Aim: How does the Endocrine System Function to Maintain Homeostasis? DO NOW In your notebook, write down any facts about the endocrine system that you know.

Endocrine System Made up of Glands Glands secrete Hormones Regulatory System Function: to secrete hormones that regulate bodily functions Mechanism: Negative Feedback (ex. home thermostat)

Hormones Chemical messages Travel in the blood Longer-lasting message Each hormone has a target organ Hormone must match receptor present on target organ for message to be delivered (shapes will fit) Enables Communication

Endocrine Glands Gland(s) Hormone(s) Function How many? Pancreas Insulin & Glucagon lower & raise blood sugar level one Testes (male) Testosterone Promotes male secondary sex characteristics & stimulates sperm production two Ovaries (female) Estrogen Promotes female secondary sex characteristics & stimulates egg production Adrenal Glands Adrenaline Prepares you for “fight or flight” response Two (one above each kidney)

Endocrine Glands Gland(s) Hormone(s) Function How many? Pituitary (Master Gland) Human Growth (HGH) Anti-Diuretic (ADH) regulates growth regulates amount of water in body one (in brain) Thyroid thyroxine regulates body metabolism one Parathyroids parathormone raises calcium level in blood two

Visual

Negative Feedback Visual

Questions 1. What is the target organ for insulin? 2. What is the target organ for testosterone? 3. What is the target organ for estrogen? 4. What is the target organ for ADH?

Video https://www.brainpop.com/health/bodysystems/endocrinesystem/

Group-Work Practice questions on hormones handout

Individual Work Answer AIM

Homework regents question handout (multiple-choice)