Endocrine system Flashcards
“endo”
within
“krino”
secrete
Composed of endocrine glands and specialized endocrine cells located throughout the body.
Endocrine System
Endocrine glands secrete chemical messengers called ______ into the bloodstream in order to produce a specific response to target tissues or effectors.
Hormones
The main regulatory functions of the endocrine system are the following:
- Metabolism
- Control of food intake and digestion
- Tissue Development
- Ion Regulation
- Water Balance
- Heart rate and blood pressure regulation
- Control of blood glucose and other nutrients
- Control of reproductive functions
- Uterine contractions and milk release
- Immune system regulation
“hormon”
to set in motion.
two chemical categories:
- Lipid- soluble
- Water-soluble
- Non-polar
- Small size and low solubility in aqueous fluids.
Lipid-soluble hormones
Needs a binding protein for transport
Lipid-soluble hormones
Diffuses across the cell membrane
Lipid-soluble hormones
Lipid-soluble hormones Receptor Location:
Nucleus or cytoplasm
Ex: Steroid and thyroid hormones
Lipid-soluble hormones
• Polar
• Vary from small to large and soluble in blood
Water-soluble hormones
______ dissolve directly into the blood and are delivered to the target tissue without attaching to binding protein.
Large hormones
________ however need attachment to larger protein to avoid being filtered out of the blood.
Small Hormones
Cannot diffuse through cell membrane
Water-soluble hormones
three types of stimuli which regulate hormone release:
- Humoral
- Neural
- Hormonal
