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11 Cards in this Set

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What is the major function of the urinary system?
To remove urea from the body
Name the main organs of excretion.
1)kidneys
2)ureters
3)bladder
4)urethra
Urea is formed in the liver from what?
ammonia
Describe the process of the removal or urea.
1)Urea is formed in the liver from ammonia
2)Urea is carried in the bloodstream to the kidneys where it passes with water, salts and acids out of the bloodstream and into the kidney tubles are urine
3)Urine then travels down the ureters into the bladder and out of the body.
Describe the functions of the kidneys.
1)remove urea from the bloodstream
2)maintain the proper balance of water, salts and acids in the body fluids.
3)secrete renin, a substance important in the control of blood pressure
4)secrete erythropoietin which regulates the production of red blood cells
5)secrete a form of Vitamin D, necessary for the absorption of calcium from the intestine
What is electrolytes?
Salts and some acids are known as electrolytes which are necessary for the function of nerve and muscle cells.
What is rein?
An enzyme produced and secreted by the kidneys. This enzyme is important in the control of blood pressure and erythropoietin.
What is etythropoietin?
A cytokine made by the kidneys that stimulates the proliferation of red blood cells.
What is urea?
(urine)waste substance containing nitrogenous waste.
What urinary system organ secretes a form of Vitamin D and why?
The liver. Vitamin D is necessary for the absorption of calcium from the intestine.
What is ammonia?
An alkaline gas, NH3, formed by decomposition of nitrogen-containing substances such as proteins and amino acids.
Ammonia is converted into urea in the liver.