Invading the Body

Question 1

communicable

Answer 1

diseases caused by pathogens which can be passed from one organism to another

Question 2

bacterial flora

Answer 2

the combination of different species of microorganisms found in or on a specific region of the body

Question 3

sebum

Answer 3

an oily substance produced by the skin which contains chemicals that inhibit the growth of microorganisms

Question 4

lysozymes

Answer 4

enzymes found in tears and other body secretions that are capable of destroying microbial cell walls

Question 5

endotoxins

Answer 5

lipopolysaccharides that are an integral part of the outer layer of the cell wall of Gram-negative bacteria and act as toxins to other cells

Question 6

exotoxins

Answer 6

soluble proteins produced and released into the body by bacteria as they metabolise and reproduce in the cells of their host; these proteins act as toxins in different ways

Question 7

lipopolysaccharides

Answer 7

chemicals made up of a combination of lipids and polysaccharides (complex carbohydrates)