare to the Nervous System?
Hormones are transported around (to their target organs) the body by the blood. Therefore hormonal responses are relatively slow compared with nervous responses.
Many hormonal responses (ex: growth) occur over relatively long periods of time.
The main purpose of the Endocrine System is to maintain Homeostasis within the body (that is, to keep the internal environment constant/within balance)
The key function of the Nervous System is to receive and respond to stimuli.

10. Why do people pee their pants when they are scared?
There’s actually a scientific explanation! The Fight or Flight Response.

11. Fight or Flight Response
Controlled by an area of the brain called the hypothalamus: the part of the brain that links the nervous and endocrine systems.

12. Fight or Flight Response
When we think we are in danger, the hypothalamus begins a series of nerve cell firings and releases hormones like adrenaline, into our bloodstream.
These patterns of nerve cell firing and chemical release cause our body to undergo a series of very dramatic changes.

13. These changes are designed to either help you fight or run away (flight) to safety in times of danger

14. Stimulus : Response Response = Response =
Hypothalamus releases hormones into body
Response =
Heart rate and breathing rate increase, sweating increases, blood thickens, blood flow to muscles increase all so we can RUN!
Bear =
external stimulus
Hormones become =
Internal stimulus

15. Think, Pair, Share What is the Fight or Flight Response?
What causes it?
Can you name some changes that occur in your body during the fight or flight response?

16. Your cartoon must show:
Create a cartoon demonstrating an organism experiencing the fight or flight response
Your cartoon must show:
The external stimulus (what caused the stress)
How the organism responds
What happens inside their body?
What do they do?

18. What is the function of the Endocrine System?
Review
What is the function of the Endocrine System?

19. Review
The endocrine system is a complex collection of hormone-producing glands that control basic body functions such as metabolism, mood, growth and sexual development.

20. What is fight or flight response?
Review
What is fight or flight response?

21. Fight or Flight Response
When we think we are in danger, the hypothalamus begins a series of nerve cell firings and releases hormones like adrenaline, into our bloodstream.
These patterns of nerve cell firing and chemical release cause our body to undergo a series of very dramatic changes.

22. Review
What are some examples of hormones, where are they found and what do they do?

23. Examples of Hormones Hormone Gland Function Melatonin Pineal
Causes sleepiness: “circadian rhythm”
Adrenalin
Adrenal
Fight or flight response
Growth hormone
Pituitary
Stimulates growth and cell reproduction
Insulin
Pancreas
Regulates energy and glucose (sugar) in the blood
Testosterone
Testes
Production and regulation of male reproductive system
Estrogen
Ovaries
Production and regulation of female reproduction system