reflexes

• vomit?

  contractions of diaphragm and abdominal muscles work to evacuate stomach contents
• sneeze?

  nasal cavity irritation -> expulsion of irritants through nose and mouth
• cough?

  respiratory tract irritation -> expulsion of irritants through mouth
• diarrhoea?

  intestines irritated and rate of contraction of muscles in wall increases to expel the irritant