Question 1
Which of these is an excretory product and the organ that excretes it?
- Faeces from the large intestine
- Carbon dioxide from the lungs
- Glucose from the kidneys
- Protein from the skin
Show mark scheme for question 1
Answer: B (1)
Question 2
Name the excretory product lost from the lungs, and name two substances lost from the skin in sweat.
Show mark scheme for question 2
- carbon dioxide (1) allow water vapour
- one from: water / salts / ions / urea (1) allow sodium chloride
- a second different one from: water / salts / ions / urea (1)
- Max 3