Friday, March 11, 2016
Thursday, March 10, 2016
8.3 Cell Communication
Space News!
(Last class you should have finished the Egg Lab)
Check for completion of 8.2 Worksheet; should be glued into notebook
8.3 Cell Communication (new right hand page)
Learning Objective: I can describe how cells communicate and coordinate activities.
-Cells depend on the activities of other cells to survive, so communication between cells is critical.
-Cells use various methods of communication depending on whether the target is nearby or far away.
-Neighboring cells communicate over short distances through direct contact with their membranes.
-Long distance signals are carried by hormones & nerve cells
-Some signals come from the environment, outside the body. For example, light effects the action of hormones in plants and determines when some flower.
-Receptor proteins in the cell membrane receive hundreds of signals, but respond to only those important to its function.
(Last class you should have finished the Egg Lab)
Check for completion of 8.2 Worksheet; should be glued into notebook
8.3 Cell Communication (new right hand page)
Learning Objective: I can describe how cells communicate and coordinate activities.
-Cells depend on the activities of other cells to survive, so communication between cells is critical.
-Cells use various methods of communication depending on whether the target is nearby or far away.
-Neighboring cells communicate over short distances through direct contact with their membranes.
-Long distance signals are carried by hormones & nerve cells
-Some signals come from the environment, outside the body. For example, light effects the action of hormones in plants and determines when some flower.
-Receptor proteins in the cell membrane receive hundreds of signals, but respond to only those important to its function.
Tuesday, March 8, 2016
Finish Egg Lab writeup; do 8.2 worksheets
Finish Egg Lab and get a check for completion when done!
(15 minutes tops to work on finishing this); Period 7 is done
EGG OSMOSIS DEMONSTRATION
PREDICTION
1. What do you expect to happen to the eggs soaked in corn syrup and water? I predict that the egg soaked in corn syrup will______ because ______. I predict that the egg soaked in water will _______ because______.
ANALYSIS
2. What changes did you observe in the egg after soaking in vinegar?
3. What caused the change in the mass of the egg after soaking in corn syrup?
4. What caused the change in the mass of the egg after soaking in water?
5. Which egg was in a hypertonic solution? Explain.
6. Which egg was in a hypotonic solution? Explain.
CRITICAL THINKING
7. What would happen to a red blood cell placed in a test tube of distilled (pure) water? Explain.
(Period 7 start here) To see OSMOSIS in action...watch video explaining egg lab
Notes...
(new right hand side, you will glue a worksheet over them OR you can take these notes on a new left hand side at the top, leaving room for processing below them)
-Cells must move substances of varying size, electrical charge, and composition into and out of the cell in order to maintain homeostasis, and they do this in a variety of ways.
Passive Transport
- no energy required
-includes simple diffusion, facilitated diffusion, & osmosis.
-analogy: paddling downstream in a kayak
Active Transport
-requires energy to pump substances against their concentration gradient
-includes the sodium-potassium pump and vesicles through the process of endocytosis and exocytosis
(review SciShow video here, start at 6:19 and stop at 10:00)
-analogy: paddling upstream in a kayak
Then do worksheets 8.2 Cell Transport and glue on right hand side across from notes.
Update table of contents and do left side color processing for Egg Lab and 8.2 Worksheet with any remaining time.
Chapter 8 Test will be the week before Spring Break!
(15 minutes tops to work on finishing this); Period 7 is done
EGG OSMOSIS DEMONSTRATION
PREDICTION
1. What do you expect to happen to the eggs soaked in corn syrup and water? I predict that the egg soaked in corn syrup will______ because ______. I predict that the egg soaked in water will _______ because______.
| EGG OSMOSIS DATA |
Egg A
|
Egg B
|
Egg C
|
Day 1 - Mass with shell
| |||
Day 2 - Mass without shell
| |||
Solution added to egg
| corn syrup | water | control |
ANALYSIS
2. What changes did you observe in the egg after soaking in vinegar?
3. What caused the change in the mass of the egg after soaking in corn syrup?
4. What caused the change in the mass of the egg after soaking in water?
5. Which egg was in a hypertonic solution? Explain.
6. Which egg was in a hypotonic solution? Explain.
CRITICAL THINKING
7. What would happen to a red blood cell placed in a test tube of distilled (pure) water? Explain.
(Period 7 start here) To see OSMOSIS in action...watch video explaining egg lab
-Cells must move substances of varying size, electrical charge, and composition into and out of the cell in order to maintain homeostasis, and they do this in a variety of ways.
Passive Transport
- no energy required
-includes simple diffusion, facilitated diffusion, & osmosis.
-analogy: paddling downstream in a kayak
Active Transport
-requires energy to pump substances against their concentration gradient
-includes the sodium-potassium pump and vesicles through the process of endocytosis and exocytosis
(review SciShow video here, start at 6:19 and stop at 10:00)
-analogy: paddling upstream in a kayak
Then do worksheets 8.2 Cell Transport and glue on right hand side across from notes.
Update table of contents and do left side color processing for Egg Lab and 8.2 Worksheet with any remaining time.
Chapter 8 Test will be the week before Spring Break!
Friday, March 4, 2016
Finish Egg Lab
WARM UP (3/4/16)
Use vocabulary terms we've learned so far to explain the following situations:
1. Explain what would happen if you give someone an IV of pure water.
2. Explain what would happen if you place a saltwater fish in pure water.
3. Explain what happens when salt is dumped on a slug.
Define:
4. __________ is the term used to describe the shrinking of the cytoplasm away from the cell wall due to the outward osmotic flow of water.
PREDICTION
1. What do you expect to happen to the eggs soaked in corn syrup and water? I predict that the egg soaked in corn syrup will______ because ______. I predict that the egg soaked in water will _______ because______.
ANALYSIS
2. What changes did you observe in the egg after soaking in vinegar?
3. What caused the change in the mass of the egg after soaking in corn syrup?
4. What caused the change in the mass of the egg after soaking in water?
5. Which egg was in a hypertonic solution? Explain.
6. Which egg was in a hypotonic solution? Explain.
CRITICAL THINKING
7. What would happen to a red blood cell placed in a test tube of distilled (pure) water? Explain.
Use vocabulary terms we've learned so far to explain the following situations:
1. Explain what would happen if you give someone an IV of pure water.
2. Explain what would happen if you place a saltwater fish in pure water.
3. Explain what happens when salt is dumped on a slug.
Define:
4. __________ is the term used to describe the shrinking of the cytoplasm away from the cell wall due to the outward osmotic flow of water.
PREDICTION
1. What do you expect to happen to the eggs soaked in corn syrup and water? I predict that the egg soaked in corn syrup will______ because ______. I predict that the egg soaked in water will _______ because______.
| EGG OSMOSIS DATA |
Egg A
|
Egg B
|
Egg C
|
Day 1 - Mass with shell
| |||
Day 2 - Mass without shell
| |||
Solution added to egg
| corn syrup | water | vinegar (control) |
ANALYSIS
2. What changes did you observe in the egg after soaking in vinegar?
3. What caused the change in the mass of the egg after soaking in corn syrup?
4. What caused the change in the mass of the egg after soaking in water?
5. Which egg was in a hypertonic solution? Explain.
6. Which egg was in a hypotonic solution? Explain.
CRITICAL THINKING
7. What would happen to a red blood cell placed in a test tube of distilled (pure) water? Explain.
Wednesday, March 2, 2016
Osmosis; Begin Egg Osmosis Demo; Hypo/Hyper/IsoTonic drawings here
WARM UP: (left side)
1. What are the two types of transport that cells use?
2. Why is the movement of substances across cell membranes so important?
Science News: Space Travel!
Last time: We watched 'In Da Club - Membranes & Transport' SciShow video in which Hank describes how cells regulate their contents and communicate with one another via mechanisms within the cell membrane.
(new right hand page) OSMOSIS 3/2/16
-Water can diffuse across a selectively permeable membrane in a process called osmosis. Osmosis is a type of passive transport that is very important to keeping cells functional.
Osmosis allows cells to maintain water balance as their environment changes.
-Water has a tendency to move to areas with a high solute concentration.
-Low H2O = High Solutes
-Solutions can be:
hypertonic - if a solution is hypertonic, or has a higher concentration of solutes than the cytoplasm of the cell does, water moves out of the cell. The cell loses water and shrinks.
hypotonic - if a solution is hypotonic, or has a lower solute concentration than the cytoplasm of the cell does, water moves into the cell. The cell gains water and expands in size.
isotonic - if a solution is isotonic, or has the same solute concentration than the cytoplasm of the cell, water diffuses into and out of the cell at equal rates since it is at equilibrium. The cell stays the same size.
Here's the drawing we did in class as well: HYPO/ISO/HYPTERTONIC
-I love this! Amoeba Sisters Video - Osmosis: A Solute & Solvent Love Story
To see OSMOSIS in action... video
Begin Egg Osmosis Demonstration (new right hand page)
1. What are the two types of transport that cells use?
2. Why is the movement of substances across cell membranes so important?
Science News: Space Travel!
Last time: We watched 'In Da Club - Membranes & Transport' SciShow video in which Hank describes how cells regulate their contents and communicate with one another via mechanisms within the cell membrane.
(new right hand page) OSMOSIS 3/2/16
-Water can diffuse across a selectively permeable membrane in a process called osmosis. Osmosis is a type of passive transport that is very important to keeping cells functional.
Osmosis allows cells to maintain water balance as their environment changes.-Water has a tendency to move to areas with a high solute concentration.
-Low H2O = High Solutes
-Solutions can be:
hypertonic - if a solution is hypertonic, or has a higher concentration of solutes than the cytoplasm of the cell does, water moves out of the cell. The cell loses water and shrinks.
hypotonic - if a solution is hypotonic, or has a lower solute concentration than the cytoplasm of the cell does, water moves into the cell. The cell gains water and expands in size.
isotonic - if a solution is isotonic, or has the same solute concentration than the cytoplasm of the cell, water diffuses into and out of the cell at equal rates since it is at equilibrium. The cell stays the same size.
Here's the drawing we did in class as well: HYPO/ISO/HYPTERTONIC
-I love this! Amoeba Sisters Video - Osmosis: A Solute & Solvent Love Story
To see OSMOSIS in action... video
Begin Egg Osmosis Demonstration (new right hand page)
| EGG OSMOSIS DATA |
Egg A
|
Egg B
|
Egg C
|
Day 1 - Mass with shell
| |||
Mass without shell
| |||
Mass in solution
|
Monday, February 29, 2016
8.2 Cell Transport
Turn in VIRTUAL Inquiry Lab: Salty Cells & review
Revisit the live video of red onion cells in different solutions.
(Here is another video that may be helpful for viewing cells.)
What you observed happening when salt water was added was called plasmolysis - shrinking of the cytoplasm away from the wall of a living cell due to outward osmotic flow of water (write definition on page with Salty Cells lab)
Announcements:
Spring Break: 3 weeks away!
Tutorial Thursday, assembly Friday
Midterm Progress Reports go out tomorrow
End Q3 is Thurs 4/7; Bio Honors due week of 3/28-4/1
8.2 Cell Transport
Learning Objective:
I can describe the different ways that cells move substances across their membrane.
Define the following vocabulary terms:
1. passive transport
2. equilibrium
3. concentration gradient
4. diffusion
5. carrier protein
6. osmosis
7. active transport
8. sodium-potassium pump
9. endocytosis
10. exocytosis
Watch SciShow Membranes & Cell Transport (12 min)
Revisit the live video of red onion cells in different solutions.
(Here is another video that may be helpful for viewing cells.)
What you observed happening when salt water was added was called plasmolysis - shrinking of the cytoplasm away from the wall of a living cell due to outward osmotic flow of water (write definition on page with Salty Cells lab)
Announcements:
Spring Break: 3 weeks away!
Tutorial Thursday, assembly Friday
Midterm Progress Reports go out tomorrow
End Q3 is Thurs 4/7; Bio Honors due week of 3/28-4/1
8.2 Cell Transport
Learning Objective:
I can describe the different ways that cells move substances across their membrane.
Define the following vocabulary terms:
1. passive transport
2. equilibrium
3. concentration gradient
4. diffusion
5. carrier protein
6. osmosis
7. active transport
8. sodium-potassium pump
9. endocytosis
10. exocytosis
Watch SciShow Membranes & Cell Transport (12 min)
Thursday, February 25, 2016
Virtual Lab: Salty Cells
Happy Thursday! Tutorial today - come see me in C13 :)
I will come around to check for completion of 8.1 worksheet & processing as you work on the WARM UP below...
WARM UP: (left side)
1. What is homeostasis?
2. How does the cell membrane play a role in maintaining the homeostasis of a cell?
-Review answers to 8.1 worksheet
-VIRTUAL Inquiry Lab: 'Salty Cells'
-What would happen if we apply salt water to the cells of a plant?
-Learning Objective: I can examine a plant cell's response to a change in the cell's environment.
Work in pairs with a personal electronic device to observe a live video of onion cells
Another video to help demonstrate: here
I will come around to check for completion of 8.1 worksheet & processing as you work on the WARM UP below...
WARM UP: (left side)
1. What is homeostasis?
2. How does the cell membrane play a role in maintaining the homeostasis of a cell?
-Review answers to 8.1 worksheet
-VIRTUAL Inquiry Lab: 'Salty Cells'
-What would happen if we apply salt water to the cells of a plant?
-Learning Objective: I can examine a plant cell's response to a change in the cell's environment.
Work in pairs with a personal electronic device to observe a live video of onion cells
Another video to help demonstrate: here
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