Cell

Question: cell...........? When did you or when can u get a cell? i cant get 1 till 9th grade!! uggggg same w/ laptop

Answer: 9th grade I got my cellphone. 12th grade I got my laptop for X-mas :)

Question: What cell has the longest lifespan in the body? I've been trying to find out which type of cell lasts longest in the body (besides the permanent; neurons, heart cells, spinal tissue, others). Really, what I want to know is how long it takes before my body has totally shed itself away and (possibly) no cell remains from the old one. And what would be really really helpful is if someone could help find bone cell lifespan. I figure this will be the deciding factor anyway, but I've read 6mon.-7years. One of those must be false.

Answer: Various muscles take about 15 years to be replaced. See the various sources below. Estimates and sources are describing Jonas Frisen's research...which was pretty neat. Because there was a lot of nuclear testing in the 60's, everybody born at that time has a higher dosage of carbon-14, and using that he's carbon dated various human cells.

Question: What cell phone company is the cheapest and has good cell phones? I want a cell phone that I can text and take pictures on. What company in the United States is the cheapest like on the cell phone bill that you pay monthly? Also, I want to know if they have good cell phone plans too. Thank you to all who answer my question. Anybody who is familar with Denver, Colorado. What cell phone company is best here?

Answer: check if you have cricket around they have some good plans for texting also what u can do is check what service your friends have the most, that way you can get free mobile to mobile and you wont have to paythat much for the service.

Question: How to I mirror cell contents from any cell in a database to one particular cell in Excel? Basically I am trying to mirror the information from any clicked cell in the database to a certain cell. My database contains about 1500 numbers and I need to have the information from any clicked cell to be mirrored to only one particular cell. The only formula I use is A1=(B1). But when I need to add more info A1=(B1:C21) I get a #VALUE!. So Please help! Any help will be highly appreciate it!

Answer: Assume the block of 5000 cells is in sheet1, as a sample i reduce it to only 50 cells "A1:E10" the cell that depends on the click is F1 of Sheet1 Alt-F11 to open VBA editor, and double click on left Sheet1(Sheet1) icon then paste the following code to the right blank area Private Sub Worksheet_SelectionChange(ByVal Target As Range) ===============CHANGE VALUE AFTER = SIGN ONLY=== cellblock = "A1:E10" targetsheet = "Sheet1" targetcell = "F1" '==============DON'T CHANGE CODE FROM HERE====== If Target.Cells.Count > 1 Then Exit Sub If Not Intersect(Target, Range( cellblock)) Is Nothing Then    Worksheets( targetsheet).Range( targetcell).Value = Target End If End Sub Here's is a demo http://www.freewebs.com/swhtam/YA/click2Assign.xls Alt+F11 to open vba editor to see the full code. Please post more or email me for more details Hope this helps.

Question: What company cell phone can i connect to a metro plan? I wont to get a cell phone but i don't wont a cell phone from metro. But i wont the $50 plan of metro. What company cell phone can i connect to a metro plan? Like: Verizon, T-mobile, AT&T, Sprint Remember i gust wont a cell phone that can be connected to a metro plan.

Answer: veruzon and sprint only.

Question: How does one egg cell become different kinds of specialized cells? You start out as one cell and it splits, but how do different kinds of cells like bone cells and nerve cells develop?

Answer: the process is called cellular differentiation read about it here http://en.wikipedia.org/wiki/Cellular_differentiation

Question: Why does a small cell possess a large surface area compared to a bigger cell? "Size of a particular cell is dependent on the surface area/volume relationship. A small body possesses a relatively large surface area, and vice versa. Since many nutrients enter the cell and wastes leave the cell by diffusion, and the rate of diffusion is directly proportional to the area available, a small cell is more efficient than a larger one" Can someone Please explain in simple words? :) thankyou!

Answer: A cube 1mm on an edge has 6 sides, each 1mm↑2, so the surface area is 6x1mm↑2 =6mm↑2. Its volume is 1x1x1 = 1mm↑3. The s/v ratio is 6/1 = 6. A cube 3mm on an edge has 6 sides, each 9mm↑2, so the surface area is 6x9mm↑2 = 54mm↑2. Its volume is 3x3x3 = 27mm↑3. The s/v ratio is 54/27 = 2. You must know what a cube is and how to calculate area and volume....

Question: What cell phone company has 200 minutes and unlimited texting for a good deal? I'm looking cell phone company that has atleast 400 minutes or less and unlimited texting for a good price. Nothing over 50$ I'm trying to prove to my parents that not all cell phone company's are over-priced. Then maybe, I might get a cell over the future.

Answer: Check the Unity and Nation plans on AT&T. I have 550 mins for 59.99 with added 10.00 texting. Works well if you can add about 12.00 to your budget!

Question: What specific cell does osmosis transfer water to? This is for homework. I cannot seem to find what SPECIFIC cell osmosis transfers water to. Search after search I just find that "Osmosis is a special term used for the diffusion of water through cell membranes", but I am curious to which cell do these membranes belong?

Answer: Osmosis is the diffusion of water across a membrane into the cytoplasm. thats all it is. All cells bring in water though osmosis

Question: How can touching a single cell lead to a relatively large number of cells exhibiting a response to that touch? Plant cells are capable of responding to touch. One of the steps in the response pathway to touch is an increase in Ca2+ ions in the cytosol of the touched cell. How can touching a single cell lead to a relatively large number of cells exhibiting a response to that touch?

Answer: The sensation spreads throughout the cells closest to the 'touched cell', allowing chemicals and electrical signals to be carried to the nervous system and finally the brain...

Question: How harmful are cell phones to the brain and the human body? You read about all the magnetic waves that cell phones radiate, and how it is bad for your body (especially your brain.) But what are the worst case scenarios for using a cell phone for a long period of time? Do you get cancer? Less intelligent? Also, is it true that the lower the battery of the cell phone, the more radiation it emits? One final question, is it harmful to keep your cell phone next to your testicles/penis (scientific terms I'm using)? Thanks.

Answer: After years of observation and argument, nobody has come up with proof that cell phones are dangerous to health, but it is reasonable to limit the exposure in children, whose brains are still developing. They really don't need to be on the phone all the time anyway. A low battery does not increase the radiation. However, the further you are from the base station, the greater the radiation. this is because the phone senses that reception is weak, and increases its own output to ensure good contact

Question: What is one of the differences between cell division in plant cells and cell division in animal cells? What is one of the differences between cell division in plant cells and cell division in animal cells? A) Plant cells do not use a mitotic spindle to separate chromosomes. B) Plant cells separate chromosomes by attachment to the plasma membrane. C) In a plant cell, there is no nucleus around the chromosomes. D) There is no DNA replication before cell division in plant cells. E) Plant cells separate by growth of a cell wall and membrane in the middle of the cell.

Answer: E is the correct answers. After the last phase of mitosis, animal cells undergo cytokinesis - a pinching of the cytoplasm and cell membrane into two separate entities. However, plant cells simply grow a new wall in the middle of the cell once chromosomes and organelles have separated from the metaphase plate.

Question: How do cells “know” of they should let a large molecule into the cell? By the cell membrane? Which regulates what can enter and leave the cell?

Answer: The cell membrane has many transmembrane proteins that act as pumps or channels for different substances to enter or exit the cell. Which proteins each cell has depends on its function. For example, the proximal convoluted tubule of the nephron (the functional part of the kidney) has the Na+/Glucose co-transporter, which allows any sugar filtered from the blood by the kidney to be returned to the body.

Question: What is the cell potential given these molarities? A student prepares a Fe|Fe2+||Ni2+|Ni cell using a 0.25 M solution of nickel nitrate and a 0.75 M solution of iron(II)chloride. What is the cell potential? Second part of question: The supply of potassium nitrate solution has run out, and the student preparing the cell decides to improvise by using the zine nitrate solution. What effect will this have on the cell potential?

Answer: see the Pearson's chi square test

Question: What is unique to only the sperm cell? What cells does the sperm cell interact with in the human body? What distinguishes the sperm cell from other cells? I know that it has an acrosome but I can't come up with anything else. And also, what other cells in the human does it directly and indirectly interact with? Obviously it interacts with the egg cell but what else and how?

Answer: it has half the amount of chromosomes, and it interacts with the egg cell

Question: What is the advantage of attaching cells in a series versus using a single cell? What is the advantage of att? What is the advantage of attaching cells in a series versus using a single cell? What is the advantage of attaching cells in parallel versus using a single cell?

Answer: for bigger Voltage, cell in series. for bigger Current cells in parallel.