Defence Mechanisms (AQA A-Level Biology): Quizzes
📚Quizzes
Practise the questions
10 questions from this quiz
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Practise the questions
10 questions from this quiz
What is immunity?
What is immunity?
State where defenses better tackle same pathogen
Which groups face greater vulnerability to infections?
Which groups face greater vulnerability to infections?
Young children and elderly people
What is a key feature of non-specific defenses?
What is a key feature of non-specific defenses?
They provide immediate protection
Which lymphocytes are involved in the two forms of specific defense responses?
Which lymphocytes are involved in the two forms of specific defense responses?
T lymphocytes and B lymphocytes
What role do surface proteins on cells serve?
What role do surface proteins on cells serve?
Molecular identification tags
What does the immune system identify using protein markers?
What does the immune system identify using protein markers?
Pathogens, toxins, and abnormal cells
How many different types of lymphocytes does the body produce?
How many different types of lymphocytes does the body produce?
Approximately ten million
What happens to lymphocytes with receptors matching self-antigens during development?
What happens to lymphocytes with receptors matching self-antigens during development?
They die or become suppressed
What is clonal selection?
What is clonal selection?
Rapid division of selected lymphocytes
Why is there a time lag between pathogen exposure and effective immune response?
Why is there a time lag between pathogen exposure and effective immune response?
Lymphocytes need time to multiply