What is the first line of defense in the immune system?

• Cytotoxic T cells

• Macrophages

• Mucous membranes

• Skin

What is the purpose of histamine in the inflammatory response?

• To dilate blood vessels

• To make blood vessels leakier

• To attract macrophages

• To destroy infected cells

What is the complement system?

• A system that complements the actions of the immune system

• A system that specifically targets pathogens

• A system that regulates inflammation

• A system that destroys infected cells

What is the third line of defense in the immune system?

• Humoral response

• First line of defense

• Cell-mediated response

• Inflammatory response

What is the role of cytotoxic T cells in the immune system?

• To attract macrophages

• To produce antibodies

• To dilate blood vessels

• To destroy infected cells

What are antibodies?

• Proteins that dilate blood vessels

• Substances that destroy bacteria

• Proteins that bind to antigens

• Cells that consume pathogens

What is the purpose of memory cells in the immune system?

• To keep a memory of antigens

• To launch an immune response

• To activate cytotoxic T cells

• To activate plasma B cells

What is the function of vaccines?

• To attract macrophages

• To dilate blood vessels

• To destroy infected cells

• To introduce weakened pathogens

What is the main topic of the text?

• The respiratory system

• The circulatory system

• The digestive system

• The immune system

What is the purpose of the immune system?

• To break down food

• To regulate body temperature

• To protect the body from pathogens

• To produce hormones