How do substances get into, out of and around our bodies? - OCR 21C

1

Which of these substances would diffuse into a human cell?

2

Which organ system is involved in providing the bloodstream with glucose?

3

Which organ filters urea out of the blood?

4

Which component of blood transports oxygen?

5

What does a partially permeable membrane mean?

6

Which of these animals would have the smallest surface area to volume ratio?

7

What is the name of the blood vessel that takes blood from the heart to the lungs?

8

What is the surface area to volume ratio if a multicellular organism has a surface area of 200 cm2 and a volume of 500 cm3 ?

9

What is active transport?

10

Why do veins and the heart have valves?