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37.1: Types of Hormones - Hormone Functions
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The endocrine system plays a role in growth, metabolism, and other processes by releasing hormones into the blood.
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37.2: Types of Hormones - Lipid-Derived, Amino Acid-Derived, and Peptide Hormones
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All hormones in the human body can be divided into lipid-derived, amino acid-derived, and peptide hormones.
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37.3: How Hormones Work - Introduction
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Hormones are chemical messengers that relay messages to cells that display specific receptors for each hormone and respond to the signal.
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37.4: How Hormones Work - Intracellular Hormone Receptors
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Lipid-soluble hormones diffuse across the plasma membrane of cells, binding to receptors inside the cells where they alter gene expression.
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37.5: How Hormones Work - Plasma Membrane Hormone Receptors
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Hormones that cannot diffuse through the plasma membrane instead bind to receptors on the cell surface, triggering intracellular events.
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37.6: Regulation of Body Processes - Hormonal Regulation of the Excretory System
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The contrasting actions of antidiruetic hormone and aldosterone work to regulate the level of water in the body.
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37.7: Regulation of Body Processes - Hormonal Regulation of the Reproductive System
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Male and female gonads are regulated by FSH and LH from the pituitary; their production is stimulated by GnRH, secreted by the hypothalamus.
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37.8: Regulation of Body Processes - Hormonal Regulation of Metabolism
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The levels of glucose in the blood are regulated by the hormones insulin and glucagon from the pancreas, and T3 and T4 from the thyroid.
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37.9: Regulation of Body Processes - Hormonal Control of Blood Calcium Levels
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Blood levels of calcium are regulated by the parathyroid hormone, which acts on the bones, kidneys, and intestines to keep levels constant.
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37.10: Regulation of Body Processes - Hormonal Regulation of Growth
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Body growth is controlled by growth hormone (GH), produced by the anterior pituitary, and IGF-1, whose production is stimulated by GH.
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37.11: Regulation of Body Processes - Hormonal Regulation of Stress
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The adrenal glands respond to either short-term or long-term stressors by releasing different hormones that act differently on the body.