water and transport

Question 1

how is water being solvent efficient

Answer 1

water is solvent means that some substance can be dissolved in it. this makes it easier to transport substance

Question 2

structure of water molecule

Answer 2

2 atoms of hydrogen joined to one atom of oxygen
slightly positive charge (hydrogen)
slightly negative charge (oxygen)
the slightly positive and slightly negative charge makes the water dipolar molecule

Question 3

what is cohesion

Answer 3

attraction between molecules of the sme type

Question 4

how does water being cohesive make it great for transporting

Answer 4

water molecule are very cohesive because they are dipolar, which makes it to help flow and therefore good at transporting

Question 5

water is dipolar means

Answer 5

the slightly positive charge attracts to a neg ion and a slightly negative charge attracts to a pos ion, meaning ion will transport

Question 6

why do multicellular organisms need mass transport system

Answer 6

all cell needs energy, most cell gets energy via aerobic respiration.
diffusion across the outer membrane would be too slow because of the large distance, so therefore the multicellular have mass transport system

Question 7

what is the mass transport system

Answer 7

it is used to carry raw materials from specialised exchange organs to the body cells and to remove metabolic waste

Question 8

examples of metabolic waste

Answer 8

carbon dioxide
urea
ammonium

Question 9

how does mass system transport help diffusion

Answer 9

large SA:V ratio - more diffusion of oxygen in to the blood
short diffusion distance

Question 10

How are the alveoli adapted for gas exchange

Answer 10

large SA:V ratio - more diffusion of oxygen into the blood from the alveoli and the carbon dioxide out of the alveoli

one cell thick - diffusion distance is short

lots of blood cappilaries - to ensure a good blood supply to maintain concentration gradients of oxygen and carbon dioxide