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Stack #39726
A&P2 Test 5 #10 Urinary-Tubular secretion
| Question | Answer |
|---|---|
| TUBULAR SECRETION involves: | adding materials that were removed from blood to the filtrate |
| Tubular secretion-2 main effects: | 1) rids body of certain materials & 2) controls Ph of blood |
| Normal Blood Ph is | 7.35 to 7.45 |
| Diet varies so, constant: | adjustments must be made |
| Renal tubules (mostly DCT) secrete: | acid producing materials in the form of hydrogen & ammonium ions |
| Hydrogen ions stimulate prod.: | of carbonic acid, using carbon dioxide diffused from peritubular caps |
| Hydrogen ion-bond w/sodium &: | form a weak acid that is eliminated in the urine |
| If blood is too acidic it can be: | elevated by secretion of ammonium ions |
| Ammonia is a: | poisonous waste product |
| Ammonia is from: | DEAMINATION of amino acids |
| Ammonia is converted: | to urea by liver |
| Urea & ammonia are part of the: | glomerular filtrate and are subsequently expelled from the body |
| When ammonia forms in DC: | & collecting tubules it combines w/hydrogen to form the ammonium ion |
| Cells secrete ammonia in filtrate: | and it replaces a positive ion; usually sodium,in a salt & it is eliminated |
| Product of nephrons function is | urine |
| Volumn of urine per day | 1.5 liter |
| Urine is 95% | water |
| The yellow look of Urine is from: | presence of UROCHROME |
| Color can be affected by: | diet, ie red color from beets, or by water volumn |
| Odor of unine may | vary; ie:asparagus adds methyl mercaptan that give a unique odor. |
| Diabetics have | fruity smelling urine |
| Stale urine has the smell of ammonia due to: | ammonium carbonate formation, which is from the bacterial metabolism of urea solutes |
| Normal Urine is slightly | acidic (pH 5.0-7.8) |
| Urine rarely becomes more acidic: | than 4.5 or more alkaline than 8.0 |
| Variations in pH are related to: | diet |
| High protein diets increase: | acidity |
| Vegestable diets increase | alkalinity |
| SPECIFIC GRAVITY is ratio of: | weight of a volumn of a substance, to the weight of an equal volumn of distilled water |
| Specific Gravity of urine ranges: | from 1.008 to 1.030 dep. on the amt of dissolved solute in the urine |
| Urine-only a trace of: | glucose, ketones, proteins, RBC's, WBC's, etc... |
| CASTS are tiny masses of | material that have hardened & assumed the shape of tubular lumens |
| Casts are flushed from tubules: | by filtrate build up in back of them |
| UROCHROME | a pigment by product of the metabolism of bile |
Created by:
Jean and Study Pals