1. SAMRAT PRITHVIRAJ CHAUHAN GOVERNMENT
COLLEGE, AJMER
SEMINAR SESSION – 2021-22
SUBMITTED TO – DEPARTMENT OF CHEMISTRY
SEMINAR REPRESENTED BY – ANKIT JOSHI
M.SC. FINAL CHEMISTRY SEM. - (III)
CALCIUM IN BIOLOGICAL
SYSTEM
3. INTRODUCTION :-
Calcium is a bulk essential element which is a
macronutrient require in a large quantity for healthy
growth development & survivability.
Calcium in contribute to the physiology and
biochemistry of organisms cell.
Calcium is divalent cation (0.95A) radius. Since there
is a plenty of it in most natural water.
Calcium is a reactive metal that forms a dark oxide
nitride layer when exposed to air.
The most common calcium compound on earth is
calcium carbonate (CaCo3).
Gypsum (CaSo4.2H2O), anhydride (C4H6O3) fluoride &
apatite Ca5(PO4)OH are also source of calcium.
4. SOURCE :-
It is an important nutrient the daily
intake is approximately
1000mg/day.
Widely distributed in food
substance such as.
Milk -27-35%
Cheese -33%
Beans & Lentils -24%
Nuts -8%
Yogurt -30%
Source : Recommended Directory
intake.(by U.S.)
5. DAILY REQUIREMENT :-
Age – Adjusted daily calcium recommendation.
(from U.S. Institute of medicine RDAS)
Age Calcium (mg/day)
1-3 years - 700
4-8 years - 1000
9-18 years - 1300
19-50 years -1000
>51 years - 1000
6. ROLE OF CALCIUM :-
Calcium is major cation is a structural material like
bones, teeth etc. This biological material consist
largely of calcium carbonate, calcium phosphate is
being deposited & reabsorb and as well act as
buffer far body.
Calcium & Phosphate ion controlled by hormonal
action the form of calcium phosphate that occur in
bone & teeth has some composition as mineral
repitate.
It also involve in enzymatic system including
regulator of muscle contraction transmitter of
nerves pulse & agent of blood coagulation.
8. Calcium distribution in the body around 99% of the
total calcium in the body is in bone with the remaining
1% present in the extra cellular fluid (0.1%) and
cellular organelles (0.9 %).
In the extra cellular compartment, calcium exists as a
free, ionized or active form bound to protein and
complexes to anions, such as bicarbonate, phosphate,
citrate and lactate.
In horses, serum ionized calcium represents 50% to
58 % of the total extracellular calcium.
4-6% ionized and complex calcium are filtered through
the glomerulus (ultra filterable) but are rapidly
reabsorbed by the nephron.
10. Hyperparathyroidism is a condition in which
one or more of your parathyroid glands
become overactive and release (secrete) too
much parathyroid hormone (pth.)
This causes the level of calcium in your blood
to rise, a condition known as hyperkalemia.
Decrease in serum phosphate.
Raised urinary calcium and phosphorous
from bone decalcification and dehydration.
The extra calcium and phosphorous is cost
from soft tissue and bones destroying activity.
12. This disease is characterized by faculty
calcification of bones in children showing
phosphate values 1-2 mg/100
This may be due to
Vit. D Deficiency
A Deficiency of calcium and phosphorous
in the diet.
Poor absorption of calcium from intestine.
Increased serum alkaline phosphatase
activity.
14. Osteoporosis means “Porous Bone” viewed under a
microscope, healthy bone looks like a honey comb.
When osteoporosis occurs, the holes and spaces in
the honey comb are much larger than in healthy bone.
Osteoporotic bones have lost density or mass and
contain abnormal tissue structure.
De-calcification of bones as a result of calcium
deficiency in the diet.
Low vitamin D content of the body.
Fracture of the brittle bones occur even after minor
accident.
Pain due to fracture of vertebrae which may radiate
round the drunk, to the buttocks or down the lages.
15. REFERENCES :-
Essential of Bio-organic Chemistry :-
By Vinay Prabha Sharma
Biochemistry :-
By Gurdeep R. Chatwal
(3rd Edition)