Level 200 past questions in anatomy, physiology, biochemistry and pharmacology, sorted by module and topic, with an explanation for every option and a readiness score for every topic.
Try one
MSPC 237, gas transport
Which of these shifts the oxygen-haemoglobin dissociation curve to the right?
2,3-BPG binds deoxyhaemoglobin and lowers its affinity for oxygen, so the curve moves right and more oxygen is unloaded in the tissues. Cold, alkalosis, a low PCO2 and fetal haemoglobin all shift it left.