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WorksheetsBlood clotting
Total questions: 10
Worksheet time: 9mins
Which 2 substances are released by platelets?
Serotonin
Thrombin
Fibrin
Thromboplastin
Which reaction is catalysed by thromboplastin?
conversion of prothrombin to thrombin
conversion of prothrombin to fibrin
conversion of thrombin to prothrombin
conversion of fibrinogen to fibrin
Which ions must be present for thromboplastin to work?
Na+
Cl-
Ca2+
H+
Thrombin is an enzyme that converts fibrin to fibrinogen
True
False
What is the role of fibrin in blood clotting?
acts as an enzyme
forms a mesh of fibres to cover the wound
causes smooth muscles in blood vessels to contract
starts off the whole process
Which of the following is not the importance of blood clotting? Choose your answers.
Prevent excessive blood lost
Prevent the entry of pathogen into the blood vessels
Prevent the dropping of blood pressure.
Prevent the entry of oxygen into the blood
Name the blood cell and plasma protein that is responsible in blood clotting mechanism.
Leucocytes
Platelets
Albumin
Fibrinogen
Erythrocytes
Why fibrin mesh is important in blood clotting mechanism?
To attract more platelets.
To attract more erythrocytes.
To destroy pathogens.
To prevent erythrocytes from flowing out.
Ariana lack of clotting factors that cause her blood to unable to clot when she is having a cut.
Name this disease.
Haemophilia
Talasemia
Thrombosis
Embolism
A boy accidentally cut his finger. the blood clots occur slowly. What caused the blood to clot slowly?
Lack of vitamin D in his meal
Lack of vitamin K in his meal
The blood of the boy is infected with pathogens
The blood of the boy flow with high pressure at the wound
