term1 Definition1term2 Definition2term3 Definition3
Please sign in to your Google account to access your documents:
what are the 5 key biological roles of Calcium
1) muscle contraction
2) nerve excitation
3) blood coagulation
4) intracellular messenger
5) enzymes of intermediary metabolism
what are the % figures for Serum Calcium
FREE --> 47%
BOUND to albumin --> 47%
COMPLEXED --> 6%
which portion of the serum calcium ( free bound or complexed) regulates the feedback mechanisms of the body and is physiologically important
the FREE fraction (47%)
why is total calcium as well as free calcium measures when measuring calcium levels
if a patient has a low albumin conc. then total Ca will also be low, but FREE Ca will be quite normal
what is conc of calcium above which would be regarded as hypercalcaemia
>2.6mmol/l
what is conc of calcium below which would be regarded as hypocalcaemia
<2.2mmol/l
what organs are involved in Ca homeostasis
-kidney
-gut
-bone
-parathyroid glands
--Ca sensing receptors
what are the 2 main hormones of metabolic control of Ca
parathyroid hormone
1,25 - dihydroxycholecalciferol
where does Ca absorption mainly take place
-small intestine
--> duodenum + jejunem
what are the 2 pathways for Ca absorption
1) cell-mediated active transport (controlled by 1,25 DHCC)
2) passive diffusion (depends on lumenal Ca conc) and unaffected by 1,25 DHCC
Need help typing ? See our FAQ (opens in new window)
Please sign in to create this set. We'll bring you back here when you are done.
Discard Changes Sign in
Please sign in to add to folders.
Sign in
Don't have an account? Sign Up »
You have created 2 folders. Please upgrade to Cram Premium to create hundreds of folders!