Physical defences against disease

Question 1

Skin

Answer 1

Unbroken, dry skin provides a covering to prevent microbes getting in

Question 2

Skin

Answer 2

Unbroken, dry skin provides a covering to prevent microbes getting in

Question 3

Mucus

Answer 3

A sticky liquid that traps microbes in the nose and trachea

Question 4

Coughing

Answer 4

Moves microbe-containing mucus out of the windpipe

Question 5

Stomach

Answer 5

Acid kills most microbes; poisons are removed by sickness and diarrhoea

Question 6

Vaginal mucus

Answer 6

The low pH protects against some infections, as do the normal population of bacteria

Question 7

Eyes

Answer 7

The blink reflex provides protection; microbes are washed out by a watery fluid containing lysozyme enzymes

Question 8

Trachea

Answer 8

The trachea contains cilia, which move mucus to the back of the throat to be spat out or swallowed

Question 9

Scab

Answer 9

Platelets weave a scab that covers an open wound; infections are destroyed by white blood cells

Question 10

Mucus

Answer 10

A sticky liquid that traps microbes in the nose and trachea

Question 11

Coughing

Answer 11

Moves microbe-containing mucus out of the windpipe

Question 12

Stomach

Answer 12

Acid kills most microbes; poisons are removed by sickness and diarrhoea

Question 13

Vaginal mucus

Answer 13

The low pH protects against some infections, as do the normal population of bacteria

Question 14

Eyes

Answer 14

The blink reflex provides protection; microbes are washed out by a watery fluid containing lysozyme enzymes

Question 15

Trachea

Answer 15

The trachea contains cilia, which move mucus to the back of the throat to be spat out or swallowed

Question 16

Scab

Answer 16

Platelets weave a scab that covers an open wound; infections are destroyed by white blood cells