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The oversight committees, particularly the HPSCI, became increasingly alarmed over the role US intelligence agencies were playing in the implementation of the administration's Central American policy. The issue of greatest concern was the CIA's support to the Contra rebels in Nicaragua.
The hypothalamicâpituitaryâthyroid axis (HPT axis for short, aka thyroid homeostasis or thyrotropic feedback control) is part of the neuroendocrine system responsible for the regulation of metabolism.As its name suggests, it depends upon the hypothalamus, the pituitary gland, and the thyroid gland.hyroid hormone exerts negative feedback control over the hypothalamus as well as anterior pituitary, thus controlling the release of both TRH from hypothalamus and TSH from anterior pituitary gland.