Passive Transport Demonstrations

Today's Daily Question Came Directly Off of Study Island

We then did a couple different demonstrations.  The first was just to simply see the movement of water from high to low concentration.

We let those sit for a while as we took the next slide of notes

 

 
Before we moved to the next slide I had you take your "Kidney Cell" that was filled with simulated blood (it contains all the chemical components of our blood but is NOT actually animal blood) and place it in a cup of water.

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By the time you were finished with this slide most of your cups looked something like this.
This was showing you how cell membranes are SEMI permeable.  The membrane allowed urea and salts through
but they did not allow larger molecules such as red blood cells through (otherwise the water would have been red)
What you just made was simulated urine!

Cell membrane notes part 2 - Passive transport intro

And the notes!!

And then we watched a little of the Hank Green Video.  Demo's Tomorrow!!!

Cell Membrane Notes round 1

Tuesday we did not have daily questions - we moved right into notes on the cell membrane.
 (also known as the plasma membrane)

  

This was a slide from our unit on the "Characteristic of life"  I mentioned how this was an example of a feedback mechanism.

We watched the beginning of this podcast which gives a great analogy of a cell membrane and a musk ox?!?!

Intro to cell membrane and cell transport

Thursday and Friday of last week you did a general outline of the chapter we have started.

Monday we started with the following daily questions



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We then watched the following video that I stopped at multiple parts to show where we WERE in the cell (in the last chapter) and where we will be focusing on NOW (specifically in the cell membrane)

 

I paused the movie here to show you that this is the area between cells that is filled with fluid and shows how cells interact with each other via receptors.

I paused it AGAIN to show you that this bilayer is where we will be focusing during this next chapter.



"A Cell Is Like a" Presentation Day

Great Job today Presenting your projects!!  I am very impressed with your creativity when coming up with these analogies!!  On to the next topic tomorrow!!

 

****Don't forget to finish your study island questions for me!!!***

 



A cell is like a wrap up... chapter wrap up.... study island

Friday and Monday we had work days on our "A Cell is like a...." project.  Don't forget the posters and write ups are due to me Tomorrow!!!!
I also made available on Edline the Daily Question Quiz Exemption Form if you would like to be exempt from one of our daily question quizzes. 

I also made the 1st nine weeks extra credit available on edline and passed out hard copies of this on Monday. 

Today we wrapped up this chapter with some final daily questions and worked through Study Island questions.

Tuesday October 22^nd

Some disorders are caused by a lack of lysosomes in the cells of a particular tissue, what would result from this? (What would happen in the cell? – First look on your notes to see what lysosomes DO)

Since the role of lysosomes is to break down the "junk" in a cell, this will end up building up in cell causing it to become "toxic."  Many of the disorders I suggested for your extra credit assignment are lysosomal disorders.  Here is the abstract from a scientific article about lysosomal disorders.

 

 

"Many neurodegenerative diseases are characterized by the accumulation of undegradable molecules in cells or at extracellular sites in the brain. One such family of diseases is the lysosomal storage disorders, which result from defects in various aspects of lysosomal function. Until recently, there was little prospect of treating storage diseases involving the CNS. However, recent progress has been made in understanding these conditions and in translating the findings into experimental therapies. We review the developments in this field and discuss the similarities in pathological features between these diseases and some more common neurodegenerative disorders."

 

If the Golgi apparatus was out of order in a cell, what would the direct result of that be regarding protein production and transportation? (First look in your notes to see what the golgi apparatus does)

If the Golgi apparatus went on strike - Proteins that were made on the Rough Endoplasmic reticulum would not be processed and transported out of the cell.   Here is another abstract from a scientific article about the link between Golgi apparatus malfunction and Alzheimer's

Abstract
Alzheimer’s disease is an irreversible, progressive neurodegenerative disorder leading invariably to death, usually within 7–10 years after diagnosis and is the leading cause of dementia in the elderly. Not only is Alzheimer’s disease a tragic disease in which people suffer from neurodegeneration in the years to come, it also becomes an incredible burden on the public health system. However, there is currently no effective treatment to halt the progression or prevent the onset of Alzheimer’s disease. This is partly due to the fact that the complex pathophysiology of Alzheimer’s disease is not yet completely understood. Recently, Golgi apparatus is found to play an important role in Alzheimer’s disease. In this review, we discuss the changes of Golgi apparatus during clinical progression and pathological development of Alzheimer’s disease. First, changes of Golgi apparatus size in Alzheimer’s disease are summarized. We then address the role of Golgi apparatus in the neuropathology of Alzheimer’s disease. Finally, the role of Golgi apparatus in the pathogenesis of Alzheimer’s disease is discussed. Understanding the contribution of Golgi apparatus dysfunction to Alzheimer’s disease and its pathophysiological basis will significantly impact our ability to develop more effective therapies for Alzheimer’s disease.

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Then you answered the questions on Study Island.  If you did not finish those today in class, I ask that you complete that by Friday.

 

Organelles wrap up and project brainstorming time

Daily Questions – Thursday October 17^th

Studies of fat cells and thyroid cells show that fat cells have fewer mitochondria than thyroid cells. A biologist would most likely infer that fat tissue….

a. does not require energy

b. Has energy requirements equal to thyroid tissue

c. Requires less energy than thyroid tissue

d. Requires more energy than thyroid tissue.

After germination, continued plant growth pushes first the shoot and then the leaves through the soil.  We would expect the emergent leaf cells to contain many Chloroplast for photosynthesis.  Because the developing stem must support the plant, we would expect those cells to develop Cell Walls

I had you write two more slides of notes today about cilia and flagella before you started working on your "A Cell is Like a....." Project.

 
I then handed out the guidelines for the project and had you get to brainstorming!!! 

 I LOVED what I was hearing from you guys as you worked through your analogies.  Some of the analogies I heard were A cell is like a: Football team, Snow Mobile, Softball Team, School, House, Army.....
 
Great Start guys!!  You will continue working through the analogy tomorrow after the DQQ

Wrap up of organelles - Intro to project

Today's Daily Questions allowed us to have a great conversation about what was wrong about all the wrong answers here.  You guys did a great job telling me what made each wrong statement incorrect.  Here is a basic summary of what we came up with for the daily questions.

 

 



We then finished up our notes on the different organelles in preparation for the "A Cell is like a ....." Project.  Tomorrow you will begin to collaborate with your classmates on coming up with your own analogy to explain the parts of a cell!.  Here's what we finished up with today.

 Below are a couple videos that are a great wrap up of the different parts of a cell if there are any that you are still unsure about.