Ans. Physiological Effects: When the human body is placed under physical or psychological stress, it increases the production of certain hormones such as adrenaline and cortisol. It causes: •Changes in heart-rate. blood-pressure levels. metabolism and physical activity. •Slowing down of digestive system. •Constriction of blood vessels. Cognitive Effects: High levels of stress can lead to: •Mental overload. •Impairment in the ability to make sound decision. •Poor concentration. •Reduced short term memory. Emotional Effects: Those who suffer from stress are more likely to experience: •Mood swings. •Erratic behaviour •Maladjustment with family and friends. •Feeling of anxiety and depression. •Increased physical and psychological tension. •Intolerance. •Impatience.Behavioural Effects: Stress affects our behaviour in the form of: •Eating less nutritional food, •Increasing intake of stimulants such as caffeine or excessive consumption of cigarettes, alcohol and drugs. •Disrupted sleep pattern. •Reduced work performance.