CHAPTER 11.1 (F4): BODY DEFENCE

What is a pathogen?

• A type of body cell

• A microorganism that causes diseases

• A type of immune response

• A harmless bacteria

Which of the following is an example of a pathogen?

• Leukocytes

• Virus

• Bacteria

• Platelets

• Fungus

How do pathogens cause diseases?

• By strengthening the immune system

• By successfully infecting body cells

• By producing vitamins

• By increasing body temperature

What does the body defense system recognize as foreign particles?

• Antibodies

• Antigens

• Enzymes

• Hormones

What are antigens?

• Cells that produce energy

• Foreign particles that stimulate the immune response

• Proteins that transport oxygen

• Molecules that store genetic information

What is the interaction between antibodies and antigens that leads to the destruction of antigens called?

• Metabolic response

• Digestive response

• Immune response

• Respiratory response

What is immunity?

• The body's ability to fight infections caused by pathogens or other foreign objects.

• The body's ability to produce energy from food.

• The body's ability to regulate temperature.

• The body's ability to grow and repair tissues.

What is the first line of defense in the human body against diseases?

• Skin and mucous membranes

• White blood cells

• Antibodies

• Vaccines

Which line of defense involves the immune response?

• First line of defense

• Second line of defense

• Third line of defense

• Fourth line of defense

What does the first line of defence in the body consist of?

• Physical and chemical barriers

• Antibodies and antigens

• White blood cells

• Vaccines