Exam 6 Flashcards
Structures of the Endocrine System
Pineal gland Hypothalamus Pituitary gland Thyroid and parathyroid glands Thymus Adrenal glands Pancreas Ovaries/Testes
Pineal Gland
Hormones: Melatonin
Functions: Regulates our sleep cycles
Hypothalamus Hormones
Corticotropin releasing hormone Thyrotropin releasing hormone Growth hormone releasing hormone Gonadotropin releasing hormone Prolactin releasing factor Somatostatin Prolactin inhibiting factor
Functions of the Hypothalamus
Releases hormones that stimulate the release of other hormones from the pituitary
Anterior Pituitary Hormones
Growth hormone (dwarfism, gigantism) Thyroid stimulating hormone Adrenocorticotropic hormone Follicle stimulating hormone Lutenizing hormone Melanocyte stimulating hormone Prolactin
Posterior Pituitary Hormones
Antidiuretic hormone (increase is SIADH, decrease is diabetes insipidus) Oxytocin
Thyroid Gland
Hormones: T3 and T4, calcitonin
Functions: regulate metabolism, decreases serum calcium and phosphorus levels
Iodine is necessary for proper thyroid function
Parathyroid Gland
Hormones: parathyroid hormone
Functions: increases serum calcium and phosphorus
Thymus Gland
Hormones: thymosin
Functions: helps to train our immune system so it can recognize self from non-self
Can contribute to myasthenia gravis
Adrenal Medulla Hormones
Epinephrine
Norepinephrine
Pheochromocytoma is a tumor in the adrenal gland that stimulates excessive release of norepinephrine and epinephrine
Adrenal Cortex Hormones
Corticosteroids (cortisol), androgens, mineralcorticoids (aldosterone)
Cushing’s: too much cortisol
Addison’s/Adrenal Insufficiency: too little cortisol
Pancreas
Hormone: insulin
Functions: helps with uptake of sugar into the cells
Ovary
Hormones: estrogen and progesterone
Functions: aid in the development of women’s secondary sex characteristics, help prepare uterus for implantation of the egg, aid in fetal development
Polycystic ovarian syndrome
Testes
Hormones: testosterone
Functions: help to develop secondary sex characteristics in men
Disease Processes: erectile dysfunction, infertility
Diagnostic Tests for Endocrine Disorders
Labs: blood levels of hormones
Radiologic: x-rays, radiologic studies, CAT scans, MRIs
Urine: helps to assess cortisol levels
Clinical Manifestations of Hyperthyroidism
Weight loss, excess hunger, bounding pulse, goiter, brittle nails, sweating, elevated heart rate, excess fatigue, exophthalmos, hypertension, hair loss, menstrual irregularities, diarrhea
Diagnostic Tests for Hyperthyroidism
TSH levels
Free T3 and T4 levels
Radioactive iodine uptake study
Treatments for Hyperthyroidism
Radioactive iodine (will not know results for 2-3 months)
Medications (PTU, methimazole, potassium iodine, propanolol)
Surgery
Dietary Instructions for Hyperthyroidism
No caffeine Increase caloric intake to up to 4,000-5,000 calories/day 6 small meals per day Do not limit carbs/protein Watch fiber and spice intake
Equipment Needed for Post-Op Thyroidectomy
Oxygen
Suction
Tracheostomy kit
Calcium gluconate