CELL STRUCTURE CELL BOUNDARY CELL MEMBRANE OR PLASMA
CELL STRUCTURE CELL BOUNDARY CELL MEMBRANE OR PLASMA MEMBRANE CHAPTER 2, LESSON 3, PAGE 60
OBJECTIVES • DISTINGUISH BETWEEN THE TYPES OF CELLULAR MOVEMENT OF MATERIALS INTO/OUT OF CELLS; PASSIVE TRANS PORT AND ACTIVE TRANSPORT. • WHAT MATERIALS MIGHT ENTER OR LEAVE A CELL? • WHAT DOES SELECTIVELY PERMEABLE MEAN? • IDENTIFY THE PARTS OF THE CELL MEMBRANE.
PARTS OF THE CELL MEMBRANE • PHOSPHOLIPID BILAYER—HYDROPHILIC HEAD (PHOSPHATE HEAD) & (LIKES WATER) WATER SOLUBLE • LIPID TAILS—HYDROPHOBIC TAILS—(LIPIDS, FATS) & (HATES WATER)INSOLUBLE • PROTEINS: TRANSPORT PROTEINS AND CHANNEL PROTEINS • CHOLESTEROL DROPLETS: FOR CELL RECOGNITION ON SURFACE OF CELL MEMBRANE OR IN BETWEEN THE PHOSPHOLIPID BILAYER.
SOLUTIONS FOR CELL WATER CONCENTRATION • ISOTONIC SOLUTIONS BALANCED AMOUNT OF WATER MOLECULES/IN AND OUT OF CELL SAME; MOVING AT THE SAME RATE. • HYPERTONIC SOLUTION MORE SOLUTE MOLECULES/ LESS WATER MOLECULES OUTSIDE OF CELL-THE WATER MOLECULES MOVES OUT OF THE CELL; CELL WILL SHRINK • HYPOTONIC SOLUTION-MORE SOLVENT WATER MOLECULES OUTSIDE OF CELL -THEN THE WATER MOLECULES MOVES INSIDE THE CELL—CELL WILL BURST
HOMEWORK-ONLINE MORGAN PARK HS WEBSITE • VOCABULARY CARDS • MATCHING SHEET • READ LESSON 3 --PAGE 60 --66
WHAT DO YOU THINK? • 1. CELERY IN CLEAR WATER AND IN COLORED WATER • 2. TEA BAGS IN WARM WATER • 3. (3) BALLOONS AS COMPARABLE TO A CELL’S MEMBRANE • 4. (4) CARNATIONS IN CLEAR AND COLORED WATER WHAT HAPPENED? • CREATE A DATA TABLE—SHOWING THE MOVEMENT OF WATER
DIFFUSION • BROWNIAN MOVEMENT—MOVEMENT OF MOLECULES FROM A REGION OF HIGH CONCENTRATION TO A REGION OF LOW CONCENTRATION. • OSMOSIS—DIFFUSION OF WATER THROUGH A SEMIPERMEABLE MEMBRANE • FACILITATED DIFFUSION—DIFFUSION OF IONS THROUGH THE PLASMA MEMBRANE WITH THE HELP OF TRANSPORT PROTEINS. NO CELL ENERGY REQUIRED • PASSIVE TRANSPORT—DIFFUSION, OSMOSIS, FACILITATED DIFFUSION- NO CELL ENERGY REQUIRED • ACTIVE TRANSPORT—ENDOCYTOSIS, EXOCYTOSIS, PINOCYTOSIS (DRINKING IN BULK FLUIDS/ OILS) AND PHAGOCYTOSIS (ENGULFING FOOD PARTICLES); CELL ENERGY REQUIRED
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