Use the information on these slides to help you fill in your paper and complete a quiz

Select the best answers for each of the four “stations” and write

them on your paper

Check your answers to the warm-up

Station 1: Check your answer

The cell is the fundamental unit of life. The materials and objects listed in the probe that are made up of cells are the following:

flowers, skin, bone, lungs, hamburger, apples, leaf, worms, bacteria, seeds, paramecium, blood, and mushrooms.

Station 2: Check your answerPlants only: photosynthesisAnimals only: Acquire and take in food from the environment

All others are both plants and animals: Respiration (release energy from food)

Cell division, Reproduction, Growth

Elimination of waste products, Storage of energy

Transport of materials within the organism

Maintain a stable, internal environment

Station 3: Check your answer

Which are larger than cells? Although some of the choices depend on the size of a small object, the best choices are:

thickness of a leaf, grain of salt, eye of an ant,

width of a hair, piece of sawdust, tiny seed,

bread crumb, larva of a tiny fruit fly, speck of pepper,

period at end of a sentence, dust mite,

frog embryo, point of a pin, and flea egg.

Station 4: Check your answer

Which statement best describes the two groups:

The best answer is: D—Group A is made up of cells and atoms; Group B is made up of atoms.

(Note: Students who choose answer B—Both groups are made of atoms—are correct. However, that would not be the best way to describe the two groups in order to differentiate between them.)

The Cell Membrane and Homeostasis

What is the cell membrane? A quick review to write on your paper

A. The cell membrane is the outside layer of the cell, it is the skin of the cell

B. The cell membrane (also called the plasma membrane) controls what enters and exits the cell

C. The cell membrane is made mostly of a phospholipid bilayer, with proteins throughout as well.

The Cell Membrane• Cell membrane is made mostly of 2 main organic

molecules: lipids and proteins

• The cell membrane allows only certain molecules to pass through while stopping others from passing through.

Other Names:-Plasma Membrane-Phospholipid bilayer =

Phospholipid= type of lipidBilayer= 2 layers

-Semi-permeable=-Semi= partial-Permeable= allowing access

The Cell MembraneCarbohydrates (for identification)

Lipids Proteins

Cell Membrane Composition

• Phospholipid Bilayer (lipid bilayer)– 2 layers of lipids

• Proteins are embedded in the bilayer

• Carbohydrate chains are attached to the proteins

• So many kinds of molecules =

FLUID MOSAIC MODEL

The Membrane is very flexible because of the fatty acid chains and the membrane has all of the structures listed inside of it so we call it a “Fluid Mosaic Model”

Fluid because it is constantly flowingMosaic because it has lots of different things in it

Cell Membrane Properties/Functions

• Selectively permeable = only certain molecules can free pass across the membrane

– Only small, uncharged, polar molecules can pass freely

• E.g. Water, carbon dioxide, oxygen

– Large molecules and ions are impermeable = they can’t cross freely

• E.g. Glucose, Ca2+

Protein Function in Cell Membrane

1. Surface Proteins – receptors that provide binding sites for hormones (chemical messengers)

2. Transport Proteins – help transport large molecules or ions across the membrane

Carbohydrate Function in Cell Membrane

• Serves as identifiers allowing individual cells to identify one another

balancepH temperature salt

constantly in outdifference amount molecules

membranecell

HOMEOSTASIS!!!Staying in check!

Cellular Transport

• Cellular transport-maintains homeostasis in the cell

Match the Organelle with its Job!1. Cell membrane A. Controls what goes in & out

2. Cell wall B. Storage

3. Nucleus C. Makes ATP

4. Ribosome D. Offers protection

5. Mitochondria E. Makes Glucose

6. Chloroplast F. Contains DNA, control center

7. Vacuole G. Makes proteins

Match the Organelle with its Job!: Check your Answers

1. Cell membrane

2. Cell wall

3. Nucleus

4. Ribosome

5. Mitochondria

6. Chloroplast

7. Vacuole

A. Controls what goes in & out

B. Storage

C. Makes ATP

D. Offers protection

E. Makes Glucose

F. Contains DNA, control center

G. Makes proteins

Cell Transport stuff

Cell Transport

• Materials move in/out of cells through the cell membrane

• The cell membrane is SELECTIVELY PERMEABLE

Types of Cell Transport

Passive Cell Transport

• Does NOT require energy

• Movement DOWN the concentration gradient

• High Concentration Low Concentration

Active Cell Transport

• Requires ATP (energy)

• Movement AGAINSTthe concentration gradient

• Low Concentration High Concentration

Diffusion

• Movement of molecules from a high to low concentration

• Example: Oxygen is moved from a high concentration in

the lungs, to a low concentration in the blood

Diffusion example

Osmosis

• Movement of WATER molecules from a high to low concentration

• Example: Cells will swell (grow) when put in fresh water, and

will shrink when placed in salt water

Equilibrium

Molecules move until they reach EQUILIBRIUM:

An equal concentration on both sides of the membrane

Quick Review:1. Diffusion moves substances from _____ to

_____ concentration.

2. Diffusion moves ______ a concentration gradient.

3. The U-shaped tube in the figure below is divided by a membrane that is impermeable to starch but permeable to water. In what direction will water move?

Check your answers:1. Diffusion moves substances from HIGH to

LOW concentration.

2. Diffusion moves ALONG/DOWN/WITH a concentration gradient.

3. The U-shaped tube in the figure below is divided by a membrane that is impermeable to starch but permeable to water. In what direction will water move?

From left to right

Passive Transport

Facilitated Diffusion: The movement of large molecules through the

membrane through a transport protein.

Active Transport

The type of transport that requires Energy

Active Transport---uses ATP (energy)

Movement of particles AGAINST the concentration gradient (from small amount to bigger concentration)

Quick Review:

Which cell process will move substances against a concentration gradient?

A diffusion

B facilitated diffusion

C osmosis

D active transport

Transport

Passive

Type What

does it

move?

What

direction

does it

move?

Does it

use

energy?

Does it

use a

protein?

Diffusion

Osmosis

Facilitated

Diffusion

Active Active

Transport

SmallParticles

High to low conc.

No No

WaterHigh to low conc.

No No

LargeParticles

High to low conc.

No Yes

ParticlesLow to high conc.

Yes Yes

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 LOW

Moves from

LOW to HIGH

Needs a protein

Needs energy

Moves particles

Moves water

X X X

X

X X

X

X X X

X

Movement across

membranes can be

Which results in

Can be

which requires which requires

and a

In order to move particles

from a region of

to a region of

The three types are…

They move particles from a region of

to a region of

Osmosis Simple Diffusion Facilitated Diffusion

No energyEnergy

Active Passive

High Concentration

Low Concentration Dynamic Equilibrium

Low Concentration

High Concentration

Transport Protein

Match the terms to their definition:1. Diffusion of water across a membrane, such as a cell wall 2. Movement of a molecules from an area of high concentration to an area of low concentration3. Condition in which molecules of a substance are spread evenly throughout a space4. Describes a cell membrane that allows some materials to pass through freely but not others 5. Movement of materials across a cell membrane that requires the use of energy6. Movement of materials across a cell membrane without the use of energy

A. Active TransportB. DiffusionC. EquilibriumD. OsmosisE. Passive TransportF. Selectively Permeable

Hopefully you matched these correctly:Osmosis- Diffusion of water across a membrane, such as a cell wall Diffusion- Movement of a molecules from an area of high concentration to an area of low concentrationEquilibrium- Condition in which molecules of a substance are spread evenly throughout a spaceSelectively Permeable- Describes a cell membrane that allows some materials to pass through freely but not others Active Transport- Movement of materials across a cell membrane that requires the use of energyPassive Transport- Movement of materials across a cell membrane without the use of energy

Using what you’ve learned, go to https://join.quizizz.com

and play the game 858467

You can take the quiz twice.

Practice Time: Use the information you’ve learned to

complete the stapled page

Turn this paper in once you finish to receive credit for your

work.

If you didn’t finish the online textbook the other day: 1. Please get your Chromebook, login and go to my.ncedcloud.org and login

2. Click Canvas, Click on Biology I

3. Click Home (on the left), Click on ConnectEd (McGraw Hill)

• Pop up blocker might stop this, you need to click “always allow…” from the pop up blocker, then reload the home screen

4. Click on “Launch” or the textbook

5. On the right hand side click on LS (Learn Smart). If there is no LS, then click on “resources”

6. Click on the blue Learn Smart box and then click on your class period.

• If it asks for a name, you can click cancel. You might have to click through the tutorial before you start.

7. Whatever chapters we’re working on will show on the screen. If you have more than one chapter, let Mr. Shimko know.

8. Click on “7 Cellular Structure and Function,” then click on “Practice” in the bottom left and answer the questions.

9. When you complete the reading, make sure it is says completed.