VASCULAR
THE NEPHRON
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Which statement best explains the flow of materials out of the nephron?
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The active transport of Na+ (and thus Cl-) creates salt, which pulls water using a concentration gradient in an attempt to create equilibrium
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The high pressure from the renal artery creates a force that pushes water through permeable areas, which creates an equilibrium in pressure
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There is no explanation. The kidneys work randomly and it is amazing that they function correctly.
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Water is actively transported out of the nephron and the nephron compensates by actively pushing out ions in an attempt to balance the charges
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Explanation:
Detailed explanation-1: -Active transport uses energy to transport molecules across the plasma membrane. This uses energy from ATP. They also use pumps to get molecules in or out of the cell. Passive Transport does NOT use energy to transport molecules across the membrane.
Detailed explanation-2: -Osmosis. Osmosis is a special type of diffusion, namely the diffusion of water across a semipermeable membrane. Water readily crosses a membrane down its potential gradient from high to low potential (Fig. 19.3 ) [4].
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