B3.3.3 - Maintaining Water Balance Flashcards
How do water and salts enter your body?
Consumption, respiration (only water)
How are water and salts lost from your body?
Sweating / Urine, Exhaling (only water)
What is the removal of waste products called?
Excretion
What will happen if there is too much water in your blood plasma?
The water will move into your blood cells and cause them to burst (lysis)
What will happen if there is too little water in your blood plasma?
The water will diffuse from your cells into your blood plasma and cause your blood cells to shrink
What is urine?
A solution containing water, urea and other waste substances
Why must your body remove urea?
It is toxic
How is urine produced?
Your kidneys filter urea from out of your blood and produces urine constantly
Where is urine stored until you need to urinate?
Bladder
What is the ureter?
The tube which urine travels through from the kidney to the bladder
What is the urethra?
The tube through which urine passes out of your body
What does the renal artery do?
Brings blood containing urea and other substances into the kidney
Why can blood cells not go into the tubes to the kidney?
They are too large
What is selective reabsorption?
The process of kidneys filtering back any useful substances into the blood
How do kidneys balance the amount of wateryou take in with the amount you lose through sweating and exhaling?
It alters the amount of urine you produce (if you have little water, it will produce little urine, while if you have lots of water, it will produce lots of urine)
