6470458
Description
Flashcards by Reuben Veysey-Smith, updated more than 1 year ago
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Created by Reuben Veysey-Smith
over 7 years ago
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| Question | Answer |
| Basic kidney structure | Outside is the renal capsule Inside membrane is cortex Inside part os medulla |
| Kidney blood supply | Enters through renal artery and then passes through capillaries in the cortex In these capillaries, substances are filtered out of the blood and into long tubules (ultra filtration) Useful substances are reabsorbed back in the medulla and cortex (selective re absorption) The filtered blood passes out in the renal vein |
| Kidney and waste products | Unwanted substances such as urea pass along the tubules, then along the ureter to bladder where they're expelled as urine |
| Blood into nephrons and Bowman's capsule | Blood from renal arteries enters smaller arterioles in the cortex Each ateriole splits into a glomerulus - a bundle of capillaries looped inside a hollow ball called the Bowman's capsule where ultra filtration takes place |
| After Bowman's capsule | Arteriole which takes blood away is efferent and is much smaller smaller, this means a high pressure which forces liquid and small molecules out into the Bowman's capsule |
| Filtration inside Bowman's capsule | Filtrate passes through 3 layers, the pore in endothelium (large molecules cant pass through) then a basement membrane followed by splits in endothelium, proteins for example are to big to pass through, useful filtrates are later re-aborbed waste ones pass out to ureta |
| PCT | Before the loop of henle, and is part of selective re absorbtion. The walls have microvilli meaning a large surface area. Useful substances such as glucose and vitamins are re-absorbed by active transport and facilitated diffusion |
| What urine is made up of | Made up of water urea and excess vitamins Does not contain proteins, blood cells or glucose which is reabsorbed |
| What tissue lines the walls of the PCT | Epithelium |
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