Login

Join for Free!
118328 members


HYPOTONIC SOLUTION

Discussion of all aspects of cellular structure, physiology and communication.

Moderator: BioTeam

HYPOTONIC SOLUTION

Postby thriller13 » Thu Oct 27, 2005 1:20 am

When we go for a swim, the water in the pool is hypotonic to the cells in our body. How come our cells do not absorb the water and burst? any help would be greatly appreciated. thanks
thriller13
Garter
Garter
 
Posts: 2
Joined: Thu Oct 27, 2005 1:17 am

Postby Fried Zygote Sandwich » Thu Oct 27, 2005 3:19 am

Well, the outer layer of skin cells is usually dead anyway I believe. There is also a substance that is secreted, keratin I think?, that makes our skin waterproof. Overproduction of this makes the skin not stick to itself and causes dandruff.
Fried Zygote Sandwich
Death Adder
Death Adder
 
Posts: 58
Joined: Wed Sep 28, 2005 4:50 am

Postby Poison » Thu Oct 27, 2005 5:53 am

There is a wax like substance above the outer layer. You can test it by dropping some water on your skin. It stays as a sphere like structure. Plus outer layer does not allow water to pass easily.
It matters not how strait the gate
How charged with punishment the scroll
I am the Master of my fate
I am the Captain of my soul.
User avatar
Poison
Inland Taipan
Inland Taipan
 
Posts: 2322
Joined: Sun Jan 02, 2005 12:44 pm
Location: Turkey


Postby Navin » Thu Oct 27, 2005 6:58 am

Sometimes the water enters and the cells expand causing those wrinkles.
However they do not burst as they are closely packed.
Botany is the study of what? Bottoms!
User avatar
Navin
Coral
Coral
 
Posts: 277
Joined: Thu Jun 09, 2005 2:23 pm
Location: Singapore (Asia Pacific)

Postby chicoguardian » Thu Oct 27, 2005 12:14 pm

water being hypotonic does not play a big role with cells, water flows in and out a cell in certain was depending on the concentration, it will get rid of the water not burst
Life is not of comedy but tragedy, life lives and then dies in sorrow
User avatar
chicoguardian
Coral
Coral
 
Posts: 121
Joined: Wed Oct 19, 2005 12:18 pm

Postby Terry K. » Thu Oct 27, 2005 2:34 pm

Yeah, that it why you get pruned, it's actually your cells secreting the jellious material, I also think it's keratin, that is used to withhold some of the water, the keratin acts as a sort of exterior membrane to the skin because of the secretion. Also, the secretion is made of lipids, and lipids are insoluble, so there you go.
Saying that any two humans are exactly alike is like saying republicans have morals
Terry K.
Death Adder
Death Adder
 
Posts: 96
Joined: Mon Oct 24, 2005 1:42 pm
Location: Myerstown, PA

Postby mith » Thu Oct 27, 2005 10:58 pm

In plant cells there's the cell wall there to prevent the cells from expanding too much, in our skin cells, they're probably limited in size by fibers such as collagen and elastin.
Living one day at a time;
Enjoying one moment at a time;
Accepting hardships as the pathway to peace;
~Niebuhr
User avatar
mith
Inland Taipan
Inland Taipan
 
Posts: 5345
Joined: Thu Jan 20, 2005 8:14 pm
Location: Nashville, TN

Postby MrMistery » Fri Oct 28, 2005 7:37 pm

Epitelial tissue has very few fibers, practically non-existent...
"As a biologist, I firmly believe that when you're dead, you're dead. Except for what you live behind in history. That's the only afterlife" - J. Craig Venter
User avatar
MrMistery
Inland Taipan
Inland Taipan
 
Posts: 6832
Joined: Thu Mar 03, 2005 10:18 pm
Location: Romania(small and unimportant country)

Postby mith » Fri Oct 28, 2005 9:32 pm

hmm, our bio teacher showed up skin tissue the other day and said it was dense connective tissue made with collagen. Im inclined to think he's wrong...again :\
Living one day at a time;
Enjoying one moment at a time;
Accepting hardships as the pathway to peace;
~Niebuhr
User avatar
mith
Inland Taipan
Inland Taipan
 
Posts: 5345
Joined: Thu Jan 20, 2005 8:14 pm
Location: Nashville, TN

Postby Fried Zygote Sandwich » Sat Oct 29, 2005 12:18 am

Plant cells prefer a hypotonic solution so they stay turgid. Animal cells burst because they don't have a cell wall.


But here's a quote from wikipedia that backs up what I said previously about keratin.

Keratin is a tough, insoluble protein found in the outer layer of the skin of human beings and many other animals. This outer layer of skin is called the epidermis. The outermost layer of cells of the epidermis contains keratin. The keratin in these cells makes the skin tough and almost completely waterproof. In places where the skin is exposed to much rubbing and pressure – such as parts of the hands and feet – the number of cells containing keratin increases and a callus develops. Cells that contain keratin are constantly being shed and replaced by new ones. The condition known as dandruff results when the scalp sheds such cells.
Fried Zygote Sandwich
Death Adder
Death Adder
 
Posts: 58
Joined: Wed Sep 28, 2005 4:50 am

Postby thriller13 » Sat Oct 29, 2005 7:04 am

thanks soo much everyone
thriller13
Garter
Garter
 
Posts: 2
Joined: Thu Oct 27, 2005 1:17 am

Postby MrMistery » Sun Oct 30, 2005 11:36 am

mithrilhack wrote:hmm, our bio teacher showed up skin tissue the other day and said it was dense connective tissue made with collagen. Im inclined to think he's wrong...again :\


Oh boy, structure of the skin. Ok, here it goes:
Skin is composed of 3 layers: epidermus, dermus and hypodermus.
The epidermus is a pluristratified squamos keratinised epithelial tissue formed from 20-25 cell layers. These are divided into 5 regions(also layers): base layer, spine layer, granular layer, lucid layer and the 5th one whch i can not translate. The first 2 make up the germinating blanket and the last 3 make up the rigid blanket. It is estimated that it takes aproximately 3 weeks for a cell to reach the top layer from the base one.
The dermus is made out of dense connective tissue. This is made out of the papillary dermus and the reticulary dermus. In the papillary layer you can find the dermic papiles(duh!) which are more obvious on your hinger and which give you fingerprints. In the reticular dermus you can find many colagen fibers, along with a lot of intercelular substance and few cells.
The hypodermus is made out of connective tissue(we call it "lax" in romanian but i don't know how it's called in english)with a variable number of fat cells that form adipose padicules(around 200-400) around blood vessels and nerve endings. Here you can also find the hair folicules according to some biologists(others place it in the dermus) and the glomerule of the sweat glands.

So you see, Dave, your teacher knows some biology, but something tells me i would do a better job than him :D 8)
"As a biologist, I firmly believe that when you're dead, you're dead. Except for what you live behind in history. That's the only afterlife" - J. Craig Venter
User avatar
MrMistery
Inland Taipan
Inland Taipan
 
Posts: 6832
Joined: Thu Mar 03, 2005 10:18 pm
Location: Romania(small and unimportant country)


Return to Cell Biology

Who is online

Users browsing this forum: No registered users and 1 guest