February 1, 2006 at 10:42 am #3439
If a drowining person inhales fresh water into their lungs, death occurs rapidly in about three minutes. If a drowning person inhales sea water instead of fresh water, death occurs more slowly taking about six to eight minutes. Use your understanding of osmiosis to explain the differnce between inhaling fresh water and sea water. You will need to consider the relative salt concentrations of sea water (1100 mOsm), blood (300 mOsm) and fresh water (0 mOsm)
I would like some help with this 🙂
February 7, 2006 at 10:03 am #39983
Does anyone know? =(
February 7, 2006 at 7:42 pm #40052MrMisteryParticipant
Yes… Do you understand how osmosis works?
February 8, 2006 at 9:58 am #40150
Yes, but not in this question 😥 … otherwise I wouldnt have asked ^^
February 9, 2006 at 4:44 am #40242
Hey, Andrew (a.k.a. MrMystery) is correct, he directs you to explain it by yourself. If you understand the concept of osmosis, you will be able to answer the question.
Ok, I give you more clue:
Compare the concentration between saline:blood and freshwater:blood. This is an idea to answer why the drowning is slowly in saline rather than in freshwater.
Try to write your answer here and let us to correct when you make a mistake. Good luck 🙂
February 9, 2006 at 9:30 am #40278
Ok, this is my go at the answer, not sure if its correct though.
In fresh water, there are more free water molecules, making the concentration gradient higher, so water diffuses in when you inhale it, more rapidly… but in salt water, there are not so many free water molecules, therefore there is less of a concentration gradient… so water doesnt get in as quickly… ?
But the salt concentration in sea water, would that be more or less than in us? I’m not even sure we even have salt in us… can water diffuse out our lungs into sea water, or is that not possible?
February 10, 2006 at 7:06 am #40369
We HAVE salt in our body fluids, in concentration 0,09 % 😉
You can make a fluid isotonis with our body liquid by mix NaCl (pure) with distilled water and heat as 37 oC, it is called as "Physiological Saline" 🙂
February 10, 2006 at 8:47 am #40385sdekivitParticipantquote Dr.Stein:
body fluid salt concentration is 0,9 % NaCl 😉 not 0,09% (physiological salt solution)
February 10, 2006 at 10:38 am #40402quote sdekivit:
Oops sorry I am sure this it the time for me to change my keyboard. Last time it types more "a" and then too many "enter" and now too many "0" 😈 😳 That’s what I mean. Thanks for correction 😉
*throws the keyboard away* 😆
February 10, 2006 at 10:47 am #40406
I think I’ve given the answer for this question….back then, someone PM me and ask this question..I think the name is "thetuuch"…:?
February 11, 2006 at 11:45 am #40495
So, the salt concentration in us makes a difference?quote :
Really? Do you remember what you wrote?
February 11, 2006 at 12:24 pm #40501
Taken from my sentbox:quote :
Now I’ll add a little…drowning in sea water force you to drink much of sea water. Means that too many water will affect your electrolyte equilibrium and to much of Na+ ion inside the blood vessels will force the water from tissue to the vessels (because of diffusion). So, crenation of tissues occur isn’t it?
February 12, 2006 at 9:40 am #40582
I’m afraid I only understand you a little, sorry… Electrolyte equilibrium? Crenation? … =S
I dont suppose you know, but I’ve only just started my second year of Biology =( I dont know, well, too much 😯
February 12, 2006 at 11:23 am #40595
Ach so….:lol: try to search the difficul words in dictionary….and electrolyte equilibrium is the balance stage of electrolyte between tissues and interestisiil environment..:wink:
February 22, 2006 at 10:54 am #41536
erm… repeat that again?
February 26, 2006 at 1:37 pm #41837
Um, you know chemistry don’t you? what I mean by equilibrium here is like a reversible reaction in chemistry…
just imagine that in the left side is cell and in the right side is insterestisiil humour…
March 21, 2006 at 10:11 am #43875
I think I understand you know, thanx =)
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