The Excretory System

The regulation of a stable internal environment in your body is technically called ___

• hydroregulation

• homeostasis

• osmosis

• dynamic equilibrium

The excretory system, which includes the kidneys, the ureters, the bladder, and the urethra, is also known as ___

• the bladder system

• the urea system

• the urinary system

• the digestive system

Maintaining the right levels of water and dissolved substances in your body is called ___

• nitrogen balance

• urinary equilibrium

• ureastasis

• osmoregulation

A main byproduct of metabolizing food is ammonia, which is pretty toxic, and comes from breaking down ___

• proteins

• sugars

• fats

• fiber

Mammals, amphibians and some marine animals convert ammonia into ___

• ammonium salts

• uric acid

• urea

• amino acids

What is the main component of the white paste in bird droppings?

• poop

• ammonia

• urea

• uric acid

On an average day your kidneys filter out about 180 liters of fluid from your blood. How much gets peed out?

• 1.5 liters

• 5.1 liters

• 10.5 liters

• 15 liters

Most of you excretory system isn't dedicated to excreting, its dedicated to ___

• transporting

• reabsorbing

• circulating

• locomotion

Each one of your mango sized kidneys has about a million tiny filtering structures called ___

• medullas

• glomerulas

• nephrons

• renals

If you were to unravel all of your nephrons and put them end to end, how far would they stretch?

• almost 20 kilometers

• about 40 kilometers

• about 60 kilometers

• over 80 kilometers