There are two routes for eliminating solutes from the circulation. The first is _______, which transfers...

There are two routes for eliminating solutes from the circulation. The first is _______, which transfers solutes directly from the blood to the tubular lumen, and the other is _______, which transfers solutes from peritubular capillaries to interstitial fluid, and from there through tubular cells into the tubular lumen.

Multiple Choice

passive transport; active transport
filtration; tubular secretion
filtration; passive transport
tubular secretion; filtration

Expert Solution

Answer

There are two routes for eliminating solutes from the circulation. The first is filtration, which transfers solutes directly from the blood to the tubular lumen, and the other is tubular secretion, which transfers solutes from peritubular capillaries to interstitial fluid, and from there through tubular cells into the tubular lumen.

- Glomerular filtration is the first route for solutes to enter tubular lumen. Capillary hyrdrostatic pressure facilitates filtration of solutes into Bowman's capsule.
- The soutes filtered include : Glucose, amino acids, drugs, hormones, NaCl, water

- Tubular secretion is another route for solutes to enter tubular lumen. Solutes such as H+ ions, ammonia, creatinine, urea are secreted into the tubule lumen by peritubular capillaries.
The pathway is : Pertubular capillary Interstitial fluid Cells of tubular wall Tubular lumen.

Option B) Filtration; Tubular secretion

Sydney Mullin answered 1 year ago

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