Endocrine System - BY 101 Endocrine System Department...

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1 Department of Biology BY 101 Endocrine System
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2 Topic Objectives 1. What is the primary function of the endocrine system? 2. What are the organs of the endocrine system, and what chemicals do they produce? 3. What is the relationship between the chemicals produced and the types of cells that they target? 4. What types of stimuli are responsible for the synthesis of hormones? 5. What is the structure of the pituitary gland? 6. What are the major hormones produced in the pituitary gland, and what are their primary functions? 7. Where is the thyroid gland located? What are the primary functions of the hormones it produces? 8. Where are the parathyroids located and what hormones do they produce?
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3 Topic Objectives 1. Where are the adrenal glands located? What are the hormones produced, and what is their function? How is stress related to hormone production of the adrenals? 2. What are the two types of tissue that are found in the pancreas? What is produced by both types of tissue? How are the endocrine tissues and their hormones related to the metabolism of an individual? 3. What is the primary roles that the gonads play in the functioning of an individual? What is the relationship between the gonads and hormone production? How does the hormone production differ between males and females? 4. What are the health risks of using anabolic steroids to increase muscle mass in both males and females?
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4 Endocrine System The body’s controlling system that influences metabolic activities by means of hormones produced in glands or glandular tissue
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5 Hormones Chemical substances produced by glands that: - Regulate the metabolic function of other cells - Have lag times ranging from seconds to hours - Tend to have prolonged effects
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6 Types of Hormones Amino acid based (proteins) – most hormones belong to this class Steroids – gonadal and adrenocortical hormones Eicosanoids – leukotrienes and prostaglandins (not covered in this course)
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7 Target Cell Specificity Hormones circulate to all tissues, but only activate cells called target cells Target cells must have specific receptors to which the hormone binds Receptors may be located on the plasma membrane or in the cell
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8 Mechanism of Protein Hormones
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9 Mechanism of Steroid Hormones
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10 Mechanism of Steroid Hormones
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11 Control of Hormone Release Hormones are synthesized, stored, and released in response to: Humoral stimuli - changing blood levels Neural stimuli - stimulation by nerve fibers Hormonal stimuli - hormone secretion by other glands
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12 Hormone Production Stimuli Humoral Stimuli Neural Stimuli Hormonal Stimuli
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Quick Review 13 What is the primary function of the endocrine system? What are the organs of the endocrine system, and what chemicals do they produce?
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