This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Physiology
[{'content': 'Thyroid hormones in blood is transpoed by: \nSelect and explain. \nA. Albumin, B. Globulin, C. Prealbumin, D. All', 'role': 'user'}, {'content': 'Answer: D \nExplanation: A i.e. Albumin; B i.e. Globuin; C i.e. Prealbumin Thyroid hormones in blood is transpoed combined with plasma proteins. Normally 99.9% of T4 (&T3) in plasma is protein bound. Plasma protein which bind T4 & T3 are: i) AlbuminQ ii) Thyroxine binding prealbuminQ (TBPA) (new called transthyretin) iii) Thyroxine binding globulinQ (TBG): affinity to bind T4 is maximum. Protein Plasma Concentration (mg/ dl) Amount of Circulating Hormone bound ( %) T4 T3 TBGQ 2 67Q 46 TransthyretinQ (TBPA) 15 20 1 AlbuminQ 3500 13 53 - TransferrinQ : transpo iron to plasmaQ. - CeruloplasminQ transpo Cu to plasma.', 'role': 'assistant'}]