Anticoagulants, Biology

Assignment Help:

ANTICOAGULANTS

(a) Heparin (hepar = liver) . It is synthesized by mast cells of connective tissue and liver cells. It is a heteropolysaccharide. It increases the effectivity of antithrombin III (a - globulin) which inactivates the thrombin so prevents conversion of fibrinogen into fibrin.

(b) Hirudin. It is an anticoagulant present in the saliva of salivary glands of leech and is mixed with blood of host during its storage in its crop.

(c) Warfarin. It is an anticoagulant of plant origin, which when given to a patient, lowers the formation of prothrombin and factors VII, IX and X from liver cells by lowering the activity of Vitamin K.

(d) Sodium oxalate, sodium citrate and EDT A (Ethylene diamine tetra acetic acid) are used as anticoagulants in blood banks as these bind Ca++, so these are called chelating agents. .

(e) Chilling of blood also delays blood clotting as it lowers the activity of enzymes involved in blood clotting.

 

ROLE OF VITAMIN-K IN BLOOD CLOTTING -

Vitamin K, also called anti-haemorrhagic factor, is a fat soluble vitamin and is essential for the formation of prothrombin from the liver. Deficiency of vitamin K causes hypoprothrombinemia which interferes with blood clotting. Vitamin K is also synthesized by intestinal bacteria.


Related Discussions:- Anticoagulants

Krebs cycle, Krebs Cycle The acetyl  group  of acetyl   co A  is now co...

Krebs Cycle The acetyl  group  of acetyl   co A  is now completey  degraded  stepwise  into  carbon  and hydrogen atoms  in the mitochondria  by a cyclic  sequence of  eight ma

Consistently overwatering a potted tomato plant, Consistently overwatering ...

Consistently overwatering a potted tomato plant will eventually kill it. Using the map, suggest why waterlogged soil results in plant death. O2 cannot reach respiring root cells. T

Explain the process of biosynthetic phase, Describe the process of biosynth...

Describe the process of biosynthetic phase of photosynthesis occurring in the chloroplast. Explain the process of development of root nodules in a leguminous plant. Name the ox

Antiarrhythmic therapy, Patients with heart failure have a high incidence o...

Patients with heart failure have a high incidence of both symptomatic and asymptomatic arrhythmias. About 10 per cent of patients have syncope or presyncope resulting from ventr

Neuropsychological assessmnet of older children, Neuropsychological assessm...

Neuropsychological assessmnet of older children In the recent years, the field of child neuropsychology has undergone tremendous growth. There has been a burgeoning interest in

Fowl pox, F o wl pox Fowl pox is a contagious disease of birds, cause...

F o wl pox Fowl pox is a contagious disease of birds, caused by a member of family Poxviridae, characterized by wart-like nodules on the skin and diphtheritic necrotic membra

List the areas of educating a diabetic patient, Q. List the areas of educat...

Q. List the areas of educating a diabetic patient? 1 Self monitoring of Blood -glucose 2 Urine testing 3 Hypoglycaemia 4 Self Administration of Insulin 5 Foot Care

Are there aquatic and flying mammals, Q. Are there aquatic and flying mamma...

Q. Are there aquatic and flying mammals? Sirenians (dugongs, manatees) and Cetaceans (whales, dolphins) are aquatic mammals Chiropterans (bats) are flying mammals.

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd