A 22-year-old man presents with red and flaky patches at the corners of his mouth. Upon examination, angular cheilitis is diagnosed. Anamnesis reveals a history of excessive drinking and malnutrition. What is the most probable deficiency responsible for his condition?
Sensorineural deafness is strongly associated with which one of the following?
A 29-year-old male patient with a history of three previous chest infections in the past seven months presents with fever, pleuritic pain and productive cough. Chest x-ray shows lobar consolidation and the diagnosis of a fourth chest infection is established, after sputum culture reveals Haemophilus influenzae. The previous chest infections were due to Streptococcus pneumoniae. After a period of six weeks, a full blood count, urea, CRP, electrolytes and chest x-ray turn out as normal. What is the investigation you would choose next?
Choose the cell organelle involved in the synthesis of lipids:
Choose the correct definition regarding the standard error of the mean:
A study is developed to assess a new anti-hypertensive drug and two groups of patients are randomly chosen. The first group takes an established anti-hypertensive drug for 3 months and the second group receives the new drug, again for 3 months. To assess the efficacy of the new drug, blood pressure is measured before and after taking the drug in both groups of patients. After a period of 1 month off medication, the groups swap medication and blood pressure is measured again, finally the difference in blood pressure after receiving each drug is calculated. Which of the following significance tests would you apply to assess the results of the study?
A study is developed to compare the calcemia of men and women with Crohn’s disease. The objective of the study is to detect any differences between the average calcium levels in men compared to women. Previous studies have shown a normal distribution regarding calcium levels. Which of the the following tests would you most likely apply?
You want to compare a new oral hypoglycaemic drug with an existing treatment, which would also lower HbA1c. Which study design would you choose?
A 68-year-old male patient presents with haematemesis. Gastroscopy and biopsy reveal a carcinoma. Who is the one to inform the patient of his diagnosis?
Which part of the renal tubule is impermeable to water: