RSL - Endocrine Flashcards
Thyroglossal duct cyst: (diff from cervical sinus)
midline, moves with swallowing
GLUT 1:
Insulin independent: RBCs, Brain, Cornea
GLUT 2:
Insulin independent: beta islet cells, liver, kidney, small intestine
GLUT 3:
Insulin independent: brain
GLUT 4:
Insulin de-pendent: Striated muscle, adipose tissue
GLUT 5:
Insulin independent: Spermatocytes, GI tract
Ghrelin
Stimulates hunger, GH release. Produced by stomach. Increased in Prader-willi
Leptin
Satiety hormone: produced by fat cells
GLucocorticoid indusced myopathy
Proximal muscle weakness, atrophy without pain, Normal CK
Hypocalcemia
Cramps, pain, parasthesia, carpopedal spasm
PTH: how increase Ca+ kidney
DCT
PTH: how decrease PO4- kidney
PCT
PTH: how increase Vit D kidney
Stimulates 1-alpha hydroxylase in PCT
PTH: how increase Ca++ from bone
Signals increase MCSF and RANK-L –> osteoclasts reabsorbing Ca++
Factors that increase TBG
OCP (estrogen), Pregnancy
Factors that decrease TBG
Liver failure, Steroids
Thyroid peroxidase action (3)
Oxidation of I-, organification of iodide, Coupling MIT and DIT
Metyrapone
Blocks last step in cortisol synthesis: 11-deoxycorisol –> cortisol
Adrenal insufficiency: when is aldosterone function retained
Secondary/tertiary