Exam 3 – Lecture 27: Endocrine System 2 Flashcards
What are the endocrine organs?
Pituitary/hypothalamus Pineal (3rd eye) Thyroids Parathyroids Adrenals Pancreas Gonads
What is the pituitary known as?
Master gland
What is the pituitary connected at?
The base of the brain
What does the pituitary sit in?
A depression at the base of the skull called sella tursica
What is the anterior pituitary composed of?
Rathke’s pouch
What feeds into the pituitary?
Hypothalamus
What are the 2 portions of the pituitary?
Anterior (adenohypophysis) and posterior (neurohypophysis)
What is the hypothalamus?
A portion of the brain that leaves from the stalk out of the brain stem and into the pituitary
What is something that occurs in the pituitary that only happens in a few places
Capillary turns into a vein and then a capillary again
What are the 3 parts to the anterior pituitary?
Pars distalis
Pars intermedia
Pars tuberalis
What makes up a majority of the anterior pituitary?
Pars distalis
What hormones come from the pars distalis?
ACTH (adrenocorticotropic hormone) TSH (thyroid stimulating hormone) FSH (follicle stimulating hormone) LH (luteinizing hormone) GH (growth hormone)
What hormone comes from the pars intermedia?
MSH (melanocyte stimulating hormone)
What hormones come from the pars tuberalis?
ACTH
FSH
LH
What is Cushing’s disease/canine hyperadrenalcorticism?
Too much activity from the cortex of the adrenal gland–too much cortisol
What can be found in pars distalis?
Acidophils
Basophils
Chromophobes
What can be found in pars intermedia?
Basophils
Chromophobes
Is the posterior pituitary endocrine?
Not technically because it is not glandular it is an extension of the CNS, but it does release its contents into the bloodstream
What can be found in the posterior pituitary?
Supraoptic and paraventricular nuclei
Pars nervosa
Infundibulum
What hormones come from the posterior pituitary?
Oxytocin
ADH
What is ADH?
Vasopressin
What does the hypothalamus do?
Regulates the pituitary function with releasing hormone
Negative feedback
What does the pineal gland respond to?
Light
What does pineal gland produce?
Melatonin