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Thyroid

Thyroidism notes Campbell biology 9th edition

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Endocrine system
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? 2012 Pearson Education, Inc. The Thyroid Gland ? Lies anterior to thyroid cartilage of larynx ? Consists of two lobes connected by narrow isthmus ? Thyroid follicles ? Hollow spheres lined by cuboidal epithelium ? Cells surround follicle cavity that contains viscous colloid ? Surrounded by network of capillaries that ? deliver nutrients and regulatory hormones ? accept secretory products and metabolic wastes Figure 18-10 ? 2012 Pearson Education, Inc. The Thyroid Gland: Thyroid hormones ? Thyroglobulin (Globular Protein) ? Synthesized by follicle cells ? Secreted into colloid of thyroid follicles ? Molecules contain the amino acid tyrosine ? Thyroxine (T4) ? ?pro-hormone? ? Also called tetraiodothyronine

Module 4 part 4

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Doreen Pang Mrs. Trainor AP Psychology 11 October 2016 Module 4-4 The Endocrine System Our body has two communications system: Endocrine and Neural Endocrine System Travels through blood interconnected with the nervous system secrete glands chemical messages Hormones Chemical messengers that circulate in the blood Hormones Originates in one tissue travels through blood stream affects other tissues: like the brain influences: sex food aggression Some Hormones are chemically the same as neurotransmitters those chem. messengers: diffuse across synapse excite/inhibit an adjacent neuron Endocrine/nervous systems are kindred The 2 differences are: Slower Effects lasts longer both secrete molecules that activate receptors elsewhere Endocrine is slower than nervous system
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