Catalyst part 1 Write a response to yesterday’s discussion on the achievement gap. How did you feel listen- ing to it? What implications will it have on your life? Have you ever had someone tell you that you couldn’t do something? What happened? What will happen now?
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Catalyst part 1 Write a response to yesterday’s discussion on the achievement gap. How did you feel listen- ing to it? What implications will it have on.
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Catalyst part 1Write a response to yesterday’s discussion onthe achievement gap. How did you feel listen-ing to it? What implications will it have on your life? Have you ever had someone tell youthat you couldn’t do something? What happened? What will happen now?
Binders by tomorrow
Test grades and quiz retakes tomorrowQuiz reaveraged
Catalyst part 2
1) What does it mean to be in balance?
2) Why is it important to maintain balance?
3) Give an example of something in your body that must remain balanced?
Answer in your composition or spiral note-book. You have 2 minutes.
Homeostasis{or maintaining the balance}http://www.youtube.com/watch?v=LTCDGzF7s54
Osmosis: The diffusion of water from high to low concentration
Passive transport results in equilibrium when the gradient is balanced. Movement still continues but there is no net change in concentration.
Facilitated diffusion (Facilitated= help/assist): Diffusion of particles with the help of a carrier protein or protein channel. Moves from high to low concentration. Still no energy usage.
Can be a protein channel (the particles just move through) or a carrier protein (changes shape to allow particles to fit through)
1. Which direction will the water move? __________________ What type of transport? _______________
2. Which way will the glucose molecules move across the membrane? Draw an arrow to show the movement. What type of transport is this? ___________________
3. Which of the following represents dynamic equilibrium?A. Water was 80% inside the cell and 80% outside the cellB. Protein was 30% inside the cell and 35% outside the cellC. Water was 85% inside the cell and 80% outside the cell
4. Fill out the chart to compare and contrast the types of PASSIVE TRANSPORT. Put an X in the box if the statement is true.
Diffusion Osmosis Facilitated Diffusion
Moves from HIGH to LOWNeeds a proteinNeeds energyMoves particlesMoves water
Active Transport: a substance can move across the membrane, AGAINST the concentration gradient with the help of ATP• LOW to HIGH concentration• Needs a PROTEIN CARRIER“pump”• Needs ATP (energy)
Practice!1. What type of transport will move the H+ ions
from low to high?
2. Freshwater protozoans, such as Paramecia, must constantly pump water out to keep from bursting. What does this tell you about the concentration of particles inside a Paramecium compared to the concentration of particles of its environment?
3. Fill in the table below to compare and contrast PASSIVE and ACTIVE transport. Place an X in the boxes that apply.
Diffusion Osmosis Facilitated Diffusion
Active Transport
Moves from HIGH to LOWMoves from LOW to HIGHNeeds a proteinNeeds energyMoves particlesMoves water
Check Yourself:1. If a particle is moving from high to low concentration, what type of transport will it use?
2. If a particle is moving from low to high concentration, what type of transport will it use?
3. If water is moving from high to low, what type of transport will it use?