Bonus challenge can you do it using only 3 straight lines Do Now solutions Active and Passive Transport Unit two building blocks of life 80 mastery of content 80 mastery of lab material 3 point increase on ACT ID: 529029
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Slide1
Connect the dots using four straight lines without removing your pen from the paper. Bonus challenge: can you do it using only 3 straight lines?
Do NowSlide2
solutionsSlide3
Active and Passive Transport
Unit two: building blocks of lifeSlide4
80% mastery of content80% mastery of lab material3 point increase on ACT
GoalsSlide5
You are a bouncer at a concertYou are a little bit shady.Some people can pay you to let them in, even if they don’t have tickets.
Bouncers at a concert…Slide6
Question 1:
How much money would
Beyonce
and David Beckham have to pay you to let them into the concert?Slide7
Question 2
How much money would these people have to pay you to let them into the concert?Slide8
Cell membranes work the SAME way as bouncersSome cells can get in, some
can’tThis setup is called a SEMIPERMEABLE membrane
Bouncers at a concert…Slide9
This is sneaking in the back door of the concert. There are NO bouncers here!No cell membrane blocking movement of particlesRequires NO energy from the bouncers (cell)
Diffusion: In concertsSlide10
EASY to doMovement of particles from an area of HIGH concentration to an area of LOW concentrationRequires no energy for the bouncers – it just happens
.This is called PASSIVE TRANSPORT
Diffusion: In cells…Slide11
PerfumeAir in a tireOxygen across a cell membrane
Food coloring into waterSmells spreading from the oven to the rest of the house
Examples of DiffusionSlide12
DIFFUSION of a substance through a SEMIPERMEABLE membranethat’s the bouncer at the concertNo extra energy is needed (like David Beckham)
This is called PASSIVE TRANSPORT
Examples
Plant roots absorbing water
Dipping a sponge in water
When you soak your hands for a long
time and they start to look funny
Passive transport: OsmosisSlide13
Some things take a extra ENERGY (or money) to get past the cell membrane (bouncers)Moves against diffusion
This is a process called ACTIVE TRANSPORTExamplesMoving in something we need (sugar)
Push out waste (CO
2
)
Active transportSlide14
In pictures…Slide15
Questions to write about…How do large particles, those too large to diffuse, get into cells?Do cells have mouths?
Does swallowed food mix with directly with the other parts of a cell?
Stop and jot (2 minutes)Slide16
You will be working with the people at your groupSend one representative from your group to pick up…One plastic bag
4 pieces of starburstDO NOT EAT THE STARBURST (yet!)
lab timeSlide17
Your plastic bag is your cell membraneYour goal: to find a way to get the
food INTO THE CELLRules
The candy must enter through a solid part of the bag.
The inside of the bag may not be directly open to the external environment.
The candies entering the bag must remain clustered together.
You may
work with
your hands
in the bag
in order to
act as the inside of a cell.
The candy may be eaten only if it enters the bag "cell" under the specified conditions.
To qualify to EAT the starburst, your team must..
1) solve the problem
2) draw a picture of how it happens
LAB TIMESlide18
What does this mean about how food enters a cell?Is this passive or active transportation?
Solution?