Exam 2: Osmoregulation and Excretion Flashcards
What are the three compartments in the body that water is stored in?
Circulatory fluid, interstitial fluid, and intracellular fluid
What separates the compartments that store fluid in the body?
A single celled tissue layers
What are the three modes blood plasma composition?
Osmotic, ionic, and volume regulation
What are the too forms of osmotic regulation?
Regulators and conformers
Do volume conformers exist?
No
Why does a high osmotic pressure mean?
Solute concentration is high, water wants to leave the location it is in
What does hyperosmotic mean?
A high solute concentration
What does hypoosmotic mean?
a low solute concentration?
When do organisms have a higher osmotic pressure in urine than blood plasma?
Never, only do so with specific ions to regulate ion concentrations in the body
Why would an organism what a higher solute concentration in its urine of specific solutes?
Marine organisms do this to pull out ions that would react with the salt ions coming into their tissues
When urine and plasma have equal osmotic pressures, how is plasma volume and solute concentration affected?
The plasma volume is reduced and concentrations are unaffected
When urine has a lower osmotic pressure than blood plasma, how is plasma volume and solute concentration affected?
volume decreases and solute concentration increases
How does resource consumption affect osmoregulation?
Urine must increase in solute concentration when foods high in ions are consumed
In order from least to most, which molecules produced metabolic water?
proteins, carbohydrates, and lipids
What are three mechanisms of organismal water loss?
Respiratory (evaporation), urinary, and fecal
