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25 Cards in this Set
- Front
- Back
Name five functions of the Endocrine System.
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- Response to stress and injury
- Growth and Development - Resproduction - Homeostasis at Ion level -Energy Metabolism |
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Hormones are:
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-Chem subs synthesized and secreted by specific tissues/organs.
- Secreted in very low concentrations - Exert marked metabolic and biochemical effects on target cells. - Are inactivated im the liver and secreted through the kidneys |
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Describe Negative Feedback:
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- High levels of a substance INHIBIT hormone secretion and synthesis
- Low levels of a substance STIMULATE synthesis secretion |
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Name the two causes problems with the Endocrine system:
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Target organ problen(End Organ)
Control organ problem (Production of hormone) |
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Describe simple negative feedback:
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Decreased Ca+ and increased Pth= Increased Ca+ and decreased Pth
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Describe complex negative feedback:
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TRH
TSH |
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Another name for circadian rhytms:
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Diurnal rhythm
It is fluctuation of hormones over 24 hour period related to sleep-wake or dark light cycles |
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Name two types of hormonal dysfunctions:
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1- Hypofunction
2- Hyperfunction |
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Describe Hypofunction
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Hypofunction either of Target organ (decrease of hormone released from the pituitary = decrease in target organ release of hormone)
or control mechanism (target organ decrease in hormone secretion = pituitary releasing MORE hormone to make up for it. |
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Decribe Hyperfunction
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Either of Control Mechanism (Increase in stimulating hormone from pituitary= increases target organ hormone release
Or Target organ (Increase in target organ hormone released = Pituiatry gland releases LESS stimulationg hormone. |
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Name some changes to watch for during assessment:
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Nutrition- elimination- sleep-sexual activity- Anxiety-
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Diagnostic Tests for Endocrine dysfunction:
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Stimuation Test
Supression Test Radioimmunoassay Urine/Blood Radiographic |
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Name a substance that when secreted by endocrine system are hormones but when secreted Hypoby neurons are neurotransmitters
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Epinephrine (Catecholamines)
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Hypothalamus
What is the Target Organ? Name the Hormones released? |
Target Organ= Hypothalmic Hypophysial Portal System
Hormones Released: GRH, CRH, GnRH, TRH, PRH Inhibited: Somastatin, PIH |
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Pituitary Gland
What are the two distinct sections called: |
'Master Gland'
Two sections: Anterior (Adenohypophysis) Posterior (Neurohypophysis) |
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Pituitary Hormones of Adenohypophysis are:
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Remember:
Get a Life: TSH & ACTH Get a Tan: MSH Grow Up: GH To have Sex: FSH, LH, PRL |
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TSH Target organ:
Its Function: |
Thyroid Gland
Stimulates Growth Hormone and Protein Synthesis |
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ACTH Target organ:
Its Function: |
Adrenal Cortex
Growth of Adrenal cortex, Secretion of corticosteroids CORTICOTROPIC HORMONE |
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GH Target Organ:
Its Function: |
Bone and soft tissue
Promotes body growth, Enhances Protein synthesis |
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MSH Target Organ:
Its Function: |
Melanocytes
Skin Pigmentation |
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LH & FHS Target Organs:
Their Functions: |
Ovaries & Testes
Sex Cell Production, Sex hormome secretion, Reproductive organ growth |
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PRL Target Organ:
Its Function: |
Mammary Glands
Stimulate Milk Production, Breast development |
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Pituitary Hormones of
Neurohypophysis are: |
ADH
Oxytocin |
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ADH Target organ:
Its Function: |
Renal Tubules
**MOST Important for Maintainance of OSMOLALITY** Fluid Volume Control (by renal tubule stimulation) |
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Oxytocin Target Organ:
Its Function: |
Mammary Glands
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