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Homeostasis and Endocrinology
Terms in this set (14)
Any of various internally secreted compounds formed in endocrine glands, which affect the functions of organs which are specifically receptive to them. Hormones are carried throughout the body in the body's fluids.
the maintenance of a constant internal state in a changing environment; a constant internal state that is maintained in a changing environment by continually making adjustments to the internal and external environment
A form of regulation in which accumulation of an end product of a process slows the process; in physiology, a primary mechanism of homeostasis, whereby a change in a variable triggers a response that counteracts the initial change.
A form of regulation in which an end product of a process speeds up that process; in physiology, a control mechanism in which a change in a variable triggers a response that reinforces or amplifies the change.
Specific tissue acted on by each hormone. Have receptors where the hormone attaches.
A neural structure lying below the thalamus; it directs several maintenance activities (eating, drinking, body temperature), helps govern the endocrine system via the pituitary gland, and is linked to emotion and reward.
Anterior pituitary gland
Contains no neurosecretory cells. Cell bodies start in hypothalamus, and terminate in the portal system. Connected to hypothalamus via the portal system. Releases thyroid-stimulating hormone, ACTH, prolactin, growth hormone, LH, and FSH.
Posterior pituitary gland
Also known as the neurohyophysis, the posterior pituitary is made of nervous tisssue and stores and secretes two hormones made by the hypothlamus; oxtytocin and ADH. The posterior pituitary is controlled by action potentials from the hypothalamus.
Thyroid releasing hormone
hormone released from the hypothalamus which stimulates the release TSH (thryoid stimulating hormone) from the thyroid gland
Thyroid stimulating hormone
(TSH) Produced by the anterior lobe of the pituitary gland & bind to receptors on cells of the thyroid gland, which in turn stimulates the synthesis of thyroxin. Regulated through a negative feed back loop.
causes thyroid gland cells to secrete T3 and T4; stimulates thyroid growth
Endocrine gland that helps regulate the rate of metabolism
Endocrine - Produces hormones, such as thyroxine (T4) and calcitonin. Thyroxine regulates and controls cellular respiration. An under-active gland could cause hypothyroidism in which the gland enlarges, lower body temperature, weight gain, and lack of energy. An over-active gland could cause nervousness, weight loss, and an increase in body temperature/blood pressure. Calcitonin lowers the blood calcium levels in children as a form of homeostasis.
stimulate energy metabolism of all cells
Treatment of Hypothyroidism.
Iodine essential for synthesis
Also called thyroid hormone, thyroxine is produced and secreted by follicle cells in the thyroid gland. it targets all cells in the body and increases overall body metabolism.
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