Flashcards
Renal Function (part 1)
Cards in this deck (13)
- 1What is the Nephron?The functional unit of the kidney
- 2Where is the nephron located?Within the renal cortex of the kidney, spilling into the renal medulla.
- 3What are the tubular components of the nephron?> Bowman's capsule
> Proximal tubule
> Descending loop of henle
> Loop of Henle
> Ascending loop of henle
> Distal tubule
> Collecting Duct - 4What are the vascular components of the nephron?> Renal Artery
> Renal Vein
> Glumerulus
> Peritubular capillaries - 5What are the 3 processes of filtration?1. Filtration
2. Reabsorption
3. Secretion - 6Explain the pathway of filtrationBlood enters the glumerulus in the bowman's capsule where it moves to the proximal tubule and down into the loop of henle
- 7Why is osmotic pressure important in filtration?There is an hydrostic pressure within the atriole of 55mmHg. While there are 2 opposing pressures (osmotic & hydrostic) which equal 45mmHg. When high blood pressure is present, opposing force is too great and blood cannot be filtered out.
- 8Where must filtrate pass through?> pores of the glomerular capillaries
> the basement membrane
> slits within the bowman's capsule - 9What is reabsorption?The selective movement of solutes out of the filtrate and back into the blood via the peritubular capillaries
- 10What electrolyte is needed for reabsorption occur and how does reabsorption occur?Through both passive and active transport mechanisms, K+ is pumped into the tubular cells to pull Na+ and H20 out of the tube and back into the peritubular capillaries.
- 11What part of the nephron is impermeable to water?The ascending loop of henle
- 12What is secretion?Selective movement of non-filtered substances from peritubular capillaries into the tubular system
- 13How does secretion work?The same as reabsorption but in reverse. K+ will diffuse back into the tubule system, to be filtered out.
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- Flashcards for the filtration process in the kidneys
- Created by
- Riki M
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