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When the level of growth hormone is low, which releases growth hormone releasing factor and stimulates the pituitary gland to release growth hormone?
Pancreas
Hypothalamus
Thyroid gland
Adrenal gland
Hypothalamus
The hypothalamus is the primary control center for the endocrine system and regulates the release of growth hormone from the pituitary gland. It secretes Growth Hormone-Releasing Hormone (GHRH) when levels of growth hormone (GH) are low, which then signals the anterior pituitary to synthesize and secrete more growth hormone.
The hypothalamus is the primary control center for the endocrine system and regulates the release of growth hormone from the pituitary gland. It secretes Growth Hormone-Releasing Hormone (GHRH) when levels of growth hormone (GH) are low, which then signals the anterior pituitary to synthesize and secrete more growth hormone.
Think of the hypothalamus as the 'thermostat' of your body's hormone system. Just as a thermostat senses when a room is too cold and kicks the heater on, the hypothalamus senses low GH levels and turns on the pituitary 'heater' to bring the hormone levels back up.
GHRHтЖТStimulates┬аGH┬аrelease
GHтЖТInhibits┬аGHRH┬аproduction┬а(Negative┬аFeedback)
This process is regulated by a negative feedback loop. When circulating levels of growth hormone are low, the hypothalamus detects this state and releases GHRH into the hypophyseal portal system. This stimulating hormone reaches the anterior pituitary, triggering somatotroph cells to release growth hormone into the bloodstream. Once GH levels rise, the hypothalamus decreases GHRH production and may release somatostatin (GHIH) to inhibit further release.
The hypothalamus acts as the link between the nervous system and the endocrine system.
The anterior pituitary (adenohypophysis) produces growth hormone under hormonal control.
Negative feedback ensures that hormone levels remain within the homeostatic range.
Regulation of somatic growth in childhood.
Maintenance of metabolic homeostasis.
The hypothalamus is located below the thalamus and above the brainstem.
Option A (Pancreas) regulates blood sugar; Option C (Thyroid gland) regulates metabolic rate; Option D (Adrenal gland) manages stress response.
B is correct тАФ The hypothalamus is the part of the brain that releases Growth Hormone Releasing Hormone (GHRH) to stimulate the pituitary gland.
Always remember the hypothalamus is the 'master switch' for pituitary hormones; most pituitary stimulation flows from a releasing hormone produced in the hypothalamus.
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