False about thyroid stimulating hormone (TSH) is:
TSH secretion depends upon the levels of T3,T4 as it is affected by FEEDBACK REGULATION Ref: guyton and hall textbook of medical physiology 12 edition page number: 555,556,557
secretion is pulsatile In nature
normal plasma level is 0.2-0.5 micro IU/ml
secretion is entirely under control of hypothalamus
increases synthesis and release of thyroid hormones
Endocrinology