Biology Physiology- Introduction & Homeostasis

Name__________________________________

Cells Review • What is a cell? • The _______ ______ of _______

Date________________ Per_____

• _____________ cells (bacteria cells) • _____ _________, no membrane-bound organelles. Has ribosomes.’ • Eukaryotic cell (_______ and _________ cells) • Contains more organelles with specific functions • Golgi Apparatus, Lysosome, Mitochondria, Nucleus, etc Cells in the Human body • Every cell in the body acts _______________ AND as part of a ________ • How does it do this? The body has many different __________ of organization Levels of Organization 1. Cells 2. __________: groups of similar cells that all do one job 3. _________: group of tissue work together to perform big job like as pumping blood 4. ________ __________: group of organs that perform a series of closely related jobs (ex. digesting food) 5. _______________ (human!)

Homeostasis • We know the body has a lot of organs that do their own jobs. • But, they all _________ ___________ to keep the body running smoothly. Keep it __________ • They work together to maintain __________________ • Homeostasis = keeping the inside of the body the __________ even when the _________ changes. BALANCE • (YOU ANSWER) Why is it important to keep our __________ environment (inside the body) the same? (look at your flip/flop)

Your answer Jackson’s answer:

STAR test review: Enzymes _____________ that _________ up chemical reactions (increase reaction rate) ___________ ______________ _________ (energy needed to start a reaction) Lock-and-key fit: __________ binds to enzyme’s _______ ________ to work Affected by temperature, pH, and how much substrate there is CHECK FOR UNDERSTANDING: HOMEOSTASIS If temperature or pH were NOT controlled by the body (if there was no homeostasis), what could happen to the enzymes? (what happens to enzymes when they get too hot!?) Your answer: Jackson’s answer (if different from yours):

Bottom Line 1. Your body’s systems all work together to _________ ___________ (inside) _________ even when the ___________ (outside) environment is ___________. This is __________________. 2. During our Physiology Unit we will ____________ more examples of homeostasis. Always ask yourself: _____ do the _______ __________ work together to _________________________________________?