Terms in this set (37)
All organisms produce
What is a metabolic waste?
Toxic wastes that can become deadly if not removed
What are some examples of metabolic wastes?
Excess salts, carbon dioxide and urea
What is urea?
A toxic by-product of protein metabolism
What is the elimination of waste called?
What does the skin excrete?
Water, salts, and a small amount of urea when sweating
What do the lungs excrete?
What does the liver excrete?
Very toxic nitrogen waste (urea and bile)
What is the principle organ of excretion?
What do the kidneys remove?
Urea and waste from the blood
What do the kidneys maintain?
pH and water content of the blood
Where are the kidneys located?
Lower back, on either side of the vertebrae
What is carried through the ureters?
What connects the kidneys and urinary bladder?
How is urine excreted?
Through the urethra
Where is urine stored before excretion?
How is waste-laden blood carried to the kidneys?
By the renal artery
How does clean blood leave the kidneys?
Where are the filtering units of the kidney?
What is the outer layer of the kidney?
What are the filtering units of the kidney?
How many nephrons are in each kidney?
What is the inner layer of the kidney?
How does the waste-laden blood enter the nephron?
Through an arteriole
What is the process of filtering out impurities from the blood?
Where does filtration occur in the nephron?
Where are the impurities collected in the kidney?
How much of the filtered water is reabsorbed by the body?
What is especially concentrated in the urine?
What is a kidney stone?
A build up of calcium, magnesium, or salt that crystalize
Why do kidney stones cause pain?
They block and scratch the ureter
How are kidney stone usually treated?
Use of ultrasound that pulverizes the stones
Where does the reabsorption of water take place in the nephron?
Loop of Henle
What is another term for the collecting duct in a nephron?
What shape are adrenal glands?
Where are the adrenal glands located?
On top of the kidneys
What do the adrenal glands do?
Release hormones to help the body deal with stress