Unit 13 Flashcards
where is carbon dioxide excreted from
the lungs
what do the kidneys excrete
urea and excess water and ions
what happens to excess amino acids
converted into urea in the liver through deamination
what is deamination
the removal of the nitrogen containing part of amino acids molecules to form urea
what does the renal artery do
takes blood to the kidneys and taken out by the renal vei
what is the cortex
the outer part where blood is filtered and some reabsorption happens
what is the medulla
the inner part where some reabsorption happens and fluid is collected to form urine
how many nephrons does a kidney have
around a million
what is the glomerulus in the nephron
found in ‘Bowmans capsule’ and where blood is filtered through a network of capillaries
what is filtered out of the blood in the glomerulus
all the glucose is reabsorbed
some of the ions
and most of the water is reabsorbed back into the blood
what is urine created from
contains urea, excess water and excess ions
where do the nephrons travel through
starts in the cortex, travels through the medulla and back to cortex
what is ultrafiltration
when blood is filtered through the glomerulus under high pressure
role of the kidneys
maintain regular water levels
filter blood
what happens if there are high levels of urea
cell death, reduced response to insulin, deposits inside blood vessels
