Endocrine Labs & Dx pt.1 (Exam 3) Flashcards
Review the Endocrine at the beginning of lewis
What is the master gland of the endocrine system?
The Pituitary Gland
How is the Pituitary Gland divided?
Anterior and Posterior
Which glad is responsible for diabetes mellitus
The pancreas
The posterior pituitary secretes what hormones?
Oxytocin
ADH (antidirutic hormone)
The anterior pituitary secretes what hormones?
TSH (Thyroid)
ACTH (Adrenal Cortex)
What kind of system does the endcroine system work on?
Negative Feedback
HPA Axis Example of Negative Feedback
Stress
(Triggers)
Hypothalamus to release CRF
(CRF triggers)
Pituitary to release ACTH
(ACTH triggers)
Adrenals to release Cortisol
-When cortisol is released which increase blood sugar (flight or fight)
Antidiuretic Hormone
ADH
Regulator of PURE water supply (not loosing or gain potassium or any other thing with ADH increase or decrease)
T/F: A patient with Diabetes does not have enough ADH so he is losing alot of water. Will this patient be hypokalemic?
No
Becauses ADH only controls PURE water
How does ADH work?
Increase in serum plasma osmolality (concentrated blood)
leads to
ADH release from posterior pituitary
leads to
Reabsorption of H2O in kidney tubules
leads to
Increase plasma volume and decrease plasma osmolarity
Normal Osmolality inhibits the release of ADH
Thyroid is regulated by?
TSH (Thyroid Stimulating hormone)
(Anterior Pituitary)
The Thyroid gland secretes what hormones?
Thyroxine (T4) - most abundant
Triiodothyronine (T3) - most potent
Calcitonin - together w/ PTH regulates calcium balance
Parathyroid secrets what?
Parathyroid Hormone (PTH) which regulates calcium and phosphorous
A person with thyroidectomy might become?
Hypocalcemic
C/T sign
Adrenal Gland Consist of
Two different glands
Outer = Cortex
Inner = Medulla
The pancreas has islet of langerhans which are responsible for what?
Secreting insulin
