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Explain how urine is formed and removed from the human body.

      

Explain how urine is formed and removed from the human body.

  

Answers


Lydia
The afferent arteriole supplies blood to glomerulus; The afferent arteriole has wider diameter than efferent arteriole;
This causes high pressure; leading ultra-filtration; of Glucose, amino acids, salts; urea and water filter into Bowman’s capsule; to form glomerular filtrate; WBC/RBC/ Blood cells, proteins are too large to pass through the capillary wall hence Remain in blood capillaries;
The filtrate flows to the P.C.T;
When amino acids, all glucose are selectively reabsorbed; back into blood stream; Many mitochondria provide energy for reabsorption / for active transport /against a conc gradient; The filtrate flows into loop of Henle moves by osmosis into the blood capillaries; Nacl is actively pumped from ascending arm into blood capillaries;
The filtrate flows into P.C.T; water is reabsorbed; salts reabsorbed; from D.C.T; The filtrate flows into collecting duct; where more water is reabsorbed; ADH influences the amount of water reabs;
The filtrate from collecting duct now referred to as urine / acc. Contents of urine e.g. excess salts, excess water, wastes products / is emplied into ureter into bladder; and out of the body through urethra.
lydiajane74 answered the question on October 27, 2017 at 14:12


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