Chapter 6 How Cells Harvest Chemical Energy

  Happy Halloween !!

All play and no work makes Jack a .................   : |

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 Below is a picture of the mitochondrion:

 (SA - volume ratio is surface area

                                                                                                       volume ratio)

Chapter 5 Multiple Choice Test

Chapter 5 Packet

Chapter 5 Packet will be graded.

After grading the packet, I will share information read about why some people are "fearless" while others are crippled by fear.

Permeability Lab

You will work in groups of 4 to test the permeability of the dialysis tubing.  You will use two different solutions to make a "cell". The dialysis tubing will represent the plasma membrane.

 

Phagocytosis, Endocytosis, Receptor Mediated Endocytosis

You will finish taking notes on the PowerPoint to end the chapter.  I will give additional information for the Permeability Lab tomorrow, and I will share with you information on:
1) Robotic Pills Replacing Injections
2) Vitamin Size Cameras to Reach Every Part of the Gut and
3) The Nobel Prize Awarded to scientist figuring out how the body know where to deliver the material.

Below is a video link with the details of what happens during Water Poisoning.  It is based on the real  case of the "Hold Your Wee for a Wii" story.  This video explains in details what happens inside the body. It also explains how the condition can be treated.

Video Link:  Water Poisoning

Facilitated Diffusion

You will take notes on facilitated diffusion, active transport, exocytosis, and endocytosis.

Click on the link to view video on membrane transport:
Transport in and out of the cell

Tonicity: hypertonic, hypotonic, and isotonic solutions

You will take notes and have a discussion on the topic of diffusion and osmosis..

The relative concentration of solutes dissolved in an aqueous solution which determines the extent and direction of flow of water.

Membrane separates two solutions with different sugar concentrations. Water molecules can pass through the membrane, but sugar molecules cannot.

The behavior of animal and plant cells in different osmotic environments.

 

 

Click on the links below to view real life example of water rushing into the cells, thus causing water poisoning.

Hold your Wee for a Wii 

 Court settlement for the water poisoning death

 

Water intoxication, also known as water poisoning, overhydration, or water toxemia is a potentially fatal disturbance in brain functions that results when the normal balance of electrolytes in the body is pushed outside safe limits by excessive water intake.  

Endurance sports

Marathon runners are susceptible to water intoxication if they drink too much while running. This is caused when sodium levels drop below 135 μmol/L when athletes consume large amounts of fluid. This has been noted to be the result of the encouragement of excessive fluid replacement by various guidelines. This has largely been identified in marathon runners as a dilutional hyponatremia.^[5] A study conducted on participants of the 2002 Boston Marathon found that thirteen percent finished the race with hyponatremia. The study concluded that the strongest predictor of hyponatremia ( low sodium levels in the blood) was weight gain while racing (over-hydration), and hyponatremia was just as likely to occur in runners who chose sports drinks as those who chose water.^[5] Medical personnel at marathon events are trained to suspect water intoxication immediately when runners collapse or show signs of confusion.

The information above explaining water intoxication was copied from Wikipedia.