exam qs

Question 1

compare fish and mammal

Answer 1

both have closed circulatory system.
fish has 1 a+v 2 chambers and no septum.mammals have 2a and v 4 chambers w one septum.
fish is less efficient at transporting o2,mammals are more.fish has low metabolic rate mammals has high metabolic rate.fish has low bp, mammals maintained at high pressures.by having single closed CS blood has to flow through capillaries twice, by having double closed blood has to flow through capillaries once.

Question 2

Compare arteries veins and capillaries

Answer 2

Arteries have smaller lumen,smaller diameter,less collagen,more elastic tissue than vein
Capillaries have no elastic tissue no collagen,only once cell thick etc

Question 3

Describe movement of fluid in n out of capillary based on pressures

Answer 3

At arteoriole end when HS pressure higher than oncotic fluid moves out of capillaries
At venue end when HS pressure lower than oncotic pressure fluid moves into capillaries

Question 4

Normal eeg

Answer 4

Has not got atrial fibrillation
Has regular burst of electrical impulses through atria
Electrical impulses only from SAN
Has a defined P phase