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Transcript
Catalyst #1: December 1st , 2014 (5 minutes) 1. What part of the cell controls what enters and leaves the cell? 2. Which term below best describes the cell membrane? A. Impermeable B. Selectively (semi) permeable C. Completely permeable D. Porous 3. What was your FAVORITE thing served at your Thanksgiving meal? OR What was the best thing about your break in general? Ms. M’s Thanksgiving Break Agenda • Catalyst: 5 minutes • Introduction to the Cell Membrane: 15 minutes • Color coding and labeling cell membrane: 15 minutes Announcements • Mastery grades • DBA prizes Objectives/Where does this fit Objective/Review • • SWBAT describe the composition of the cellular membrane as it relates to cellular transport. Homeostasis and the Cell Membrane? •What is homeostasis? •Homeostasis is the many processes that regulate our bodies to maintain balance and stability. •Some examples? • So, the body must keep things equal. • Let’s zoom into the cellular level. • “Inner Life of Cells” video • TWO observations on your notes Cells… • Cells are CONSTANTLY interacting with their environments. They have to exchange substances with the outside environment. • They play a major role in maintaining our body’s homeostasis. How do cells control what comes in and out of the cell? Exit Ticket • Which of these describe the primary function of cell membranes? A. They allow certain molecules to enter and exit the cell. B. They allow all molecules to enter and exit the cell. C. They do not allow molecules to enter nor exit the cell. D. They allow all molecules to enter the cell, but not exit it. • The phospholipids of the cell membrane have two components. Which of these parts is attracted to the water outside the cell and the water in the cytoplasm? A. hydrophilic heads B. protein channels C. hydrophobic tails D. protein receptors • The tendency of organisms to maintain a stable internal environment is called A. cellular organization B. homeostasis C. metabolism D. reproduction Which of these is an example of homeostasis in a multicellular organism? A. Inheriting a gene B. Growing larger and stronger C. Drinking an excessive amount of sugar water D. Regulating body temperature