HA8210
Badges: 11
Rep:
? You'll earn badges for being active around the site. Rep gems come when your posts are rated by other community members.
#1
Report Thread starter 1 year ago
#1
compare and contrast the gas exchange system in mammals and fish (6 marks)
0
reply
Native087
Badges: 18
Rep:
? You'll earn badges for being active around the site. Rep gems come when your posts are rated by other community members.
#2
Report 1 year ago
#2
both maintain concentration gradient of oxygen to maximise absorption, as well as expulsion of carbon dioxide.
both require ATP for gas exchange
Fish absorb the naturally dissolved oxygen in water through gills, using a counter-current mechanism. (water flows through the lamellae in the gills in the opposite direction to the blood)
Humans breathe air as the surface area of alveoli is not enough to supply the entire body with sufficient oxygen.
Fish have a unidirectional flow of water through the gills
Mammals have tidal ventilation

Put together and its 4/5 marks
0
reply
HA8210
Badges: 11
Rep:
? You'll earn badges for being active around the site. Rep gems come when your posts are rated by other community members.
#3
Report Thread starter 1 year ago
#3
(Original post by Native087)
both maintain concentration gradient of oxygen to maximise absorption, as well as expulsion of carbon dioxide.
both require ATP for gas exchange
Fish absorb the naturally dissolved oxygen in water through gills, using a counter-current mechanism. (water flows through the lamellae in the gills in the opposite direction to the blood)
Humans breathe air as the surface area of alveoli is not enough to supply the entire body with sufficient oxygen.
Fish have a unidirectional flow of water through the gills
Mammals have tidal ventilation

Put together and its 4/5 marks
thank you !!!!
1
reply
X

Quick Reply

Attached files
Write a reply...
Reply
new posts
Back
to top
Latest

Do you know what you'll do if you don't get the grades you're hoping for?

Find something else in clearing (3)
23.08%
Take a gap year (3)
23.08%
Resit my exams (4)
30.77%
Look for alternate pathways to the career I want (1)
7.69%
I don't know yet (1)
7.69%
Something else (tell us in the thread) (1)
7.69%

Watched Threads

View All