Water Urea (nitrogenous-based wastes) Toxins Salts -No bacteria, protein, sugar
Proteins Lipids Nucleic Acids Carbohydrates
The Excretory System: Functions
1. Dispose of metabolic wastes 2. Maintain osmolarity (water/ion balance) of blood
Kidney- bulk of work; distinct region/system of tubules where blood is cleaned and filtered Ureter- tube that delivers urine to the bladder Urinary Bladder- stores urine Urethra- expels urine
-Functional unit of the kidney
Big step, small molecules from blood into kidney -GLOMERULUS- high pressure in the glomerulus forces blood into bowman's capsule -BOWMANS CAPSULE: contains glucose, amino acids, salts, UREA -not protein molecules, cells, RBC, bacteria
-kidney gives important molecules back to the blood -PROXIMAL CONVOLUTED TUBULE: reabsorption of all glucose, most water, salt, and amino acids -Descending loop of henle: water out -Ascending loop of henle: NaCl out
-Distal Convoluted tubule: ecess ions and other products that are still in the blood selectively transported into the tubule
Anything not given back to the blood is expelled as urine
How to detect proteins?
-Biuret's solution -copper solution that turns purple in the presence of peptide bonds -deep purple= proteins/polypeptides, free amino acids= pale, pink/lavender
How to detect glucose?
-Benedicts solution -blue-->green- negligible -yellow/green- moderate -orange/red- high -produces a color with mono but not disaccharides
How to detect pH ,bilirubin, and ketones?
-a product of the breakdown of hemoglobin from the liver -recycled by the liver, usually made into bile salts -excess bilirubin, means poor liver function
Want to see the other 13 Flashcards in Bio Lab 1: Macromolecules?JOIN TODAY FOR FREE!