Gaseous exchange around the body - Unit 4

Question 1

is gaseous exchange an active or passive process

Answer 1

passive

Question 2

capillaries vs veins and arteries

Answer 2

capillaries are tiny blood vessels that are wrapped around the alveoli
arteries and veins are connected by capilarries

Question 3

two things that happen as air enters lungs

Answer 3

oxygen enters air sacs which diffuses into capillaries

CO2 diffuses out of capillaries into air sacs

Question 4

4 adaptations of alveoli

Answer 4

alveoli one cell layer thickkkk and the capillaries are one cell layer thick so diffusion can take place easy and fast

Question 5

haemoglobin

Answer 5

iron containing pigment in red blood cells which transports oxygen

Question 6

oxyhaemoglobin

Answer 6

haemoglobin that has combined with oxygen

Question 7

1 haemoglobin molecule can carry how many oxygen molecules

Answer 7

at most 4

1 minus the P(1 - x>4)

Question 8

is CO2 or oxygen more soluble in blood

Answer 8

CO2 and thus can easily lower the pH level by forming carbonic acid

Question 9

besides from cheing oxygen a lift, what does haemoglobin act as

Answer 9

a buffer, it prevents blood from being too acidic