Cell membrane structure

In the picture you see above is all the parts of the cell membrane.
The cell membrane is the outer part of the cell that consists of a lipid ilayer with proteins embedded in it.
Phospholipid Bilayer

This area, the Phospholipid Bilayer sets the boundaries of a cell. The Phospholipid is composed of two lays of fat cells. Inside this layer it  consists of:

  The hydrophilic polar head which likes water and associates with water that is outside the cell. There is a positive charge towards the water and negative charges away from the water. The phospholipid molecule's polar head group contains a phosphate group. 

The Hydrophobic non-polar tails don't like water.  These tails are fatty acids.

Thes tails are a non-polar fat acid.

Integral  Proteins

These types of proteins are embedded into the bilayer of the membrane. The integral protein floats freely throughout the bilayer and turns into a transmembrane protein because it extends through the lipid bilayer. Each end comes into contact with the exterior. The integral protien is hydrophobic and made up of non-polar amino acids and the soon exposed ends of the integral protien are hydrophilic.

Other examples of integral membrane proteins are:

glucose premease

hormone receptors

ion channels and gates

Peripheral Proteins

Peripheral Proteins are attached to the exterior part of an integral protein that regulates cell signaling.

Oligosaccharides 

The oligosaccharides are the the starches and carbohydrates that are 
part of the exterior cell membrane.

This link below shows how all of this work in the cell membrane

http://www.susanahalpine.com/anim/Life/memb.htm

Plant Cell structure

http://popplet.com/app/#/143566

Black Widow

Black widows have shiney black body and measure to one-half inch to an inch in body length. A female has a marking the color of orange-red shaped hour glass on its belly. Males on the other had have more of a red hourglass marking but much smaller. A male widow is harmless, to where as a female is very venomus. It injects the victim with venom which is neurotoxins, then puts digestive juice which decomposes the skin. It makes it easier for the widow to feed, then sucks out the digestive juice  Facts:
-ledges, rocks, plants and debris, any place an acutally web can be. In the winter it can force spiders into buildings, home, etc..(habitat)
-black widows prey on insects by catching them inside their web.
-its preyed upon MUD-DAUBER Wasp

-”Latrodectus” is another name for a Black widow

-As newly hatched black widows they are white with black spots on the abdomen and have a cream colored hourglass. 

-Females after a two year life span they produce several egg sacs

http://library.thinkquest.org/C007974/2_4bla.htm
http://www.kidzworld.com/article/159-wild-things-bite-of-the-black-widow
http://www.calpoison.org/public/spiders.html#1
http://www.desertusa.com/july97/du_bwindow.html

http://ag.arizona.edu/maricopa/garden/html/t-tips/bugs/widow.htm

Enzyme Action Labs

Enzyme(# of yeast drops)

To start off, my class played a game to try and get a feel for what an enzyme action does. By having the enzymes chase the glucose and capture it each time and then later adding inhibitors and enzyme the less glucose there was.
Lab Group: Brett, Me, Josh, and Sam
We later started a lab in which we'd be testing the amount of pressure the yeast had on the other materials in the test tube. Our first lab we started by adding 3ml of 3%  H2O2 and 3ml of water in to 3 different test tubes. To not mess up our lab results we would conduct each separately. We first added 10 drops of the mixed yeast into test tube one and put the gas pressure sensor inside the tube. 3 minutes of the pressure would be measured each tube and our computer would keep track of the rising pressure of the gas. Once 3 minutes had passed we took of the gas pressure sensor and received 8.007 kPa for 10 drops. After taking of the gas pressure sensor we added 15 yeast mix drops into the 2nd test tube. After putting on the gas pressure sensor on our second test tube we let the 3 minutes pass and let the computer record our data.Our data showed that the 15 drops of yeast had the pressure of 11.4 kPa. Finally we'd be test 20 drops of yeast mix. 20 drops was put into the 3rd test tube and had the gas pressure sensor put into it. 3 minutes of watching the line incline the data showed 8.583 kPa. My bar graph shows that the pressure was highest when there was 15 drops of yeast put into the H2O2 and water. The tube with only 10 drops came out with a pressure of 8.007 kPa, which is the lowest pressure in this experiment.

Enzyme( temperature)

The next day we tested the pressure on 20 drops of yeast in different types of temperature. We first filled 4 test tubes with H2O2 and water then placed each tube into a different temperate area. Placing one in ice, one in hot water, once at room temperature, and in warm water. The most reasonable part would be to start with the room temperature because we don't have to wait for the water to heat up or cool down. So we added 20 drops of yeast and then put the gas pressure sensor on and measured its pressure for 3 minutes. Room temperature shows 8.587 kPa.  After about 5-10 minutes we recieved the cold water and added its 20 drops of yeast and started to measure its gas temperature. 3 minutes later it showed 6.037 kPa. Next was the warm water. Adding yeast then letting the pressure of the gas be collected into the computer, we then came out with 7.427 kPa. Finally, hot water and 20 yeast drops was tested for the pressure it had and was recorded onto the computer. The hot water's pressure came out to 7.427 kPa. According to my results, the room temperature had the highest pressure than the cold, warm, and hot water.

Enzyme( Ph)

This time in the lab we will be testing the pressure of the Ph and yeast together. In each of the test tubes we added H2O2 and then the Ph. First we did the neutral ph and the pressure wiht the gas pressure sensor. After the 3 minutes had passed we collected our data. The neutral turned out with a pressure of 6.4 kPa. Repeating this same step for the acidic and basic Ph, the acidic ph pressure came out as 5.316 kpa and the basic ph pressure was 6.805.Analyzing the data collect, it showed that the basic ph had the highest pressure of the experiment with a range of 1.489 between the highes basic ph(6.805 kpa) and the lowest acidic(5.316 kPa).

PKU

Questions

1. What enzyme is most commonly defective in people with phenylketonuria?
Answer:

PKU occurs from an inherited genetic mutation that causes disruption of the PAH enzyme.


2. What reaction does this enzyme catalyze? (What is the substrate and what product is produced?)
Answer:





3. Describe the symptoms of phenylketonuria.
Answer:

Excess "phe" prevents growth in the brain and developing normally. Also skin rashes, musty body odor, metal retardation, and epilepsey.

4. What causes the symptoms of PKU, the lack of a substance or the buildup of one?
Answer:
PKU affects the ability to use protein properly. Enzymes break down proteins into amino acids tas building blocks for body growth and repair. Only in PKU the enzymes dont function properly. The one that is needed to convert "phe" into another amino acid. As a result to this, "phe" assembles in the blood and the body.



5. How common is phenylketonuria? How is it treated?
Answer:
PKU occurs in 1 in 10,000 to 1 in 15,000 newborns. Although this is so, the incidence varies according to ethnic groups and geographic location.





http://www.ygyh.org/pku/whatisit.htm

Cystic Fibrosis

The site where I recieved my information is of following

http://www.cff.org/AboutCF/

1. What are the signs and symptoms of cystic fibrosis?

The symptoms of Cystic fibrosis are salty-tasting skin, persistent coughing, frequent lung infections, shortness of breath or wheezing, poor growth, weight gain, and/or bulky stools.

2. How common is this disorder?
In about 1,000 cases of Cystic fibrosis are diagnosed every year. More than 45% of the Cystic fibrosis patient population is age 18 and up. Over 70% of patients diagnosed are by the age of two. The median age of a survival for a person that has CF is in the late 30’s.

3. How is cystic fibrosis diagnosed?
Cystic fibrosis is diagnosed by the clogging of the lungs that leads to life-threatening lung infections. Also obstruction to the pancreas that stops natural enzymes from breaking down or absorbing food in the body.

4. How is cystic fibrosis inherited? Does everyone who has a mutant gene for the protein have cystic fibrosis?
Cystic fibrosis is an inherited chronic disease affecting the lungs and digestive system of 30,000 children and adults in the U.S. (70,000 worldwide) 10 million Americans are carriers of the defective gene that show no symptoms the having CF. The product of the defective gene and the product cause the body to produce think sticky mucus.

http://resources.schoolscience.co.uk/MRC/3/page3.html

1. Explain the normal function of the protein that is defective in cystic fibrosis.
The CF transmembrane regulator ( CFTR) protein makes the chloride channel. This proteins normal function controls the flow of chloride ions from the cell.
2. What happens to this protein in CF patients and what are the consequences for the health of these individuals?                    
A person with CF has the cital chloride channel blocked. There is no movement of chloride ions into the mucus and the mucus starts to dry out.  

For the questions below this is the link to where I received all of my information.

http://www.mayoclinic.com/health/cystic-fibrosis/DS00287

1. Explain at least 3 treatments for the symptoms of cystic fibrosis.
Three treatments for CF are Antibiotics, Mucus-thinning drugs, and therapy.
The Antibiotics are the drugs that help prevent lungs infections. These can be swalloed in pill form, inhaled in mist or delivered intravenously. Mucus-thinning drugs reduce the stickiness of the mucus to it makes coughing it up easier, helping the lung function properly.Therapy helps physically remove the think mucus from the lungs. By clapping on the back and front chest with cupped hands also helps get it out.

2. Discuss at least 3 ways for parents to help their children who have cystic fibrosis.
Parents that have children with cystic fibrosis should have their child exercise, drink lots of fluids, and keep immunizations up to date.
Exercise helps loosen mucus that is in the airways and heps strengthen the heart and lungs. Anything that gets the child moving would help loosen up that mucus.
Keeping immunizations up to date such as the influenza vaccines helps because although CF doesn’t affect the immune system the child still is more likely to develope complications when becoming sick.

Osmosis experiment(:

At first me, Josh, and Sam had to come up with a lab experiment that shows osmosis. The supplies given to us where cups, baggies, and a scale that measured weight in grams. We all came to a conclusion of how we were gonna conduct this experiment. First we gathered all of our experiment materials and placed them in our lab area. The experiment had to be controlled, so we filled our 3 cups with 5 oz. of water and selected our three baggies to put our substances into. Opening the top of the baggy I tied the bottom of the bag with about 5 inches of string so that our inside substances wouldn't come out the bottom. After all 3 baggies were tied we filled each with water, but not too much water to where we couldn't add anything into it. Now it was time to add our substances into the bags of water. 3 different types of products we were gonna test. Equate Antacids, Cheerios, and Light Corn Syrup we chosen to use. Crushing the 3 antacids, I had to make sure that the pieces were small enough to fit and cause osmosis. When it was finally crushed, Sam held open the bag and I poured the entire substance into the  baggy. Finally, I tied the top of the bag and we set it aside. We followed the same steps with the cheerios. From crushing up 4 cheerios, to adding it into the water and tying the top. This time if the corn syrup we just had to pour some corn syrup into the baggie. After tying that last baggy, we grabbed all baggies with the substances in it, and weighed each separately. The baggy with the antacid results showed 12.88 grams. The baggy with the cheerios weighed 10.78. Next we weighed the baggy with the corn syrup showing 5.86. After all three were weighed we dropped them into the 3 seperate cups we started with. Our times to  analyze our data was in 1 hour and a day later. An hour later I came in and took out the 3 baggies and dried them all. Once they were dried I took each and placed it on the scale one at a time and recorded its grams. Antacids pulled in 1.11 oz and now weighing 13. 99 oz. Cheerios pulled in .97 oz now weighing 11. 71 oz. Corn syrup gained .73 oz now weighing. The following day we then measured their weight once more. Antacids started with 12. 88 then an hour later weighed 13.99 and a day later weighed 13.55. Cheerios started with 10.78 then 11.71 and ended with 11.59. Corn syrup started with 5.86 then an hour later weighed 6.59 and ended with 5.95. My results showed that with their starting weighted osmosis allowed water in the hour before I collected my results. A day later osmosis occurred when letting water out because each weighed less than the hour later analysis.  

Osmosis 

By definition, osmosis is the tendency of a fluid, usually water to pass through asemipremeable membrane into a solution where the solvent concentration in higher, thus equalizing the concentrations of materials on either side of the membrane. In our lab osmosis occurred because water passed through the baggy from the outside inside of the baggy. Where the concentration is higher the water goes into.  Connceting this to my lab, the water passed into the baggy because the concentration was higher and making it weigh more than it did before.