Immune System Quiz

What does immunity refer to in the context of the immune system?

• The body's ability to generate heat

• The body's resistance to disease

• The body's response to exercise

• The body's ability to digest food

How can the immune system be classified?

• Colorful vs. transparent

• Functional vs. anatomic

• Organic vs. inorganic

• Active vs. passive

What is the pH range of skin secretions that helps inhibit bacterial growth?

• pH 1–2

• pH 3–5

• pH 6–8

• pH 9–10

What is the role of keratin in the skin as part of the innate defenses?

• It produces antibodies to fight pathogens.

• It acts as a physical barrier and is involved in the sloughing process.

• It secretes hormones to regulate body temperature.

• It absorbs nutrients from the environment.

What is the function of mucus in the digestive and respiratory systems?

• It breaks down food particles for digestion.

• It warms the air entering the lungs.

• It traps pathogens.

• It absorbs oxygen into the bloodstream.

Which component of the digestive system contributes to the innate defense by digesting enzymes?

• Liver

• Stomach acid

• Pancreas

• Intestines

What do saliva and lacrimal fluid have in common regarding innate defenses?

• They both contain mucus.

• They both contain the enzyme lysozyme which destroys bacteria.

• They both contain acid to neutralize pathogens.

• They are both involved in the absorption of nutrients.

What is an example of an organism that can breach innate defenses?

• Common cold virus

• Staphylococcus aureus

• Hookworm larvae

• Influenza virus

Which organism is associated with causing stomach ulcers?

• Escherichia coli

• Helicobacter pylori

• Salmonella

• Streptococcus pneumoniae

Which of the following is NOT a component of the nonspecific cellular and chemical protection in the body's second line of innate defenses?

• Phagocytes

• Antibodies

• Natural killer (NK) cells

• Fever