Zusammenfassung der Ressource
Endocrine System
- Functions in the regulation of body activities
- Examples of endocrine glands
- sweat glands
- Sweat glands help maintain your body temperature, hydrates your skin and balances your body chemicals
- salivary glands
- Your salivary glands make saliva in your mouth.
- Saliva is important to lubricate your mouth, help with swallowing, protect your teeth against bacteria, and also help digesting your food
- Digestive glands
- Digestive glands are the glands that are involved in the digestion process (including salivary glands)
- The Endocrine System uses chemical messengers called
hormones to influence growth, development, and metabolic
activities.
- The hormones spread throughout the whole body and diffuse in cells of relevant body parts
- The are two different types of soluble hormones
- If the hormone is water soluble, for example Adrenaline, it will not be able to enter the cell because the cell membrane is not water soluble.
- What this hormones do instead I connected it to a receptor protein on the surface of the cell membrane, where it sends out signals to an organelle in the cell that will then send these signals to the nucleus
- If the hormone is lipid soluble like testosterone, the hormone can move through the Phospholipid bilayer (cell membrane) and then move right to the nucleus.
- There are two major catagories of glands in the body
- Endocrine
- The endocrine system is composed of ductless glands (glands that do not have tubes).
- Exocrine
- Glands that have ducts are called exocrine glands.
- The endocrine system sends messages to the whole body and waits for a part of the body to react to these mesages
- But not every part of the body will react to the hormones
- It depend on what hormone is send out
- For example, when follicular stimulating hormones are send from the pituitary gland, it is only going to affect the ovaries and the testes, but when growth hormone is send out, it will affect all the cells in the body.
- Anything that sends out these messages is called a gland
- The chemical that these glands send out are called hormones
- The endocrine system is very spread out throughout the body
- Lymph vessels are found in all tissues except the central nervous system, the bone marrow and tissues
without blood vessels like cartilage.