Immune System: Innate Defenses

Which of the following is part of the first line of defense:

• antimicrobial proteins

• phagocytes

• skin and mucous membranes

• none of these

Which of the following are part of the second line of defense:

• skin

• mucous membranes

• antimicrobial proteins & phagocytes

• none of these

Which of the following is NOT a protective barrier from the first line of defense?

• pH 3-5 to inhibit bacterial growth

• lysozyme that kills bacteria

• sticky mucous in airways and digestive tract

• macrophages eat foreign invaders

This cell type "eats" invading microorganisms like bacteria and viruses.

• mast cells

• phagocytes

• natural killer cells

Which of the following cell types are primarily associated with allergies?

• phagocytes

• natural killer cells

• mast cells

Which of the following is the body's first response to invaders or injury?

• acid inhibits bacterial growth

• lysozyme kills bacteria

• inflammation

• hydrochloric acid and enzymes kill microorganisms

Which of the following is NOT a sign of inflammation:

• redness

• heat

• swelling

• pain

• itching

Which of the following cell types "police" the body and destroy cancer cells and virus infected cells:

• natural killer cells

• mast cells

• phagocytes

• none of these

Which of the following describes the purpose of a fever:

• pain at the cite with inflammation

• helps protect cells from being invaded by viruses

• an attempt to kill fragile bacteria or viruses

• the accumulation of pus

Which of the following is NOT a beneficial effect of the inflammatory response:

• skin secretions inhibits bacterial growth

• prevents the spread of damaging agents to nearby tissues

• disposes of cell debris

• sets the stage for repair