Assignment task: Arthur (68 years old) has had a vomiting bug for since yesterday afternoon. It is now the morning the day after he started. He still feels nauseas and has not managed to drink anything substantial since yesterday lunch time. He has now stopped vomiting. He thinks that he has not passed urine since last night and does not want to go now. He has a bad headache. He feels very thirsty, and his lips are dry. He decides to try and pass urine and when he passes a small amount he notices that it is coloured quite a dark brown with a strong odour and stings upon voiding. When he stands he also feels very lightheaded and needs to sit down again straight away. He can feel his heart racing. With reference to the renal system, explain what is happening physiologically in this scenario. Want Professional Help?