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3 cards from this section. Quick, good the night before a test.
What is the counter-current mechanism?
Think about the flow directions of both structures.
What is the primary component that contributes to the osmolarity gradient?
Remember the solutes involved in urine concentration.
What is primarily responsible for maintaining the osmolarity gradient in the kidney?
Think about the substances that contribute to osmotic pressure.
True or False: The descending limb of Henle's loop is impermeable to water.
Consider the properties of the descending limb.
Discuss the implications for an animal living in a dry environment that cannot utilize the counter-current mechanism effectively. What adaptations might it develop?
Consider the trade-offs between survival strategies.
If the osmolarity of the filtrate in the loop of Henle remains constant rather than increasing as it descends, how does that affect urine concentration?
Think about the relationship between osmolarity and water reabsorption.
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