1. Hormones: Human Reproduction
Biology 12

3. What is a hormone?
A substance produced by one gland or organ of the body that then travels through the bloodstream to affect other tissues, organs, etc.
Hormones regulate everything from growth, sexual development, the reproductive cycle, digestion, sleep, etc.

4. Male Hormones:

5. Female Hormones:

6. Negative feedback: air conditioner analogy
Generally, an air conditioner has a thermostat that you set to a specific temperature.
Throughout the day and especially during the summer, your home heats up to the point where it gets warmer than the temperature set on your air conditioner thermostat.
As the temperature gets to hot, the air conditioner kicks on and cools the house to the set temperature. When it reaches that set temperature, the air conditioner turns off and the process continues again. This system ensures that your home is never too hot or too cold.

7. Negative Feedback:
A negative feedback loop occurs in response to a physiological change which triggers a hormone release.
The hormone rise triggers the endocrine system to STOP producing the hormone once it reaches a certain level.
This negative feedback prevents the overproduction of hormones

8. (brain)
Generalized example:
(testes or ovaries)

9. To do: Menstrual Cycle Graphing Large graph sheet Bio 12 textbook
Instruction sheet