Monday, February 25, 2008
Lazy Days...
Another lazy Sunday has passed. Gina spent her day taking naps, visiting with grandparents, and later in the evening watching movies and getting a spa treatment from her wonderful mom! ;D). Spoiled rotten!!! Tomorrow starts another day of therapies and excitement...prepare your adrenal glands!!!!!!!
Mimi
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Mimi:
For those unfamiliar with the function of the Adrenal Glands, here is a brief description:
Anatomically, the adrenal glands are located in the thoracic abdomen situated atop the kidneys, specifically on their anterosuperior aspect. In humans, the adrenal glands are found at the level of the 12th thoracic vertebra and receive their blood supply from the adrenal arteries.
The adrenal gland is separated into two distinct structures, both of which receive regulatory input from the nervous system:
* Adrenal medulla
As its name suggests, the adrenal medulla is the central core of the adrenal gland, surrounded by the adrenal cortex. The chromaffin cells of the medulla are the body's main source of the catecholamine hormones adrenaline (epinephrine) and noradrenaline (norepinephrine). These water-soluble hormones, derived from the amino acid tyrosine, are part of the fight-or-flight response initiated by the sympathetic nervous system. The adrenal medulla can be considered specialized ganglia of the sympathetic nervous system, lacking distinct synapses, instead releasing secretions directly into the blood. It is also the main source of dopamine, a catecholamine closely related to adrenaline and noradrenaline.
* Adrenal cortex
By contrast, the adrenal cortex is devoted to the synthesis of corticosteroid hormones from cholesterol. Some cells belong to the hypothalamic-pituitary-adrenal axis and are the source of cortisol synthesis. Other cortical cells produce androgens such as testosterone, while some regulate water and electrolyte concentrations by secreting aldosterone. In contrast to the direct innervation of the medulla, the cortex is regulated by neuroendocrine hormones secreted by the pituitary gland and hypothalamus, as well as by the renin-angiotensin system.
...So there ypou have it...
Gina,
sorry i havent been able to leave a comment in a while, my internet kept breaking. But i am so proud of your progress. you are doing so amazing!! I hope we can come see you soon. I miss you so much! Also, me and meggie have birthday present for you. we made it ourselves, you will be very proud when you see it. I can't wait to see you. Love, Anna
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