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Hormonal Influences on Metabolism

Hormonal Influences on Metabolism. Heather Bowers MS I. Energy. Definition – ability or capacity for work What do we use energy for? Where does our energy come from ? Homeostasis . Where Does All Our Energy Go?. Physical activity Digestion. Where Does All Our Energy Go?.

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Hormonal Influences on Metabolism

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  1. Hormonal Influences on Metabolism Heather Bowers MS I

  2. Energy • Definition – ability or capacity for work • What do we use energy for? • Where does our energy come from? • Homeostasis

  3. Where Does All Our Energy Go? • Physical activity • Digestion

  4. Where Does All Our Energy Go? • Basic Metabolic Rate • Amount of energy needed for basic functioning of major organs in a resting state • Dependent on gender, _____, height, & __________ • http://www.bmi-calculator.net/bmr-calculator

  5. Where Does All Our Energy Go?

  6. Basal Processes

  7. Where Does Our Energy Come From?

  8. Where Does Our Energy Come From?

  9. Energy Homeostasis • Metabolism • Catabolism – chemical reactions occurring within cells that break _________molecules into _____________ molecules & release energy • Anabolism – chemical reactions occurring within cells that build __________ molecules from ___________ molecules; this process uses or stores energy

  10. Energy Production • Calories are a measure of energy • Amount of energy required ________________________ • Macromolecules are a source of energy • Krebs Cycle produces ATP • ATP = energy

  11. Hormonal Influences on Metabolism

  12. Insulin & Glucagon Insulin Blood Sugar Blood Sugar Glucagon

  13. Epinephrine • _____________ glands • Regulated by nervous system • “Fight or flight” response • O2 & glucose to brain? • O2 & glucose to muscles? • Heart rate? • Digestion? • Pupils? • Immune response?

  14. Cortisol • Adrenal glands • Normal function: • Contributes to “fight or flight” • Restores normal state • Especially __________ function • “________ hormone” • _______ blood pressure • Decreased immunity • Increased __________________ • Muscle & bone loss • Suppressed thyroid function

  15. Thyroxine • From _________ gland • T3 & T4, calcitonin • Generally increases ________ __________________ • Respiration rate? • Temperature? • Appearance? • Increases ___________ & ________ of contraction

  16. Thyroxine Control • Hypothalamus Thyroid Gland Pituitary Gland

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