A 53 year old man on anticoagulation presents with pain over his anterior abdomen following an episode of coughing A CT scan identifies an isolated haematoma within the rectus sheath above the arcuate line Which artery is most likely to have been injured?

An 80 year old man presents with abdominal pain and diarrhoea He is diagnosed with Clostridium difficile colitis. What is the most likely cause of the toxic effects of this bacteria?

A 33 year old man presents with epigastric pain
What best describes the function of the gastric chief cell'?

A patient presents with acute cardiac failure and is prescribed a loop diuretic In which part of the nephron will the diuretic inhibit the sodium-potassium-chloride cotransporter?

A 70 year old woman presents with reduced I6vel of consciousness following a recent chest infection She has signs of meningeal irritation Gram staining of CSF demonstrates gram positive diplococci.
Which organism is most likely in this case1?