Daily Warm-up Wednesday, October 1st

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Presentation transcript:

Daily Warm-up Wednesday, October 1st -What did the chloroplast do for you in CellCraft? HW: -Read 7.3

Cell Membrane Control what goes in and out Semi-permeable. Structure of membrane- This model is called the fluid mosaic model Stop

Cell Transport Passive Active

Passive Transport Movement of materials across membrane without energy

1. Diffusion Movement of any particle from an area of high to low concentration.

What affects the rate of diffusion? Permeability of membrane (size of holes in membrane) Concentration gradient Size of Particle

2. Facilitated Diffusion Usage of protein channels to cross the membrane Does not require energy Ex. Osmosis

Osmosis Movement of water from a high concentration to a low concentration across a membrane by aquaporins

Effects of Osmosis Isotonic Hypertonic Hypotonic

Isotonic Equal concentration of solutes on both sides of a membrane.

Hypotonic Smaller concentration of solutes Can apply to cell or solution

Hypertonic Contains a greater concentration of solutes Can apply to cell or solution

Stop

Today’s Activity Modeling scenarios with play-doh Please write and draw answers on separate sheet of paper Work with table partners, but each person needs to answer questions and do drawings.

Daily Warm-up Wednesday, October 7th A cell with 1% solute concentration is placed in a solution with 10% solute concentration. What will happen to the cell? Why? HW: -Finish osmosis questions -Study for quiz (7.2-7.3) Turn in: -Cell Craft worksheet (last chance)

Active Transport Requires energy Low to high Usually done by carrier proteins Against the gradient

Bulk Transport Endocytosis- movement of materials into the cell Exocytosis- moving large items out of the cell Why are endocytosis and exocytosis considered to be active transport?