iGCSE Excretion

The waste products produced by cellular life processes the most important of which are carbon dioxide, water, urea and mineral salts.

• ATP

• metabolic wastes

• feces

• enzymes

Tags

NGSS.MS-LS2-3

What is the main function of the excretory system?

• to collect and remove wastes from the body
• to strengthen skeletal muscles
• to protect the nervous system
• to bring oxygen to body cells

A nitrogenous waste resulting from the breakdown of the amino acids produced during protein digestion.

• carbon dioxide

• bile

• urea

• water

A short tube where urine is released from the body is the _______.

• Ureter
• Kidney
• Bladder
• Urethra

Place the following events in sequence:
A)  Urine passes through the ureters
B)  Urea enters the kidneys
C)  Urine enters the urethra

• B, A, C
• C, B, A
• B, C, A
• A, C, B

Which substance is NOT found in the liquid in the highlighted parts of a healthy person?

• Glucose

• Salt

• Water

• Urea

These organs are responsible for what?

• storing urine
• storing water
• filtering blood
• they don't have a particular job 

The area influenced by hormones in order to regulate water balance in the body.

• Loop of Henle

• Proximal convoluted tubule

• Glomerulus

• Collecting duct

Which of these is found in larger quantities in the renal artery than in the renal vein.

• glucose

• urea

• water

• oxygen

• carbon dioxide

Excretion

• is the removal of urea only

• is the removal of urine, faeces and sweat

• is the removal of toxic substances, excess and waste products

• is the removal faeces