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Endocrine System-C 19

by: Gloria Notetaker

Endocrine System-C 19 BIOL-N261

Gloria Notetaker
GPA 3.8
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About this Document

This is over what my class went over, but if you are in a different class going over the endocrine system, feel free to look it over because Im sure it will still have some useful information for y...
Human Anatomy
Dr. Yard
Class Notes
Endocrine, Hormones, pituitary, anatomy, Biology




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This 3 page Class Notes was uploaded by Gloria Notetaker on Thursday April 14, 2016. The Class Notes belongs to BIOL-N261 at Indiana University Purdue University - Indianapolis taught by Dr. Yard in Winter 2016. Since its upload, it has received 42 views. For similar materials see Human Anatomy in Science at Indiana University Purdue University - Indianapolis.

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Date Created: 04/14/16
4-14 Chapter 19: The Endocrine System Intro/Overview  Slide 5 of figure 19.1 is the most important slide of the chapter!!  Endocrine system works a lot slower than nervous system, for long term processes.  Hormones will bathe all cells in body. Not all cells react, just depends on the receptors on the cell  Some things can function as neurotransmitters and some as hormones  All fats are lipids, not all lips are fats  Endocrine cells=glandular secretory cells that release hormones  According to chemical structure, hormones are organized into 4 groups. Amino acid derivatives, peptide hormones, steroid hormones, eicosanoids  Amino acids are proteins  When think of hormonal stimuli(something that triggers endocrine reflex), think of hypothalamus and conscious/unconscious.  Kidney, heart, fatty tissue, digestive tract all have endocrine functions! (Other organs do too but these are important to note because people don’t usually associate them with endocrine) o If asked a question on what organs are involved in endocrine system and you don’t know, your best option is to choose all of the above because most organs do have endocrine Pituitary Gland  Neurohypophysis (posterior lobe) stores ADH and oxytocin. Only STORES, this lobe doesn’t produce anything!  Oxytocin is the cuddling hormone. Really high levels at sexual arousal. Also high at social bonding and when you smell something that reminds you of someone who took care of you. Also, makes you trust.  Adenohypophysis (anterior lobe) is involved with ACTH, TSH, GH, PRL, FSH, LH o Known as master gland  Intermediate lobe secretes melanin in pregnant woman, fetuses, and babies Thyroid Gland  High blood supply  Need iodine salt so you don’t get a goiter.  Helps out with calcium homeostasis  Controls metabolism Parathyroid Gland  Can live without thyroid, but not without parathyroid  PTH (parathyroid hormone) regulates calcium homeostasis  Parathyroid issues=muscle spasms Thymus  Top of heart  Shrinks as you get older o Babies=size of adult palm o Young adults: size of thumb o Continues to get even smaller  T cells(important part of thymus) are a type of lymphocyte Suprarenal Glands  Manages stress levels!  Cortex has 3 parts o Zona glomerulosa. Produces mineralcorticoids o Zona Fasciculata. Produces glucocorticoids o Zona Reticularis. Produces androgens  Medulla: Middle. Produces epinephrine and norepinephrine Endocrine Functions of the Kidney and Heart  Calcitriol is a steroid hormone involved with the kidney. Don’t confuse with calcitonin!  Heart has Atrial natriuretic peptide(ANP) and brain natriuretic peptide(BNP) and they both help with blood pressure and blood volume The Pancreas  Alpha cells produce glucagon and beta cells produce insulin o Students get these 2 mixed up a lot so make sure you know! Endocrine Tissues of the Reproductive System  Know testes and ovaries are part of the endocrine system.  Follicular cells in ovaries produce estrogen and secrete inhibin. Pineal Gland  Part of epithalamus. Above corpura quadregimina  Pineal Gland is known for MELATONIN, which slows maturation of sperm, oocytes, and reproductive organs. Also involved with sleep Hormones and Aging  Levels of certain hormones change at different ages  Reproductive hormones rise at puperty


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