Catalyst 1 Mouths are quiet 2 Homework in

Catalyst: 1. Mouths are quiet. 2. Homework in your folder. 3. Begin the quick review section of your notes. 4. Raise your hand if you need something.

Quick Review 1. Put the five levels of cellular organization in order from the most simple to the most complex on the lines below: cell, organism, organ system, tissue Cell Tissue Organ System Organism

Quick Review 2. What are three organelles that are found only in plant cells but not in animal cells? List their name and their function below: a. Organelle: Chloroplast Function: Help use sunlight to produce glucose and oxygen b. Organelle: Cell Wall Function: Provide structure and support c. Organelle: Large Central Vacuole Function: Store water and minerals

Quick Review 3. What are the reactants in photosynthesis? Write both the word and the chemical symbol for each reactant: Water (H 2 O), Carbon Dioxide (CO 2), and Sunlight

Quick Review 4. What are the products in photosynthesis? Write the both word and the chemical symbol for each product: Glucose (C 6 H 12 O 6), Oxygen (O 2)

Quick Review 5. What are three major purposes of the cell cycle? Growth, reproduction, repair

Unit 4. 11 – Homeostasis BY THE END OF THE DAY YOU WILL: 1. Be able to define the term homeostasis. 2. Be able to explain how living things work to maintain homeostasis.

How would you feel if you were here?

How would you feel if you were here?

Key Points 1. Homeostasis is the maintenance of stable internal environments in the body BALANCE!

Key Points 2. All living things respond to their environment to maintain homeostasis

Brain. Pop Video http: //www. brainpop. com/health/bodysyste ms/homeostasis/

Guided Practice On the front of your notes Work WITH us, not ahead.

Video 1

VIDEO 1: How does this video show homeostasis? The leaf absorbs water across its cell membrane so that it can have the right amount of water in its cells to be stable.

Video 2

VIDEO 2: How does this video show homeostasis? Human skin heals itself in order to maintain good health and protect the internal body.

Video 3

VIDEO 3: How does this video show homeostasis? When people are cold they will shiver (muscles contract) to try to keep their temperature stable.

Video 4

VIDEO 4: How does this video show homeostasis? When your muscles are dehydrated and low in electrolytes, they start cramping. To maintain homeostasis, humans drink water and electrolytes (e. g. , sodium and potassium from Gatorade).

I-N-D-E-P-E-N-D-E-N-T DO YOU KNOW WHAT THAT MEANS? “I do my own work!”

1. What is homeostasis?

2. Why do you think homeostasis is important to our lives as humans? ?

3. Do you think a rock on the side of the road would maintain homeostasis? Explain.

4. Imagine that you want to try to swim with Bear Grylls in the cold waters of Alaska. How would your body react and why would it react that way?

REVIEW SET 1 - DIRECTIONS: For the following questions, fill in the blanks with these terms: cell, organism, organ system, tissue. Words may be used more than once or not at all. 5. Millions of skin cells will work together to form a(n) _________. 6. Connective tissue, epithelial tissue, smooth muscle tissue, blood, and nerve tissue all work together to make the stomach. The stomach is a(n) _________. 7. A human is made up of organ systems like the digestive system and a circulatory system. All of the systems in a human combine together to make up a(n) __________.

EXIT TICKET TIME Notes away, mouths closed.

1. Which of the following words is used to describe how living things maintain a stable internal environment? A. Respiration B. Conservation C. Photosynthesis D. Homeostasis