Endocrine System Flashcards
Target Organ
Any cell with 1 or more receptors for a particular hormone
Hormone
Regulating substance secreted by an endocrine gland
Steroid hormones are synthesized from
Cholesterol
Nervous system
Fast response
Short lived
Electrical messengers
Skeletal muscles primarily effected
Endocrine System
Slow response
Effects last longer
Chemical messengers
Affects everything via glands
Nervous system and endocrine system similarities
Both regulatory systems to keep homeostasis.
Endocrine
Ductless
Direct to blood stream
Hormones
Exocrine
Outside body
Ducts to membrane/epithelial surface
No hormonal
Mixed gland
Pancreas
Endocrine - insulin to blood stream
Exocrine - digestive enzymes
Pituitary gland aka
Hypophysis Cerebi
Anterior Pituatary
Adrenohyphosis - secretes most hormones
TSH ACTH FSH LH KSH PL GH
Posterior Pituitary
Neurohypohysis - - holding tank, secretes AD and oxytocin
Tropic Hormone
Causes another endocrine gland to secrete its hormone
Breast feeding Hormones
Prolactin - milk production
Oxytocin - milk let down
Diabetes Insipidus
Deficiency ADH
Excessive thirst and excessive urination
Parathormone Calcitonine
Antagonists that control blood calcium levels
Ca2+ increase 20% _______ is released to keep calcium from coming from bones.
Calcitonine
Acromegaly
Hyper secretion GH after growth phase
Large hands, feet, protruding jaw
Cretinism
Hypo secretion thyroid hormones in childhood
Mental dysfunction small
Gigantism
Hyper secretion GH during growing face
Dwarfism
Hypo secretion GH during growth phase
Graves’ disease
Aka hyperthyroidism skinny, bulging eyes, nervous
Cushings
Hyper secretion cortisol and glucocortosids
Diabetes Insipidus
Hypo secretion ADH
Diabetes Mellitus
Hypo secretion Insulin
Addison’s Disease
Hypo secretion mineralcorocoids and glucocorticoids
Cells secrete insulin
Beta cells
2 parts of adrenal gland
Adrenal cortex, adrenal medulla
Mineralcorticoids
Regulate electrolytes (minerals) in body fluids
Melatonin
Stored in pineal gland, regulates sleep
Hormone secreted by placenta
HCGT
Anabolic Steroids
Mean Atrophy of testes, Ed, infertility Liver damage Heart disease Brain
Positive Feed back mechanism
Oxytocin–> labor contractions –> release more oxytocin –> stronger contractions –> birth
How does releasing hormone reach its destination
Hypophyseal portal system (connection between Pituitary and hypothalamus)
Decrease in serum calcium levels
Calcitonin
Increase in serum calcium levels
Parathormone
Increase in blood glucose
Insulin
Dehydration
ADH
Moon Face
Cushings
Child normal intelligence small
Dwarfism
Child abnormal intelligence small
Grave
Protruding eyes
Graves
Lump in throat
Goiter
Hormones of adrenal medulla act like
NT, sympathetic nervous system, fight or flight
Sodium potassium in blood regulated by
Mineralcortocoids