Which of these is a chemical defence against infection?
Tears
Skin
Cilia
What type of cell engulfs pathogens?
Red blood cells
Phagocytes
Lymphocytes
Which molecules neutralise substances produced by pathogens?
Antigens
Antibodies
Antitoxins
What do antibiotics kill?
Viruses only
Bacteria and viruses
Bacteria only
Who discovered the first antibiotic?
Charles Darwin
Alexander Fleming
Marie Curie
Which of these is a non-specific defence against disease?
Which of these do lymphocytes produce?
Antibiotics
What do goblet cells produce?
Mucus
What do phagocytes produce to destroy pathogens?
Hormones
Bile
Enzymes
What is true of white blood cells in a second exposure to infection?
They are produced more rapidly and in greater numbers
They are produced more slowly but in greater numbers
They are produced more rapidly but in lower numbers