Which vitamin is required for formation of Prothrombin?

Which vitamin is required for formation of Prothrombin?
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1 Answer

Answer :

Vitamin K
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Related questions

Vitamin K is required for (a) change of prothrombin into thrombin (b) synthesis of prothrombin (c) change of fibrinogen to fibrin (d) formation of thromboplastin.

Description : Vitamin K is required for (a) change of prothrombin into thrombin (b) synthesis of prothrombin (c) change of fibrinogen to fibrin (d) formation of thromboplastin.

Last Answer : (b) synthesis of prothrombin

Prothrombin time is prolonged by administering (A) Vitamin K (B) Dicoumarol (C) Calcium (D) Prothrombin

Description : Prothrombin time is prolonged by administering (A) Vitamin K (B) Dicoumarol (C) Calcium (D) Prothrombin

Last Answer : Answer : B

Prothrombin time is prolonged by administering (A) Vitamin K (B) Dicoumarol (C) Calcium (D) Prothrombin

Description : Prothrombin time is prolonged by administering (A) Vitamin K (B) Dicoumarol (C) Calcium (D) Prothrombin

Last Answer : Answer : A

Prothrombin time is prolonged in (A) Vitamin K deficiency (B) Liver damage (C) Both (A) and (B) (D) None of these

Description : Prothrombin time is prolonged in (A) Vitamin K deficiency (B) Liver damage (C) Both (A) and (B) (D) None of these

Last Answer : Answer : C

All the following statements about obstructive jaundice are true except (A) Prothrombin time may be prolonged due to impaired absorption of vitamin K (B) Serum alkaline phosphatase may be raised due to increased release of the enzyme from liver cells (C) Bile salts may enter systemic circulation due to biliary obstruction (D) There is no defect in conjugation of bilirubin

Description : All the following statements about obstructive jaundice are true except (A) Prothrombin time may be prolonged due to impaired absorption of vitamin K (B) Serum alkaline phosphatase may be raised ... systemic circulation due to biliary obstruction (D) There is no defect in conjugation of bilirubin

Last Answer : Answer : B

Prothrombin time remains prolonged even after parenterals administration of vitamin K in (A) Haemolytic jaundice (B) Liver damage (C) Biliary obstruction (D) Steatorrhoea

Description : Prothrombin time remains prolonged even after parenterals administration of vitamin K in (A) Haemolytic jaundice (B) Liver damage (C) Biliary obstruction (D) Steatorrhoea

Last Answer : Answer : B

The standard management oral anticoagulant therapy for chronic treatment of venous thromboembolism is with the drug warfarin. Which of the following statement(s) is/are true concerning the administration of warfarin? a. An important complication of warfarin therapy is skin necrosis in patients with protein C deficiency b. Warfarin interferes with vitamin K dependent clotting factors II, VII, IX, X c. For effective anticoagulation the prothrombin time (PT) should be kept at 2 control d. It is recommended that warfarin be continued for at least one year after initial episode of deep venous thrombosis

Description : The standard management oral anticoagulant therapy for chronic treatment of venous thromboembolism is with the drug warfarin. Which of the following statement(s) is/are true concerning the administration ... warfarin be continued for at least one year after initial episode of deep venous thrombosis

Last Answer : Answer: a, b Warfarin interferes with the vitamin K dependent clotting factors II, VII, IX and X, protein C, and protein S. An important complication of warfarin is skin ... the benefit from anticoagulant therapy and thus is the basis for discontinuing warfarin administration at this time

The transfusion of fresh frozen plasma (FFP) is indicated for which of the following reasons? A. Volume replacement. B. As a nutritional supplement. C. Specific coagulation factor deficiency with an abnormal prothrombin time (PT) and/or an abnormal activated partial thromboplastin time (APTT). D. For the correction of abnormal PT secondary to warfarin therapy, vitamin K deficiency, or liver disease.

Description : The transfusion of fresh frozen plasma (FFP) is indicated for which of the following reasons? A. Volume replacement. B. As a nutritional supplement. C. Specific coagulation factor deficiency ... the correction of abnormal PT secondary to warfarin therapy, vitamin K deficiency, or liver disease.

Last Answer : Answer: CD DISCUSSION: The use of FFP as a volume expander is not indicated. There are currently several preparations (both crystalloid and colloid) that are equally effective and do not carry the infectious and ... vitamin K-dependent factors II, VII, IX, and X, as well as protein C and protein S

The specific role of Vitamin K is in the synthesis of - (1) Albumin. (2) Antibodies (3) Globulin (4) Prothrombin

Description : The specific role of Vitamin K is in the synthesis of - (1) Albumin. (2) Antibodies (3) Globulin (4) Prothrombin

Last Answer : (4) Prothrombin Explanation: Vitamin K is a necessary participant in synthesis of several proteins that mediate both coagulation and anticoagulation. It is noteworthy for the synthesis of Prothrombin ( ... in the clotting process. Vitamin K is integrally involved in the clotting mechanism of blood.

Which of the following is not true about warfarin, a. INR of 3 is enough to start any extraction. b. Affects extrinsic system and increases prothrombin time. c. Heparin can be given subcutaneously and acts rapidly. d. It takes at least 12 hours for Vitamin K to reverse the effects of coumarin.

Description : Which of the following is not true about warfarin, a. INR of 3 is enough to start any extraction. b. Affects extrinsic system and increases prothrombin time. c. Heparin can be given subcutaneously ... rapidly. d. It takes at least 12 hours for Vitamin K to reverse the effects of coumarin.

Last Answer : d. It takes at least 12 hours for Vitamin K to reverse the effects of coumarin.

Which of the following is not true about warfarin, ** A. INR of 3 is enough to start any extraction B. Affects extrinsic system and decreases prothrombin time C. Heparin can be given subcutaneously and acts rapidly D. It takes up to 12 hours for Vitamin K to reverse the effects of warfarin

Description : Which of the following is not true about warfarin, ** A. INR of 3 is enough to start any extraction B. Affects extrinsic system and decreases prothrombin time C. Heparin can be given subcutaneously and acts rapidly D. It takes up to 12 hours for Vitamin K to reverse the effects of warfarin

Last Answer : B. Affects extrinsic system and decreases prothrombin time

The specific role of Vitamin K is in the synthesis of (1) Albumin (2) Antibodies (3) Globulin (4) Prothrombin

Description : The specific role of Vitamin K is in the synthesis of (1) Albumin (2) Antibodies (3) Globulin (4) Prothrombin

Last Answer : Prothrombin

Vitamin A is required for the formation of a light receptor protein known as (A) Globulin (B) Lypoprotein (C) Chomoprotein (D) Rhodospin

Description : Vitamin A is required for the formation of a light receptor protein known as (A) Globulin (B) Lypoprotein (C) Chomoprotein (D) Rhodospin

Last Answer : Answer : D

The vitamin required for the formation of hydroxyproline (in collagen) is (A) Vitamin C (B) Vitamin A (C) Vitamin D (D) Vitamin E

Description : The vitamin required for the formation of hydroxyproline (in collagen) is (A) Vitamin C (B) Vitamin A (C) Vitamin D (D) Vitamin E

Last Answer : Answer : A

What is the importance of prothrombin in blood clotting? -Biology

Description : What is the importance of prothrombin in blood clotting? -Biology

Last Answer : answer:

What is prothrombin? -Biology

Description : What is prothrombin? -Biology

Last Answer : answer:

What is prothrombin ?

Description : What is prothrombin ?

Last Answer : : Prothrombin is the name of a type of protein.

Assertion `:-` Porthrombinase enzymes converts prothrombin into active thrombin. Reason`:` Thrmoboplastin react with plasma protein in the presece of

Description : Assertion `:-` Porthrombinase enzymes converts prothrombin into active thrombin. Reason`:` Thrmoboplastin react with plasma protein in the presece of

Last Answer : Assertion `:-` Porthrombinase enzymes converts prothrombin into active thrombin. Reason`:` Thrmoboplastin ... If both Assertion & Reason are false.

Assertion: Heparin is an anticoagulant found in mammals. Reason: Heparin prevents the conversion of prothrombin to thrombin

Description : Assertion: Heparin is an anticoagulant found in mammals. Reason: Heparin prevents the conversion of prothrombin to thrombin

Last Answer : Assertion: Heparin is an anticoagulant found in mammals. Reason: Heparin prevents the conversion of ... . If both Assertion & Reason are false.

Prothrombin is found in `:-`

Description : Prothrombin is found in `:-`

Last Answer : Prothrombin is found in `:-` A. Intestine and helps in cellulose digestion B. Liver and helps in ... red colour D. Blood and helps in blood clotting

Prothrombin , albumin and fibrinogen are synthesised by

Description : Prothrombin , albumin and fibrinogen are synthesised by

Last Answer : Prothrombin , albumin and fibrinogen are synthesised by A. Pancreas B. Bone marrow C. Spleen D. Liver

Prothrombin time (PT)?

Description : Prothrombin time (PT)?

Last Answer : DefinitionProthrombin time (PT) is a blood test that measures the time it takes for the liquid portion (plasma) of your blood to clot.See also: Partial thromboplastin time (PTT)Alternative NamesPT; Pro ... example, blood thinners can affect the results of this test.Do not stop taking any medicine w

A test to evaluate detoxifying function of liver is (A) Serum albumin: globulin ratio (B) Galactose tolerance test (C) Hippuric acid test (D) Prothrombin time

Description : A test to evaluate detoxifying function of liver is (A) Serum albumin: globulin ratio (B) Galactose tolerance test (C) Hippuric acid test (D) Prothrombin time

Last Answer : Answer : C

Prothrombin is synthesised in (A) Erythrocytes (B) Reticulo-endothelial cells (C) Liver (D) Kidneys

Description : Prothrombin is synthesised in (A) Erythrocytes (B) Reticulo-endothelial cells (C) Liver (D) Kidneys

Last Answer : Answer : C

In parenhymatous liver disease the prothrombin time (A) Remains normal (B) Increases (C) Decreases (D) Responds to Vit K

Description : In parenhymatous liver disease the prothrombin time (A) Remains normal (B) Increases (C) Decreases (D) Responds to Vit K

Last Answer : Answer : B

In obstructive jaundice prothrombin time (A) Remains normal (B) Decreases (C) Responds to vit K and becomes normal (D) Responds to vit K and increases

Description : In obstructive jaundice prothrombin time (A) Remains normal (B) Decreases (C) Responds to vit K and becomes normal (D) Responds to vit K and increases

Last Answer : Answer : C

The normal levels of prothrombin time is about (A) 2 sec (B) 4 sec (C) 14 sec (D) 10–16 sec

Description : The normal levels of prothrombin time is about (A) 2 sec (B) 4 sec (C) 14 sec (D) 10–16 sec

Last Answer : Answer : C

Bleeding complications are frequently associated with fibrinolytic therapy. Which of the following statement(s) concerning complications of fibrinolytic therapy is/are true? a. Careful monitoring of prothrombin time and aPTT time are necessary to avoid bleeding complications b. A level of serum fibrinogen less than 100 mg/dl is associated with an increased risk of bleeding c. Recent (less than 10 days) major surgery is a contraindication to systemic but not regional fibrinolytic therapy d. A patient with a cerebrovascular event occurring less than two months ago can be treated with fibrinolytic therapy if head CT scan is normal

Description : Bleeding complications are frequently associated with fibrinolytic therapy. Which of the following statement(s) concerning complications of fibrinolytic therapy is/are true? a. Careful monitoring of prothrombin time ... months ago can be treated with fibrinolytic therapy if head CT scan is normal

Last Answer : Answer: b Fibrinolytic therapy induces a hemostatic defect through a combination of factors. Hypofibrinogenemia and fibrin degradation products inhibit fibrin polymerization and, in combination ... is considered a major relative contraindication to either regional or systemic thrombolytic therapy

A 67-year-old male with advanced cholangiocarcinoma develops gram-negative sepsis. Excessive bleeding is noted around vascular catheters and from needle puncture sites. The diagnosis of disseminated intervascular coagulation (DIC) is considered. Which of the following laboratory test(s) is/are indicative of DIC? a. Decreased platelet count b. Decreased fibrinogen level c. Normal prothrombin time d. Elevated fibrin split products

Description : A 67-year-old male with advanced cholangiocarcinoma develops gram-negative sepsis. Excessive bleeding is noted around vascular catheters and from needle puncture sites. The diagnosis of disseminated ... b. Decreased fibrinogen level c. Normal prothrombin time d. Elevated fibrin split products

Last Answer : Answer: a, b, d Disseminated intravascular coagulation (DIC) is the primary form of acute thrombosis. Causes of this syndrome include abruptio placenta, gram-positive and gram-negative sepsis, ... decline in the platelet count and fibrinogen level, along with an elevation of fibrin split products

Von Willebrand’s disease is a common, congenital bleeding disorder. Which of the following statement(s) is/are true concerning Von Willebrand’s disease? a. As in hemophilia, it is much more common in men b. A history of spontaneous bleeding is common c. Screening laboratory tests will include a prolonged aPTT with a normal prothrombin time d. Pre-treatment for elective surgery require administration of cryoprecipitate to achieve levels of 23–50% of normal

Description : Von Willebrand's disease is a common, congenital bleeding disorder. Which of the following statement(s) is/are true concerning Von Willebrand's disease? a. As in hemophilia, it is ... -treatment for elective surgery require administration of cryoprecipitate to achieve levels of 23-50% of normal

Last Answer : Answer: c, d Von Willebrand's factor is an adhesive protein that mediates platelet adhesion to collagen. In addition, it protects and prevents the rapid removal of factor VIII ... platelet aggregation responses to ristocetin. The most reliable source of Von Willebrand's factor is cryoprecipitate

Which of the following statement(s) is/are true concerning hemophilia A? a. Hemophilia A is inherited as a sex-linked recessive deficiency of factor VIII b. A positive family history for bleeding disorders present in all patients c. Laboratory tests reveal a prolongation of aPTT, prothrombin time (PT), thrombin clotting time and platelet aggregation d. Spontaneous bleeding is unusual with factor VIII levels greater than 10% of normal

Description : Which of the following statement(s) is/are true concerning hemophilia A? a. Hemophilia A is inherited as a sex-linked recessive deficiency of factor VIII b. A positive family history for ... platelet aggregation d. Spontaneous bleeding is unusual with factor VIII levels greater than 10% of normal

Last Answer : Answer: a, d Hemophilia A is inherited as a sex-linked recessive deficiency of factor VIII although 0% of cases are secondary to spontaneous mutation. The incidence of this abnormality is ... factor levels as low as 1% have been noted and patients are at risk for spontaneous bleeding

Tests of coagulation are used to monitor anticoagulation treatment and detect intrinsic abnormalities in coagulation. Which of the following statement(s) is/are true concerning coagulation tests? a. Prothrombin time (PT) measures both the intrinsic and extrinsic clotting pathways and fibrinogen b. Activated partial thromboplastin time (aPTT) can be used to monitor both oral anticoagulation with Warfarin and intravenous anticoagulation with heparin c. Thrombin clotting time (TCT) is a measurement of the time it takes for exogenously administered thrombin to turn plasma fibrinogen into fibrin clot d. Whole blood activated clotting time (ACT) is a measurement of the ability of whole blood to clot and is used to monitor heparin levels intraoperatively during cardiovascular and peripheral vascu

Description : Tests of coagulation are used to monitor anticoagulation treatment and detect intrinsic abnormalities in coagulation. Which of the following statement(s) is/are true concerning ... is used to monitor heparin levels intraoperatively during cardiovascular and peripheral vascular operations

Last Answer : Answer: a, c, d Coagulation tests include prothrombin time (PT), which measures the intrinsic and extrinsic pathways of fibrinogen production and is the most common method for ... more while for peripheral vascular applications, values of 250 seconds or greater are considered appropriate

Which of the following statement(s) concerning laboratory studies used in monitoring a patient with intravenous heparinization is/are correct? a. The platelet count should be followed because of the risk of heparin-associated thrombocytopenia b. The prothrombin time should be observed if prolonged treatment is necessary c. The activated partial thromboplastin time (aPTT) should be maintained at approximately 1.5 times normal d. The serum creatinine should be measured daily to allow adjustments in dose based on renal function

Description : Which of the following statement(s) concerning laboratory studies used in monitoring a patient with intravenous heparinization is/are correct? a. The platelet count should be followed because of the ... serum creatinine should be measured daily to allow adjustments in dose based on renal function

Last Answer : Answer: a, c In monitoring the effect of heparin, an activated partial thromboplastin time (aPTT) of 1.5 control or a thrombin clotting time (TCT) of 2 times control reflects adequate ... system. Therefore the dose of heparin need not be adjusted in cases of liver or renal dysfunction

The evaluation of a patient scheduled for elective surgery should always include the following as tests of hemostasis and coagulation: A. History and physical examination. B. Complete blood count (CBC), including platelet count. C. Prothrombin time (PT) and activated partial thromboplastin time (APTT). D. Studies of platelet aggregation with adenosine diphosphate (ADP) and epinephrine.

Description : The evaluation of a patient scheduled for elective surgery should always include the following as tests of hemostasis and coagulation: A. History and physical examination. B. Complete blood count ( ... (APTT). D. Studies of platelet aggregation with adenosine diphosphate (ADP) and epinephrine.

Last Answer : Answer: A DISCUSSION: The evaluation of most patients scheduled for elective surgery who do not have a history of significant bleeding disorders is somewhat controversial. An adequate history and ... suspected of having qualitative defects of platelet function (e.g., von Willebrand's disease)

The termination of heparin activity by protamine sulfate is due to (a) A chelating action (b) The inhibition of gastrointestinal absorption of heparin (c) The displacement of heparin-plasma protein binding (d) An acid-base interaction (e) The prothrombin-like activity of protamine

Description : The termination of heparin activity by protamine sulfate is due to (a) A chelating action (b) The inhibition of gastrointestinal absorption of heparin (c) The displacement of heparin-plasma protein binding (d) An acid-base interaction (e) The prothrombin-like activity of protamine

Last Answer : Ans: D

Which one of the following statements about cefotetan is accurate? (a) It is active against MRSA strains (b) It is the drug of choice in community-acquired pneumonia (c) It is a fourth-generation cephalosporin (d) It decreases prothrombin time (e) Its antibacterial spectrum include Bacteroides fragilis

Description : Which one of the following statements about cefotetan is accurate? (a) It is active against MRSA strains (b) It is the drug of choice in community-acquired pneumonia (c) ... fourth-generation cephalosporin (d) It decreases prothrombin time (e) Its antibacterial spectrum include Bacteroides fragilis

Last Answer : Ans: E

Blood fails to clot white flowing in the blood vessel because of the presence of - (1) Hepatin (2) Prothrombin (3) liaemoglobin (4) Iltrudin

Description : Blood fails to clot white flowing in the blood vessel because of the presence of - (1) Hepatin (2) Prothrombin (3) liaemoglobin (4) Iltrudin

Last Answer : (1) Hepatin Explanation: Heparin also known as unfractionated heparin, a highly sulfated glycosaminoglycan, is widely used as an injectable anticoagulant, and has the highest negative charge density of any known biological molecule.

Blood does not clot in the blood vessels due to the presence of – (1) Thrombin (2) Fibrinogen (3) Heparin (4) Prothrombin

Description : Blood does not clot in the blood vessels due to the presence of – (1) Thrombin (2) Fibrinogen (3) Heparin (4) Prothrombin

Last Answer : (3) Heparin Explanation: There are two major facets of the clotting mechanism — the platelets, and the thrombin system. The thrombin system consists of several blood proteins that, when bleeding occurs, become activated.

Prothrombin which helps in clotting of blood is released by?

Description : Prothrombin which helps in clotting of blood is released by?

Last Answer : blood platelets

The prothrombin time a. assess the extrinsic pathway of the blood coagulation cascade b. is prolonged in patients with fat absorption c. is increased by warfarin d. all above

Description : The prothrombin time a. assess the extrinsic pathway of the blood coagulation cascade b. is prolonged in patients with fat absorption c. is increased by warfarin d. all above

Last Answer : all above

The prothrombin time a. assess the extrinsic pathway of the blood coagulation cascade b. is prolonged in patients with fat absorption c. is increased by warfarin d. is increased by heparin

Description : The prothrombin time a. assess the extrinsic pathway of the blood coagulation cascade b. is prolonged in patients with fat absorption c. is increased by warfarin d. is increased by heparin

Last Answer : assess the extrinsic pathway of the blood coagulation cascade

A 50 years-old man presented after a full mouth extraction complaining that he ”bled all night”. Which of the following pre. existing conditions could be responsible for the post operative bleeding: a. Blood pressure reading of 140/80 b. Gastric ulcer. c. Elevated prothrombin time. d. None of the above.

Description : A 50 years-old man presented after a full mouth extraction complaining that he bled all night . Which of the following pre. existing conditions could be responsible for the post operative bleeding: a. Blood ... 140/80 b. Gastric ulcer. c. Elevated prothrombin time. d. None of the above.

Last Answer : c. Elevated prothrombin time.

A patient on dicoumarol treatment needs extraction. Which of the following is MOST valuable in evaluating surgical risks: A. Clotting time B. Bleeding time C. Prothrombin time D. Sedimentation rate E. Complete blood cell count

Description : A patient on dicoumarol treatment needs extraction. Which of the following is MOST valuable in evaluating surgical risks: A. Clotting time B. Bleeding time C. Prothrombin time D. Sedimentation rate E. Complete blood cell count

Last Answer : C. Prothrombin time

A 50 years old man presents after a full mouth extraction complaining that he “bled all night”. Which of the following pre existing conditions could be responsible for the post operative bleeding: A. Blood pressure reading of 180/110 B. Gastric ulcer C. Elevated prothrombin time D. A & C are correct E. None of the above

Description : A 50 years old man presents after a full mouth extraction complaining that he bled all night . Which of the following pre existing conditions could be responsible for the post operative bleeding: A. Blood ... ulcer C. Elevated prothrombin time D. A & C are correct E. None of the above

Last Answer : D. A & C are correct

Patient with haemophilia presents which of the following findings:** A. Increased prothrombin time B. Increased bleeding time C. Increased clotting time

Description : Patient with haemophilia presents which of the following findings:** A. Increased prothrombin time B. Increased bleeding time C. Increased clotting time

Last Answer : A. Increased prothrombin time

Patient on anti-coagulant therapy requires an extraction to be performed. Which of the following is NOT true: A. Minor post operative bleedings can be reduced somehow by using tranexamic acid B. Prothrombin value (INR) of 3 is enough to perform extraction C. It takes at least 8 hours for heparin to take effects D. Heparin should be administered sub-cutaneous

Description : Patient on anti-coagulant therapy requires an extraction to be performed. Which of the following is NOT true: A. Minor post operative bleedings can be reduced somehow by using tranexamic acid B. ... takes at least 8 hours for heparin to take effects D. Heparin should be administered sub-cutaneous

Last Answer : C. It takes at least 8 hours for heparin to take effects

The following statements are true of oral anticoagulants except: A. They interfere with an early step in the synthesis of clotting factors B. Irrespective of the dose administered, their anticoagulant effect has a latency of onset of 1-3 days C. Their dose is adjusted by repeated measurement of prothrombin time D. They are contraindicated during pregnancy

Description : The following statements are true of oral anticoagulants except: A. They interfere with an early step in the synthesis of clotting factors B. Irrespective of the dose administered, their ... dose is adjusted by repeated measurement of prothrombin time D. They are contraindicated during pregnancy

Last Answer : A. They interfere with an early step in the synthesis of clotting factors

Blood level of which clotting factor declines most rapidly after the initiation of warfarin therapy: A. Factor VII B. Factor IX C. Factor X D. Prothrombin

Description : Blood level of which clotting factor declines most rapidly after the initiation of warfarin therapy: A. Factor VII B. Factor IX C. Factor X D. Prothrombin

Last Answer : A. Factor VII

Low doses of heparin prolong: A. Bleeding time B. Activated partial thromboplastin time C. Prothrombin time D. Both ‘B’ and ‘C’

Description : Low doses of heparin prolong: A. Bleeding time B. Activated partial thromboplastin time C. Prothrombin time D. Both ‘B’ and ‘C’

Last Answer : B. Activated partial thromboplastin time