<prompt> Which of the following would be least affected by injections of TSH?Uptake of Iodine by ThyroidSynthesis of thyroglobulincGMP in Thyroid cellsProduction of TSH  <response>: Thyroid-stimulating hormone also known as thyrotropin, thyrotropic hormone, TSH, or hTSH for human TSH is a pituitary hormone that stimulates the thyroid gland to produce thyroxine T4, and then triiodothyronine T3 which stimulates the metabolism of almost every tissue in the body. It is a glycoprotein hormone synthesized and secreted by thyrotrope cells in the anterior pituitary gland, which regulates the endocrine function of the thyroid.Ref: Ganong;s review of medical physiology; 24th edition; page no-341 