This document contains everything that you need for the IEB human endocrine system. Glands/ organs covered in these notes include the hypothalamus, the pituitary gland, the thyroid, pancreas and adrenal glands. Functions of the various hormones are covered as well as any illnesses/diseases that can...
Responds to external changes
Communicates throughout body via chemicles (hormones) >> secreted by
glands or tissue
Hormone
Organic chemical substance (protein/steroid) secreted by endocrine gland and
travels via blood to organ which regulates metabolic activities.
Don’t last long (broken down by enzymes)
Types
1. Peptide (amino-acid)
2. Steroid
Endocrine gland
Vascular, ductless gland
Target organ
Hormone only affects that cell/tissue
Exo and endocrine glands
Exo – carried in ducts where it is needed
Endo – carried in blood stream
1. Hypothalamus
In brain (glandular and nervous tissue)
Secretes oxytocin
Hormones ADH (anti-diuretic hormone) >>detects increased of low water
levels (asmolarity). – helps reserve water (when dehydrated) by blood
reabsorbing water in collecting ducts in water from kidney (less water is lost
in urine)
2. Pituitary gland (master gland)
Sends stimulating hormones to glands
, Growth disorders: when too little or too much GH is released.
1. Hypersecretion – too much
2. Hyposecretion – too little
3. Thyroid gland
Secretes thyroxin (iodin is needed)
Function
Increases basal metabolism (amount of energy body needs at rest)
production of body heat in all body cells by controlling rate of cellular
respiration
Promotes normal function of heart
Promotes normal function of nervous system by increasing nervous activity
+ sharpening alertness +reflexes
Disorders
Hypo = too low (can be treated by iodine supplements/synthetics) but once
physical/mental abnormalities >> cant fix
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller Zahn. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $2.79. You're not tied to anything after your purchase.
