TOPIC: Regulation Aim: Explain the importance of negative feedback. Do Now: Next slide HW: Finish skeletal system reading notes Nervous and Endocrine System Castle Learning due Thursday!

A B C D E terminal branches F

Identify all glands labeled in the diagram. Pituitary gland Thyroid gland Parathyroid gland Pancreas Ovaries Adrenal glands

To communicate between cells, humans and animals use: 1.nerve signals and respiratory gases 2.respiratory gases and hormones 3.bones and muscles 4.nerve signals and hormones

Negative Feedback

Temperature goes above set value Thermostat turns heat off Temperature falls below set temperature Thermostat turns on heat Thermostat

Maintains homeostasis Controls the release of hormones throughout the body

insulinglucagon 1. Maintaining blood glucose levels with insulin and glucagon Examples

1.What occurs after you eat a meal? 2.What effect does eating a meal have on your glucose levels? 3.How does the pancreas respond? 4.Describe the effect insulin has on the body.

and more glucagon

2. Amount of thyroxine in the blood

Thyroxine Level Thyroxine level too low Pituitary gland secretes TSH TSH stimulates thyroid to produce thyroxin Thyroxine level increases Thyroxine level too high Pituitary gland stops TSH production Thyroid decreases thyroxine production Thyroxine level decreases

3. Maintaining body temperature (thermoregulation)

Let’s summarize… 1.Describe the importance of negative feedback. 2.Describe how negative feedback maintains your blood sugar level. 3.Identify some other examples of negative feedback.

C A B Medulla oblongata Cerebellum Cerebrum Involuntary activities Memory, thinking and reasoning Balance and coordination