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Endocrine Hormones
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- Chemicals produced in glands and secreted directly into the blood are
referred to as endocrine hormones which the circulatory system carries
to the various organs of the body.
- They are chemical controls involved in the regulation of growth, development, and homeostasis. |
Growth Hormone
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AKA - GH or Somatotropin (STH)
Produced - By the pituitary gland Function - Stimulates growth of the body Key Points - Non-target hormone |
Insulin
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Produced - By the Islets of Langerhans in the pancreas
Function - Responsible for the regulation of blood sugar; Insulin is secreted when blood sugar levels are high Key Points - Non-target hormone |
Epinephrine
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AKA - Adrenaline
Produced - In the adrenal medulla in times of stress Function - Accelerates heart rate and body reactions during times of stress (fight or flight response) Key Points - Non-target hormone |
Hormones
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- Comes from Greek "hormon" meaning "to excite or set into motion"
- Hormones serve as regulators, speeding up or slowing down certain bodily processes - Only a small amount is needed to change cell metabolism - Chemical regulators produced by cells in one part of the body that affect cells in another part of the body |
Steroid Hormones
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- Group of Hormones, made from cholesterol, act on genes
- Male and female sex hormones and cortisol. - Enter cytoplasm or nucleus and binds to a receptor which activates (or deactivates) the production of a protein. This protein in turn produces the desired effects. |
Protein Hormones
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- Includes insulin and GH
- Unlike steroid hormones that diffuse into cells protein hormones combine with receptors on the cell membrane - Specific hormones combine at specific receptor sites |
Thyroxine
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- A hormone that regulates metabolism
- Produced by the thyroid gland - Increases the rate of body metabolism and regulates growth |
Thyroid Stimulating Hormone
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AKA - TSH
Attaches - To the receptor sites in the thyroid gland - Stimulates release of thyroxine |
Anti Diuretic Hormone
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AKA - ADH
Function - Helps regulate body water Produced - By the hypothalamus Stored and released - In/from the posterior lobe of the pituitary Target - Kidney |
Oxytocin
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Function - Initiates strong contractions, and triggers milk release in lactating females
Produced - By the hypothalamus Stored and released - In/from the posterior lobe of the pituitary Target - Uterus, and Mammary Glands |
Glucagon
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- Hormone produced by the pancreas
- When blood sugar levels are low, glucagon promotes conversion of glycogen to glucose |
Cortisol
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- One of the most important "glucocorticoids"
- Produced by the adrenal cortex - Long-term stress hormone - Increases the level of amino acids in the blood in an attempt to help the body recover from stress - The liver converts the amino acids into glucose raising the blood sugar levels - Higher glucose levels provides the body a greater energy source - Also converts a.a into proteins for repair |
Norepinephrine
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AKA: Noradrenaline
Produced: By the adrenal medulla - Released into the blood from the adrenal medulla in times of stress - Increases heart rate and blood sugar levels to initiate fight-or-flight response - Blood vessels dilate, allowing more oxygen and nutrients to reach the tissues. - The retina of the eye also dilates (body attempts to get as much visual information as possible in stress situations) |
Adrenocorticotropic Hormone
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AKA: ACTH or corticotropin
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