Summary
OCR A-Level Biology Liver Summary
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Handwritten Summary by an Oxford Medical Student which covers all content necessary for an A* in the Liver at OCR Biology A-Level.
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Main Metabolic Waste products :CO2 ,
Urea , bile
pigments
Hepatic Artery Supplies blood to the liver
:
Hepatic Vein :
Returns blood to the heart
Hepatic Portal Vein Carries blood
:
from the intestines to the liver s full of digestive product
Hepatocytes liver cells
large nucleus ,
prominent golgi body many mitochondria
:
,
structure of the liver :
· Sinusoids Channels blood from the hepatic and hepatic
where
artery
:
portal vein mix <
bordered by sinusoids
↳ O2 delivered to the
is
hepatocytes
·hupffer Ceus Liver within
Macrophages hepatocytes
:
Bile Canaliculi ductules
Hepatocytes Secrete bile into the bile
:
functions of the Liver:
Builds up breaks down
Carbohydrate Metabolism or
glycogen
:
Deamination of excess anino acids Amino Acids
·
:
Amino combines ~3 CO2
group
&
produce
-
With CO2 to urea
1 0
,
The rest of the molecule
WHO-I onetrone
ornithine
, urea
can be used as a -
substrate
respiratory
Detoxification of :
other metabolic substrates
Catalase enzyme converts H202 to H20 and On
· ethanal s Ethanoate
Alcohol
dehydrogenase convers ethanol
Cirrhosis liver tissue is
replaced by tissue due to alcohol
scar
susually
:
use
↳ die and disrupted
Hepatocytes structure is
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