IGCSE Excretion

What is the outermost layer of the kidneys?

• glomerulus
• medulla
• pelvis
• cortex

The lungs, kidney and skin are all part of the

• nervous system
• nephron
• kidney
• excretory system

Which of the following mainly excretes water and heat?

• skin
• kidney
• lungs
• urethra

These organs are responsible for what?

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

What is #4?

• Kidney
• Ureter
• Bladder
• Urethra

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

• carbon dioxide

• bile

• urea

• water

The cluster of capillaries within a nephron.

• glomerulus

• alveoli

• aorta

• vein

The functional unit of the kidneys which includes the glomerulus, Bowman's capsule and the Loop of Henle.

• arteriole

• veinule

• alveoli

• nephron

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

what do the lungs do in the excretory system

• dispose of carbon dioxide through exhalation
• disposes of smog thru exhalation
• dispose of ultraviolet rays through exhalation
• dispose of rays through exhalation