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Published byDebra Hunt Modified over 9 years ago
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D. C. MIKULECKY PROFESSOR OF PHYSIOLOGY AND FACULTY MENTORING PROGRAM
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NERVOUS SYSTEM “WIRED” CHEMICAL SIGNAL AT TARGET CELL RAPID BRIEF DURATION CLOSE ANATOMICAL PROXIMITY ENDOCRINE SYSTEM “WIRELESS” CHEMICAL SIGNAL AT TARGET CELL SLOW LONG DURATION SPECIFIC RECEPTORS
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PEPTIDES AMINES STEROIDS
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HYDROPHILIC DISSOLVED IN PLASMA RECEPTOR ON CELL SURFACE cAMP OR CALCIUM AS SECOND MESSENGERS ACTIVATE SPECIFIC GENES TO INITIATE PROTEIN SYNTHESIS
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HYPOTHALAMIC PITUITARY PANREATIC PARATHYROID GI KIDNEY LIVER HEART
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THYROID HORMONE CATECHOLAMINES ALL DERIVED FROM AMINO ACID TYROSINE UNIQUE SYNTHETIC AND SECRETORY PATHWAYS
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LIPOPHILIC RECEPTOR IN CYTOPLASM ACTIVATE SPECIFIC GENES TO INITIATE PROTEIN SYNTHESIS ADRENAL CORTICAL GONADAL PLACENTAL
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DEPENDS ON RATE OF SECRETION NEGATIVE FEEDBACK NEUROENDOCRINE REFLEXES DIURNAL RHYTHMS
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HORMONE EXCESS HORMONE DEFICIENCY DECREASED RESPOSIVENESS OF RECEPTORS
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HYPOTHALAMUS NEUROSECRETORY NEURONS ANTERIOR PITUITARY POSTERIOR PITUITARY SYSTEMIC ARTERY SYSTEMIC VEIN VASOPRESSIN OXYTOCIN
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HYPOTHALAMUS NEUROSECRETORY NEURONS ANTERIOR PITUITARY: TSH ACTH PROLACTIN GROWTH HORMONE LH FSH POSTERIOR PITUITARY
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VESSELS PASS THROUGH STALK OF PITUITARY FROM HYPOTHALAMUS TO ANTERIOR PITUITARY CARRY HYPOTHALAMIC REGULATORY HORMONES
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TROPIC HORMONES CONTROL THE SECRETION OF OTHER HORMONES BY ACTING ON ENDOCRINE TISSUE
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CONTROL THE SECRETION OF ANTERIOR PITUITARY TROPIC HORMONES TRH:THYROTROPIN-RELEASING HORMONE PRH:PROLACTIN RELEASING HORMONE PIH:PROLACTIN INHIBITING HORMONE GHRH:GROWTH HORMONE RELEASING HORMONE GHIH: GROWTH HORMONE INHIBITING HORMONE CRH:CORTICOTROPHIN RELEASING HORMONE
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INPUT HORMONE 1 (RELEASING/INHIBITING) HORMONE 2 (TROPIC) HORMONE 3 TARGET CELLS SYSTEMIC CIRCULATION H/H PORTAL SYSTEM HYPOTHALAMUS ANTERIOR PITUITARY ENDOCRINE GLAND
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INPUT HORMONE 1 (RELEASING/INHIBITING) HORMONE 2 (TROPIC) HORMONE 3 TARGET CELLS SYSTEMIC CIRCULATION H/H PORTAL SYSTEM HYPOTHALAMUS ANTERIOR PITUITARY ENDOCRINE GLAND
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THYROID GLAND THYROID HORMONES (T 3 & T 4 )
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ADRENAL CORTEX CORTISOL
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MAMMARY GLANDS BREAST GROWTH AND MILK SECRETION
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LIVER SOMATOMEDINS BONE SOFT TISSUE GROWTH MANY TISSUES INTERMEDIARY METABOLISM INCREASE OR DECREASE
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LH:LETEINIZING HORMONE SEX HORMONE SECRETION F: ESTROGEN AND PROGESTERONE M: TESTOSTERONE FSH:FOLLICLE STIMULATING HORMONE GAMETE PRODUCTION OVA SPERM
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GENETIC DIET DISEASE HORMONES
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LIVER SOMATOMEDINS BONE SOFT TISSUE GROWTH MANY TISSUES INTERMEDIARY METABOLISM INCREASE OR DECREASE
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MOBILIZES TRIGLYCERIDE FAT STORED IN ADIPOSE TISSUE CONSERVES GLUCOSE FOR BRAIN
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SOFT TISSUES: STIMULATES CELL DIVISION, INCREASES SIZE OF CELLS STIMULATES ALMOST ALL ASPECTS OF PROTEIN SYNTHESIS INHIBITS PROTEIN DEGRADATION PROMOTES UPTAKE OF AMINO ACIDS
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BONE: PROMOTES GROWTH OF LONG BONES THICKNESS LENGTH AT END OF ADOLESCENCE, SEX HORMONES STOP THIS ACTION
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PEPTIDE MEDIATORS PRODUCED IN LIVER AND OTHER TISSUES ALSO PARACRINE EFFECTS
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ANTAGONIST IN CONTROL OF GROWTH HORMONE SECRETION NEGATIVE FEEDBACK DIURNAL RHYTHM: GH SECRETED AT NIGHT EXERCISE, STRESS, HYPOGLYCEMIA
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DEFICIENCY: DWARFISM, REDUCED MUSCLE STRENGTH, DECREASED BONE DENSITY EXCESS:GIGANTISM, ACROMEGLY
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OVER TRACHEA THYROGLOBULIN TETRAIODOTHYRONINE TRIIODOTHYRONINE IODINE REQUIRED FROM DIETARY INTAKE
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METABOLIC RATE: INCREASED BMR CALOROGENIC: INCREASED HEAT PRODUCTION SYMPATHOMIMETIC: FLIGHT OR FIGHT CARDIOVASCULAR:INCREASES RESPONSIVENESS OF HEART GROWTH: ESSENTIAL FOR NORMAL GROWTH NERVOUS SYSTEM:DEVELOPMENT AND ADULT ACTIVITY
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HYPOTHALAMUS TRH ANTERIOR PITUITARY TSH THYROID GLAND TARGET ORGANS THYROID HORMONE STRESS COLD IN CHILDREN - +
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HYPO REDUCED BMR POOR TOLERANCE OF COLD GAIN OF WEIGHT FATIGUE SLOW, WEAK PULSE SLOW REFLEXES AND MENTATION MYXEDEMA GOITER CRETINISM HYPER GRAVE’S DISEASE:TSI EXOPHTALMOS GOITER
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CORTEX: STEROID HORMONES SECRETED MEDULLA: CATECHOLAMINES
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MINERALOCORTICOIDS GLUCOCORTICOIDS SEX HOMONES
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ALDOSTERONE ELECTROLYTE BALANCE BLOOD PRESSURE RENIN-ANGIOTENSIN-ALDOSTERONE SYSTEM
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CORTISOL GLOCONEOGENESIS PERMISSIVE ACTIONS STRESS ADAPTATION ANTI-INFLAMITORY AND IMMUNOSUPPRESSANT
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HYPOTHALAMUS CRH ANTERIOR PITUITARY ACTH ADRENAL CORTEX TARGET ORGANS CORTISOL STRESS DIURNAL RHYTHM + + - - INCREASED BLOOD GLUCOSE BLOOD AA BLOOD FATTY ACIDS
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ANDROGENS (TESTOSTERONE) ESTROGENS LESS THAN GONADS
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MINERALCORTICOIDS: SODIUM RETENTION, POTASSIUM DEPLETION CORTISOL:EXCESS GLUCONEOGENESIS- EXCESS GLUCOSE DEPOSITED AS FAT ANDROGEN:MASCULINIZATION, PSEUDOHERMAPHODITISM, PRECOCIOUS PSEUDOPUBERTY, NO EFFECT IN ADULT MALES
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CORTEX: ADDISON’S DISEASE POOR RESPONSE TO STRESS LACK OF PERMISSIVE ACTION POTASSIUM RETENTION HYPOTENSION
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A MODIFIED SYMPATHETIC POST GANGLIONIC NEURON EPINEPHRINE
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MIMICS SYMPATHETIC NS MOBILIZES STORED FAT AND CARBOHYDRATE HEART AND BLOOD VESSELS
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FLIGHT OR FIGHT EPINEPHRINE CRH-ACTH-CORTISOL RENIN-ANGIOTENSIN-ALDOSTERONE VASOPRESSIN COORDINATED BY HYPOTHALAMUS CAN BE INDUCED PSYCHOSOCIALLY
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GLYCOGENESIS GLYCOGENOLYSIS GLUCONEOGENESIS PROTEIN SYNTHESIS PROTEIN DEGRADATION FAT SYNTHESIS FAT BREAKDOWN
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BUILD UP VS BREAKDOWN OF LARGE MOLECULES ANABOLISM REQUIRES ENERGY (ATP) CATABOLISM:ENERGY PRODUCTION
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INSULIN GLUCAGON
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BETA CELLS IN ISLETS OF LANGERHANS: INSULIN FACILITIES GLUCOSE ENTRY INTO CELLS STIMULATES GLYCOGENESIS INHIBITS GLYCOGENOLYSIS INHIBITS GLUCONEOGENESIS
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INCREASES TRANSPORT INTO ADIPOSE CELLS PROMTES TRIGLYCERIDE SYNTHESIS INHIBITS LIPOLYSIS
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PROMOTES UPTAKE OF AA BY MUSCLE AND OTHER TISSUE PROMOTES PROTEIN SYNTHESIS INHIBITS PROTEIN DEGRADATION
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NEGATIVE FEEDBACK: BLOOD SUGAR BLOOD AA GI HORMONES PARASYMPATHETIC ACTIVITY
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TYPE I: AUTOIMMUNE DESTRUCTION OF BETA CELLS, LACK OF INSULIN SECRETION TYPE II: REDUCED SENSITIVITY OF INSULIN RECEPTORS
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EXTRACELLULAR GLUCOSE EXCESS GLUCOSE IN URINE EXCESS FLUID LOSS CIRCULATORY FAILURE RENAL FAILURE NERVOUS SYSTEM MALFUNCTION DUE TO DEHYDRATION EXCESSIVE FOOD INTAKE PROGRESSIVE WEIGHT LOSS MOBILIZTION OF FAT KETOSIS ACIDOSIS COMA AND DEATH
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PANCREATIC ALPHA CELLS GENERALLY OPPOSES ACTIONS OF INSULIN DECREASE GLYCOGEN SYNTHESIS PROMOTE GLYCOGENOLYSIS STIMULATE GLUCONEOGENESIS PROMOTES FAT BREAKDOWN ONLY IN LIVER: PROTEIN CATABOLISM
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ALL INCREASE BLOOD GLUCOSE AND FATTY ACIDS CORTISOL INCREASES BLOOD AA AND DECREASES MUSCLE PROTEIN GH DECREASES BLOOD AA AND INCREASES MUSCLE PROTEIN
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PARATHYROID HORMONE CALCITONIN VITAMIN D
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RAISES FREE PLASMA CALCIUM FROM BONE CONSERVATION IN KIDNEYS INCREASES INTESTINAL ABSORPTION (VIA VITAMIN D ACTIVATION) REGULATED BY FREE CALCIUM IN PLASMA (NEGATIVE FEEDBACK)
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C CELLS OF THYROID GLAND DECREASE IN CA MOBILIZATION FROM BONE NOT AS IMPORTANT AS PTH AND VITAMIN D
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ACTUALLY A HORMONE RELEASED FROM SKIN BY SUNLIGHT TWO STEP ACTIVATION: LIVER AND KIDNEYS INCREASES CALCIUM ABSORPTION IN INTESTINE
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LOW CALCIUM AND HIGH PHOSPHATE MUSCLE SPASMS MENTAL CHANGES
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IMPARED ABSORPTION OF CALCIUM PTH MAINTAINS PLASMA LEVEL AT EXPENSE OF BONES RICKETS IN CHILDREN OSTEOMALACIA IN ADULTS
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