warm-up sept. 19 #16 sketch the following cell and label as many parts as you can
TRANSCRIPT
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Warm-Up Sept. 19 #16
• Sketch the following cell and label as many parts as you can.
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Review!!Yes, you need to write all of the organelles names and function
• Match the cell organelle with the correct function
• 1. Mitochondria• 2. Chloroplast• 3. Cell Membrane• 4. Ribosomes• 5. Endoplasmic
Reticulum• 6. Golgi Body• 7. Lysosomes• 8. Vacuole
A. digestion B. protein synthesis C. regulates what enters and
leaves the cell D. packages E. Storage F. Energy (Respiration) G. Photosynthesis H. Synthesize lipids and
proteins, transport, and communicate
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Warm-up march 5
Passive Transport • movement of molecules
across the membrane from high to low concentration.
• Molecules move WITH the concentration gradient
• NO ENERGY REQUIRED!
Active Transport• movement of
molecules across the membrane from low to high concentration.
• Molecules move AGAINST the concentration gradient
• ENERGY REQUIRED!
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Warm-up 9/21 • Structure and Function of the cell membrane
– The cell membrane is a phospholipid bilayer that is SELECTIVELY PERMEABLE, this means it regulates what enters and leaves the cell
sketch the diagram, label the proteins and phospholipids
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Unit 2.2 – Cell Homeostasis
Cells are the basic unit of life therefore they must eat, breathe, excrete and maintain homeostasis (balanced internal conditions). To do these things, cells must transport substances across their membrane to regulate life processes to stay alive!
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Cell Transport: -- Moving substances a cell needs in and letting wastes out of the cell; this can occur PASSIVELY or ACTIVELY
• Cell Membrane: The barrier that surrounds ALL cells. It is a phospholipid bilayer AND is selectively permeable.
inside cell
outside cell
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Proteins act like doors in the cell membrane!
• Pores: SMALL holes that allow certain things to cross the membrane
• Transport Proteins: proteins specifically shaped to move large things in and out
protein channelsin bi-lipid membrane
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Protein channels
• Proteins act as doors in the membrane– channels to move specific molecules through cell
membrane
HIGH
LOW
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Passive Transport: movement of molecules across the membrane from a high to low concentration. NO ENERGY REQUIRED!
Examples: Diffusion of water Diffusion (Osmosis)
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• Diffusion: the spreading out of molecules from high concentration to low concentration– Is possible because molecules are always
randomly moving and colliding– No energy required because molecules are
moving WITH the concentration gradient– When the molecules are spread throughout the
space evenly, this is called EQUILIBRIUM.
Osmosis Animation
Diffusion is how our lungs take in oxygen and get rid of carbon dioxide wastes
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• Diffusion depends on a Concentration Gradient:
• A concentration gradient is the difference in the concentration of a substance on two sides of a permeable barrier– Concentration is the amount of substance present in a mixture or solution
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• Osmosis: the movement of WATER across a membrane from high to low concentration– Osmosis is PASSIVE transport-
NO energy is used. – Water molecules are found
on both inside and outside the cell, WATER moves from a high to low concentration.
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• A solution is composed of a solute and a solvent. The solute is what is dissolved in the solvent. For osmotic solutions, the solvent is always water. The solutes are usually salt or sugar.
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Another Example of Osmosis
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Warm-up 9/24 #19
DiffusionMovement of
molecules from high to low concentration
Example of Passive Cell transport
OsmosisMovement of water
from high to low concentration
Example of Passive Cell transport
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• To determine how a cell will react you must:– First- Look at how much solute is dissolved in the water on either side
of the cell. • Second- Find the side with the most water and least amount of solute.
Water will flow ‘downstream’ from there (high to low).
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3. Real-life EXAMPLES of osmosis:
• Plants use osmosis to take in water they need for photosynthesis
• If you pour salt on a slug water diffuses out of the slug and causes it to shrink
• Vegetables in the grocery store are sprayed with water to keep them crisp
• Kidney dialysis for patients with kidney disease– A dialyzer removes waste products from a
patient's blood through a semi-permeable membrane, and passes them into the dialysis solution tank. The red blood cells being larger in size cannot pass through the membrane and are retained in the blood. Thus, by the process of osmosis waste materials are continuously removed from the blood. Plants use osmosis to take in water they need for photosynthesis
• If you pour salt on a slug water diffuses out of the slug and causes it to shrink
Draw arrows to show what will happen to the cell below.
95% water
5% salt
Solution around the cell:
85% water
15% salt
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• Factors that affect cell transport include: • Amount of solute across the membrane
(concentration gradient)• temperature (higher temperatures=faster
diffusion)
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Cell Adaptations for survival in a FRESHWATER environment:
• A cell that lives in freshwater, like a protist called PARAMECIUM is surrounded by HIGH concentration of water. This means water is constantly moving INTO their cells which could be a problem. The ADAPTATION they have is called a CONTRACTILE VACUOLE. This allows them to pump out excess water.
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Cell Adaptations for survival in a SALTWATER environment:
• An organism that lives in a saltwater environment is always in a LOW concentration of water and is constantly losing water. ADAPTED by being able to take up water (drink the salt water and can eliminate excess salt through their gills)
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Keeping water balance• Cell survival depends on balancing water
uptake & water lossfreshwater balanced saltwater
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Warm-up Sept. 25 #20
• Copy the EOC practice question and the CORRECT answer. Draw a picture to show what is happening.
EOC practice• Placing wilted lettuce in cold water will make it crisp again. Which
statement best describes what happens to restore the lettuce to itsoriginal condition?
A Water left the lettuce cells by diffusion.B Water entered the cells of the lettuce by osmosis.C Osmosis caused salts to enter the
lettuce cells.D Salts in the leaf caused water to leave the cells.
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Ticket Out the Door
• 1. Explain WHY the water left the cell when you placed salt water solution on it.
• 2. If solute concentration was high inside the cell and low outside the cell, what would happen?
• 3. Why do grocery stores constantly spray their vegetables with water? Use your science vocabulary.
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• Active Transport: when molecules are moved from low to high concentrations (against concentration gradient)
REQUIRES ENERGY!! • Example: Sodium-
Potassium Pump – 3 sodium pumped out and 2 potassium pumped inside
http://www.wisc-online.com/objects/ViewObject.aspx?ID=AP11203
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Examples of Active Transport• digestion of food in the small
intestine. Carbohydrates are broken down into simple sugars such as glucose. The glucose is absorbed by active transport into the villi, to be passed into the bloodstream and taken around the body.
• Phagocytosis (cell-eating), pinocytosis (cell drinking)
http://www.bbc.co.uk/schools/gcsebitesize/science/add_ocr_pre_2011/homeostasis/importancerev6.shtml
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Active Transport Animation
http://programs.northlandcollege.edu/biology/Biology1111/animations/active1.swf
http://www.bbc.co.uk/schools/gcsebitesize/science/add_ocr_pre_2011/homeostasis/importancerev6.shtml
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Cell Transport summary
simplediffusion
facilitateddiffusion
activetransport
ATP
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Ticket Out the Door (Honors)1. ___________ is the movement of molecules from high to low
concentration. 2. Anything coming into or leaving a cell must pass through the
______________. 3. ___________ is the movement of WATER from a high to low
concentration. 4. Passive cell transport is when things move in our out of the cell with
the concentration gradient and does not require ___________. 5. ___________ cell transport is when things move from low to high
AGAINST the concentration gradient and this requires energy.6. A cell contains MORE salt than its environment. Salt CANNOT pass
through the membrane. The cell will __________. 7. What will happen to the cells of a freshwater fish if it is placed into
salty seawater?8. A red blood cell contains .25% salt and its surrounding environment
contains .35% salt. What will happen to this cell?
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Ticket out the door
• Sketch the following example and draw what will happen to the water level.– Explain WHY this is
happening. • A paramecium is an aquatic
unicellular organism that pumps water out. Is this active or passive transport and WHY?
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Flashcard Warm-Up
• Define the word
Producer.
• Write a synonym for the word producer.
• What process takes place within the chlorplasts of producers?
• Explain the role of a producer in a food web.
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Warm-up 9/26 #21Cellular Respiration
This process takes place in ALL living cells to create ENERGY in the form of ATP.
-takes place in the mitochondria-the chemical equation is the opposite of
photosynthesis
glucose + oxygen carbon dioxide+ water + energy
C6H12O6 O2 CO2 H2O ATP+ + +
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Energy production is vital for maintaining homeostasis:
• ATP : Adenosine triphosphate, the form of energy the form of energy ALL living cells use
• ATP has energy stored in the
chemical bonds between 3 phosphates – breaking phosphate releases energy– Energy is released when a bond is
broken
– Product : ADP + Phosphate
– Energy Recycled: More energy available to add 3rd phosphate
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make energy
A Body’s Energy Budget
eatfood
synthesis(building)
• energy needed even at rest
• activity• temperature
control{• growth• reproduction• repair{
storage• glycogen
(animal starch)• fat{
ATP1
2
3
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Warm-Up 9/27 #22
Respiration
• Write the chemical equation for cellular respiration.• The site of respiration in eukaryotic cells is the _____________,
which contains folded membranes for increased surface area.• Cells need energy for ________ transport, and other processes
such as ____________.• Two types of cellular respiration are:
– _________ if oxygen is available – _________ if NO oxygen is available
• A working muscle recycles over 10 million ATPs per second!!!
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Equation:C6H1206 + O2 CO2 + H2O + ATP (energy)
• Cellular Respiration: happens in ALL cells to get ENERGY
• Site of Respiration: in eukaryotic cells (BOTH plant and animal) – in the organelle mitochondria
The chemical equation is the opposite of photosynthesis
REACTANTS PRODUCTS
glucose + oxygen carbon dioxide+ water + energy
C6H12O6 O2 CO2 H2O ATP+ + +
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• Two Types of Cellular Respiration:• Aerobic Respiration: uses oxygen to break down
sugar, takes longer but makes LOTS of ATP• Gas Released: Carbon Dioxide (CO2)• (What organisms use the gas?) Producers turn CO2
and H2O into food•
glucose + oxygen carbon dioxide+ water + energy
C6H12O6 O2 CO2 H2O ATP+ + +
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• Anaerobic Respiration (also called FERMENTATION): when no oxygen is present – faster, but LESS ATP
• Sore muscles are a result of anaerobic respiration producing lactic acid .– Two Types of Anaerobic Respiration: Alcoholic fermentation: used by
plants, fungi, bacteria. Makes CO2, H2O and ATP, but also alcohol– Lactic Acid fermentation: used by SOME animal cells, makes CO2,
H2O and ATP, but also lactic acid
It is produced by adding a "starter" of active yogurt containing a mixed culture of Lactobacillus bulgaricus (or occasionally L. acidophilus ) and Streptococcus thermophilus. These produce lactic acid during fermentation of lactose.
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Respiration Flow Chart• Take all of the colored pieces in your bag and map
out the process of RESPIRATION• Think about how the food we eat (not all of it) is
broken down and SOME (glucose) are sent to the mitochondria to go through the process of respiration (what is required, what is made)
• Then, you and your partner will cut the pieces out from the copy provided and cut and paste to make a flow chart and EXPLAIN using connecting words as you go (DO NOT PASTE THE COLORED PICTURES)
• TURN IN! Make sure both names are on the final product
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Example of a photosynthesis Flow chart
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Warm-up Sept. 23 # 20
• Photosynthesis– Plants are also called autotrophs or producers. They use energy from the Sun and convert carbon
dioxide and water into CHEMICAL energy (sugar) and release
oxygen
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Equation:
• How does energy from the sun become energy for life?
• Photosynthesis: happens in producers to get food
• Site of Photosynthesis: in plant/plant-like cells – in the organelle chloroplast
• Pigment: chlorophyll absorbs light to make food
REACTANTS PRODUCTS
NO DIRECT ENERGY MADE!!
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• Gas Released: oxygen • Food: glucose (sugars
made)• Stored: as starch in the
vacuole or in parts of plants (roots, stems)
• Reason: Will be later used in Cellular Respiration or eaten by animals
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3 Factors that Affect Photosynthesis
1- Temperature 2-Amount of carbon dioxide
3-Amount of sunlight
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Ticket out the door• Sketch the following example and fill in the
boxes.
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QuizDiffusion energy (ATP) mitochondriaOsmosis cell membrane shrinkSwell stay the same ActiveSugar oxygen carbon dioxide
1. ___________ is the movement of molecules from high to low concentration. 2. Anything coming into or leaving a cell must pass through the ______________.
3. ___________ is the movement of WATER from a high to low concentration. 4. Passive cell transport is when things move in our out of the cell with the
concentration gradient and does not require ___________. 5. ___________ cell transport is when things move from low to high AGAINST the
concentration gradient and this requires energy.6. A cell contains MORE salt than its environment. Salt CANNOT pass through the
membrane. The cell will __________. 7. What will happen to the cells of a freshwater fish if it is placed into salty
seawater?8. The goal of photosynthesis is for plants to make ___________.9. Water, sunlight and ________________ are needed for photosynthesis to occur. 10. The gas RELEASED as a waste PRODUCT of photosynthesis is ___________.
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2009-2010
ATP
What is energy in biology?
Whoa! HOT stuff!
Adenosine TriPhosphate
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How are they connected?
glucose + oxygen carbon + water + energydioxide
C6H12O6 O2 CO2 H2O ATP+ + +
Respiration
Photosynthesis
CO2 H2O C6H12O6 O2lightenergy + ++
glucose + oxygencarbondioxide
sunenergy+ water +
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H2O
Energy cycle
Photosynthesis
Cellular Respiration
sun
The Great Circleof Life!Mufasa?
glucosesugars
O2CO2
plants
animals, plants
ATP
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H2O
Another view…
Photosynthesis
Cellular Respiration
sun
organicmoleculesfood
O2CO2
producers, autotrophs
consumers, heterotrophs
synthesis
capturelight energy
digestion
releasechemical energy ATP
wastewastewaste
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CO2 + H2O + heatfuel(carbohydrates)
O2
“Burn fuels” to make energycombustionmaking heat energy by burning fuels in one step
ATP
ATP + CO2 + H2O (+ heat)
aerobic respirationmaking ATP energy (& some heat) by burning fuels in many small steps
food(carbohydrates)
O2
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Energy needs of life• Animals are energy consumers
– What do we need energy for?• synthesis (building for growth)• reproduction• active transport• movement• temperature control (making heat)
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What do we need to make energy?• The “Furnace” for making energy
– mitochondria • Fuel
– food: carbohydrates, fats• Helpers
– oxygen– enzymes
• Product– ATP
• Waste products– carbon dioxide
• then used by plants– water
O2
food
ATP
Make ATP!Make ATP!All I do all day…And no oneeven notices!
enzymes
CO2 H2O
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The poetic perspective• All of the solid material of every plant
was built out of thin air• All of the solid material of every animal was
built from plant material
Then all the cats, dogs, mice, people & elephants…are really strands of air woven together by sunlight!
sunair
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Ticket Out the Door
• 1. Where does cellular respiration take place in eukaryotic cells?
• 2. What is the most important product made at the end of respiration?
• 3. How is anaerobic respiration different from aerobic respiration?
• 4. How are photosynthesis and respiration related?
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Ticket out the door• Sketch the following cells and explain the relationship between photosynthesis and respiration.
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• 1. What are the needs of the plant for survival? • 2. What are the needs of the snail for survival?• 3. In what ways does the snail need the plant for survival? • 4. Does the plant need the snail for survival? Why or why
not? • 5. If you had to choose one as more important, which would
you pick and why?• 6. Describe how photosynthesis and respiration work together
to provide the needs of all organisms.• 7.Give at least TWO REASONS why photosynthesis and
respiration are often described as being the “opposite” of each other.
• a.• b.
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Factor Affecting Respiration
Height of Bag (mm)
None – Control Group
High (Hot) Temperature
Low (Cold) Temperature
Acidic (Low) pH
Basic (High) pH
Different Food Source (Starch not Sugar)No Food Source
DataEffect of Various Factors on Yeast
Respiration
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Big Unit Review
• Choose two vocabulary words that were not part of your assigned vocab and draw a picture for them.
• Choose three words and write a sentence with them.
• Create two questions of your own and answer ONE of them.
• Create a news headline and paragraph about a major topic from this unit.
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1st Period• Record your day 2 data in your data table• Acid present – YELLOW• Base present – PINK• Neutral- ORANGE
• If CO2 decreases, solution will turn pink.• If CO2 increases, solution will turn yellow
• Use your data to complete the analysis questions! Due tomorrow!
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Warm-up 9/28 #23• Relate the
processes of CELL TRANSPORT and Respiration to the following picture.
• Use words like, passive transport, active transport, diffusion, osmosis, water, nutrients, respiration and ATP, homeostasis
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Active and Passive Transport in Plants Videos
• EXPLAIN two examples other than your own from the videos viewed.
• Did you find any information to be inaccurate, if so EXPLAIN.
• Who had the best video explanation and WHY? Be specific!
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Honors Short Answer Essay• A radiologist is needed to perform a diagnostic
test to see what part of a patient’s brain was damaged by a stroke. Damaged brain tissue is a liability because those cells can release toxic chemicals that can kill surrounding brain cells. The diagnostic test examines how much oxygen the neurons (brain cells) are taking in. Explain how this test will help the neurosurgeon decide which parts of the brain to remove during surgery.
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