logo

Cambridge IGCSE Biology practice

Paper 3 structured question: Blood

Try the question first, then check the answer and practise the same topic again.

Attempt questionBlood revisionRevise the key idea

At a glance

3

Paper

2

Marks

Topic

Blood

Exam-style question

Try this first

Paper 3Theory (Core)2 marks

Blood clotting involves platelets and fibrin to stop bleeding and protect the body.

Diagram Description

Blood Clot Formation

Platelets stick to the damaged blood vessel and release chemicals. These chemicals convert fibrinogen into fibrin, which forms a mesh trapping blood cells to form a clot.

  1. a

    State the role of platelets in blood clotting.

    Aim for approximately 1 distinct marking point.

    [1]
  2. b

    State the role of fibrin in blood clotting.

    Aim for approximately 1 distinct marking point.

    [1]

0 of 2 parts answered

Answer every part before opening the mark scheme.

Common mistake

No common mistake is linked to this question yet.

Related flashcards

Flashcard 1 of 6

Press Space to flip, arrows to move

Related practice questions

Question 1 of 5

Choose an answer, get feedback, then move sideways through the set.

0 of 4 attempted

Paper 3 structured question: Blood

Paper 3Theory (Core)2 marks

Description

Blood Clotting Process

When a blood vessel is injured, platelets stick to the damaged area and release chemicals. These chemicals cause fibrinogen to change into fibrin, which forms a mesh trapping blood cells and forming a clot.

  1. a

    State one way blood clotting prevents blood loss.

    Aim for approximately 1 distinct marking point.

    [1]
  2. b

    Identify one way blood clotting helps prevent infection.

    Aim for approximately 1 distinct marking point.

    [1]