What to know Basic definitions of filtration, secretion and reabsorption Know th
ID: 3482585 • Letter: W
Question
What to know Basic definitions of filtration, secretion and reabsorption Know the factors that can affect GFR Know routes of tubular reabsorption Know the meaning and implications of a substance having a transport maximum. Relative numbers of substances that are reabsorbed (don't memorize the chart, but have a basic idea) Examples of substances that are secreted Substances that urine should not contain Locations and amounts in the tubule where water and sodium are reabsorbed Mechanism of Na-reabsorption in the proximal tubuleExplanation / Answer
1.Filetration:Filtration of protien free fluid from the blood in glomerular capillaries into the lumen of Bowmans capsule is called as ultrafiltration.
Reabsorption: Absorption of useful substances from the ultrafiltrate as it passes through the cavity of Nephron into the blood of peritubular capillaries is called as reabsorption or tubular reabsorption.
Secretion: removal of waste substances from the blood of peritubular capillaries into the ultrafiltrate is called as tubular secretion.
2. Factors that affect GFR are;
Arterial pressure.
Glomerular capillary pressure.
Colloidal osmotic pressure.
Hydrostatic pressure of Bowmans capsule.
3. Tubular reabsorption takes place from the renal tubule 8nt of blood flowing in peritubular capillaries.