1. Without looking at your notes how many body systems can you remember (write them down).

2. Can you name at least one major part or organ for each system? Can you do it without using your notes?

Skin, bones, smooth muscle (digestion), heart, lungs, liver, kidney, antibodies, ovaries/testes, thyroid gland, nerves.

Integumentary, skeletal, muscular, circulatory, respiratory, digestive, excretory, immune, reproductive, endocrine, nervous.

Homework and Announcements

Achieve 3000 – You choose 2 – due May 20Baby Project – Due May 20, 2015Body System Flash Cards / Graphic Organizer

SystemOrgansFunction (what does it do?)

Hormoneschemical messengers Endocrine system

secretes hormones into blood & other fluids

communicate with target cells

affect growth, puberty, metabolism

nerves from the sensory organs

(see, hear, smell, touch, taste)

Internal stimuliExternal stimulinerves and other hormones from inside the body

Brain Reaction!

nerves from hypothalamus and brainstem

Discuss

What’s the difference between nerves and hormones?

Why both kinds of controls?

•Remember, external means coming from outside of your body and internal means coming from inside of your body.

1. You hear a loud noise

2. A large dog runs toward you, growling and barking

3. You eat a large candy bar

4. You have not eaten in six hours

5. You have strep throat

Response – Body’s reaction to a stimulusIs the stimulus external, internal or a combo?

A chain of events occur that lead from the stimulus to the response.

StimuliResponse

Negative feedback – start and stop hormone production

You eat. Glucose (sugar) in the blood increases.

Increased glucose is detected by receptors that notify the brain. It sends a message to the pancreas to produce insulin.

Insulin tells muscle and liver to take upglucose from the bloodstream and use it for energy or store it for later. Brain reduces appetite.

Blood glucose level drops as it is removed by the cells.

Pancreas stops making insulin.

In the case shown in this picture, the body produces insulin but the target cells become resistant and unresponsive to it. Diabetes can also be caused by the body not producing enough insulin. The glucose does not enter the muscle and liver cells like it should and it builds up in the blood causing complications.

Diabetes

pituitary gland to the uterus

hormone oxytocin causing

contractionspressure of the fetus on the cervix

sends a signal back to brain

release more oxytocin causes more contractionsfetus pushes harder on cervix more oxytocin

The system continues until birth occurs.

positive feedback system – continues hormone

production

Do you know where each hormone comes from, where it acts, and what the action is? Guess first, then click each to find out.

Progesterone

Thyroxine

Estrogen

Testosterone

Cortisol

Adrenaline

Insulin

Done

Where it comes from: Adrenal Glandreleased in high stress conditions, excitement, or fear.

Where it acts: heart, blood vessels, eyes

What it does: stimulates heart rate, increases blood pressure, dilates pupilsCauses "Adrenaline Rush”'fight and flight' hormone.

Return to hormones slide

• Where it comes from:

ovary (where an egg was released)

• Where it acts: uterus• What it does:

controls menstruation role in pregnancy.

(One of the components of birth control pills)

Return to hormones slide

Where it comes from: thyroid gland

Where it acts: most cells of the body

What it does: controls metabolism(how energy is used) influences physical development

hypothyroidism: People may not produce enough of this hormone

Take thyroxine to treat this condition. Return to hormones slide

Where it comes from: testicles, ovaries

Where it acts: body-hair cells, muscle, reproductive structures

What it does: development of male sexual

characteristicsmuscle developmentother body functions

Testosterone is a steroid a few athletes take it to

“improve” performance. doping is a very dangerous Return to hormones slide

Where it comes from: ovary

Where it acts: breast tissue, female reproductive structures

What it does: stimulates development of female sexual characteristics

Estrogen levels can cause migraine headaches in women.

Return to hormones slide

Where it comes from: adrenal gland

Where it acts: multiple tissues

What it does: mental stimulation, breaks down fat and protein to glucose, anti-inflammation

"stress hormone” involved in response to stress and anxiety.

Return to hormones slide

Where it comes from: pancreas

Where it acts: liver, musclefat tissue

What it does: Insulin causes cells to take up glucose (sugar) from the blood, and stores it in the liver and muscle.

Problems with insulin can lead to diabetes.

Return to hormones slide

What is the major role of the Endocrine System? What are hormones? How do hormones work? At what times in your life do you think your

Endocrine System is most active?

Graphic Organizer and Index Cards Baby Project – Get with your partner

Research online Make a Plan

(what will your power point slides look like) (plan out a poster or 3D model) (are you making a video, skit, or animation?) How are you presenting the information? Who will say what?

Put it together (15 days left until due date) Do you need help? Have any questions?