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Hyperosmotic

Definition

adjective

1. Of, relating to, or characterized by an increased osmotic pressure (typically higher than the physiological level).

2. A condition in which the total amount of solutes (both permeable and impermeable) in a solution is greater than that of another solution.


Supplement

For instance: In kidneys, the tubular fluid is:
- iso-osmotic (to plasma) when it is at the beginning of the loop of henle
- hyperosmotic (to plasma) when it is at the tip of the loop
- hypo-osmotic (to plasma) when it leaves the loop


Word origin: G. hypo: under, below + osmotic: relating to osmosis.
Related forms: hyperosmotically (adverb), hyperosmosis (noun).
Related phrases: hyperosmotic solution.

Compare: hypoosmotic, isoosmotic.
See also: tonicity, osmosis, osmotic pressure, diffusion, plasma membrane.


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Re: Urine formation

... the collecting duct probably by expanding the size of pores of the walls of the duct. Then, as the fluid in the collecting duct passes through the hyperosmotic region of the kidney medulla, water diffuses through the pores into the surounding interstitial fluid and is carried away by the blood ...

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by chikis
Mon Nov 14, 2011 12:35 pm
 
Forum: Physiology
Topic: Urine formation
Replies: 7
Views: 6530

Cell Membrane

... the membrane (the cell does not contain this ion). After a period of time, the solution into which the cell was placed would become: (1 mark) a) hyperosmotic b) hypotonic c) isotonic d) hypertonic e) iso-osmotic Is it iso-osmotic? Which of the following molecules is least likely to cross the ...

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by Nicolodn
Sat Sep 18, 2010 8:05 am
 
Forum: Cell Biology
Topic: Cell Membrane
Replies: 1
Views: 5479

Advice re Osmolality Question.

... ways to go I think before I totally get my head around this. So to change the way I was thinking more to: The mixed solution is 600 mOsm and is hyperosmotic to the cell at 300 mOsm (this means the cell would release water to its surroundings if osmolarity was the only consideration). This is ...

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by Doubled
Fri Apr 06, 2007 2:23 am
 
Forum: General Discussion
Topic: Advice re Osmolality Question.
Replies: 5
Views: 9932

Cell Permability

... of cell membrane) it describes this process of water going into the cell...? i agree that its hypotonic but wtf is hypertonics definiton ( i.e hyperosmotic solution; higher solute concentration { lower water concentration) than other side of cell membrane pretain to/? Ooooh ok....no the book ...

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by Mooks
Mon Mar 20, 2006 10:48 pm
 
Forum: Cell Biology
Topic: Cell Permability
Replies: 6
Views: 20673

Cell Permability

... of cell membrane) it describes this process of water going into the cell...? i agree that its hypotonic but wtf is hypertonics definiton ( i.e hyperosmotic solution; higher solute concentration { lower water concentration) than other side of cell membrane pretain to/? 3 i still cant figure ...

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by Host
Mon Mar 20, 2006 10:20 pm
 
Forum: Cell Biology
Topic: Cell Permability
Replies: 6
Views: 20673


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