mass transport

Question 1

loss of heat when sweating is related to the dipole nature of water
justify

Answer 1

water has uneven distribution of charge- making it a dipole
so water forms hydrogen bonds with other water molecules
and it requires a lot of heat/ thermal energy to break these bonds
and allow water to evaporate taking the heat energy with it / high latent heat of evaporation

Question 2

explain how properties of water make it an ideal transport medium

Answer 2

water is a solvent
because water molecules surround polar molecules/ ions
hydrogen bonds form between water molecules and solute molecules
water is a liquid so has the ability to flow

Question 3

type of reaction in which water is involved in breaking of bond

Answer 3

hydrolysis

Question 4

why do animals with large volume need circulation system

Answer 4

larger sa:v ratio
distance to cells in centre of animal is longer
diffusion will be slower and longer