1.2 gas exchange and respiration

Question 1

what is inhaled air contained of?

Answer 1

79 % nitrogen
21% oxygen
0.04% carbon dioxide
very little water vapour

Question 2

what is exhaled air contained of?

Answer 2

79% nitrogen
17% oxygen
4% carbon dioxide
a lot water vapour

Question 3

what do we produce when we bur fuel with the help of oxygen? and what is this process called?

Answer 3

energy, water vapour and carbon dioxide. this is called cellular respiration.

Question 4

what do we use energy for?

Answer 4

movement

keeping body temperature constant

replacing and adding cells

Question 5

cellular respiration:

Answer 5

glucose + oxygen = water vapour + carbon dioxide + energy

Question 6

where are the carbon dioxide and water produced during respiration carried back to , by what and where?

Answer 6

carried back to the lungs via the bloosatream in the alveoli

Question 7

what is diffusion?

Answer 7

the movemnt of particles from an area of higher concentration to areas of lower concentration, until the concentrations in both areas are equal . no energy needed.

Question 8

what are lung capillaries?

Answer 8

tiny blood vessels that surround the aleveoli

Question 9

what is cellular respiration?

Answer 9

the proccess by which your cells make energy, carbon dioxide and water vapour from glucose, with the help of oxygen.

Question 10

what is osmosis

Answer 10

the diffusion of water molecules through a partially permeable membrane