U4 AOS1 Revision

What role do tears play in protecting the eyes from pathogens?

• They trap microorganisms

• They contain enzymes that kill bacteria

• They cleanse the eyes and contain chemicals inhibiting bacterial growth

• They provide a physical barrier

What are the three components of the innate immune response as depicted in the diagram?

• Immune cells, Soluble proteins, Inflammation

• Antibodies, T-cells, B-cells

• Red blood cells, White blood cells, Platelets

• Hormones, Enzymes, Neurotransmitters

What percentage of white blood cells can eosinophils make up?

• Up to 7%

• 3-80%

• 10-20%

• 1-5%

What percentage of white blood cells do basophils make up?

• Up to 2%

• 5-10%

• 20-30%

• 10-15%

What is the primary function of natural killer (NK) cells?

• Recognize and attack cells lacking 'self' markers

• Transport oxygen throughout the body

• Produce antibodies

• Digest foreign particles

What role do lysosomes play in the process of phagocytosis?

• They identify the pathogen.

• They engulf the pathogen in a vesicle.

• They fuse with the phagosome and release toxic chemicals to digest the pathogen.

• They expel indigestible material from the cell.

What are complement proteins dissolved in?

• Plasma of your blood

• Red blood cells

• White blood cells

• Platelets

Interferons can act in which of the following ways?

• Only endocrine fashion

• Only autocrine fashion

• Autocrine and paracrine fashion

• Only paracrine fashion

What type of cells are immune cells?

• Red blood cells

• White blood cells

• Platelets

• Bone cells

Where are immune cells derived from?

• Liver

• Bone marrow

• Spleen

• Thymus