Unit 6: Immune System Review

Which cells does the immune system heavily rely on to perform its function?

• Red blood cells

• Platelets

• Neurons

• White blood cells (specifically lymphocytes)

What is a pathogen?

• A beneficial bacterium that aids in digestion

• A type of white blood cell

• A microorganism or virus that can cause disease

• A chemical that neutralizes harmful substances

What is an antigen?

• A protein used by the immune system to neutralize pathogens

• Anything that causes an immune response and is recognized as foreign by the body

• A signaling molecule that suppresses immune responses

• A type of white blood cell

What are antibodies?

• Cells that produce antigens

• Signaling molecules that induce immune responses

• Proteins used by the immune system to bind to antigens and neutralize pathogens

• Foreign particles that cause disease

What are the two main types of defense systems in the body?

• Innate Defenses and Adaptive Defenses

• Active Defenses and Passive Defenses

• Internal Defenses and External Defenses

• Primary Defenses and Secondary Defenses

Which line of defense is considered non-specific?

• 1st line of defense

• 2nd line of defense

• 3rd line of defense

• Both 1st and 2nd lines of defense

What is the response time of innate defenses?

• 0-48 hours

• 0-72 hours

• 0-96 hours

• More than 96 hours

Adaptive defenses are characterized by which of the following features?

• Non-specific response

• Rapid response time

• Acquired and remembers

• Immediate action

Which cells are involved in cellular immunity?

• B cells

• Antibodies

• T cells

• Natural killer cells

What does the skin function as in the body's innate defenses?

• A chemical barrier

• A mechanical barrier

• A biological barrier

• An immune response trigger