Biology 2601A/B Lecture Notes - Lecture 19: Thyroid, Adrenal Gland, Blood Vessel

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Steroid hormones: derived from cholesterol (top figure) Few act at membranes: non-genomic effect: the gland that produces steroid hormones uses - "on-de(cid:373)a(cid:374)d(cid:863) s(cid:455)(cid:374)thesis, made as they are needed, this differs from the way a lot of chemicals communicate in the body. It produce camp using atp: camp is a second messenger that changes the activity of other enzymes such as protein kinase a, which can phosphorylate a protein to activate it or deactivate it. Some are not water soluble (nuclear receptors: e. g. thyroid hormones - big ring structures reduce their water solubility, they can diffuse somewhat across the plasma membrane. Table: do(cid:374)"t (cid:374)eed to (cid:373)e(cid:373)orize, good summary of their properties. Vasopressin & kidney function: arginine vasopressin is released from posterior pituitary during water stress (even though its made in the hypothalamus) Anterior pituitary hormones: green: tropic, thyrotropin, affects thyroid stimulating hormone, adrenocorticotropic. Insulin and glucagon are both secreted by the pancreas.

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