Hormones Flashcards
Each hormone works on the particular cells that are able to receive and respond to that hormones message. What are these cells called?
Target cells
When a hormone is released, it travels from the gland to its target cells via the?
Bloodstream
What are endocrine glands?
Secretory cells which release their secretions into the blood stream
What are responsible for the control and levels of hormones in the body?
1) hypothalamus
2) pituitary gland
Hormones can only interact with cells which possess the appropriate hormone receptors, such cells are called?
Target cells
Each receptor is specific for a particular hormone. Similar to?
Lock and key
Steroid hormones are derived from what?
Cholesterol
Protein hormones consist of strings of?
Amino acids
In which cell organelle are protein hormones synthesised?
Rough endoplasmic reticulum
Amine, peptide and protein hormones are water soluble, which makes what difficult?
Diffusion through the membrane
Most hormones synthesis and release is regulated through?
Negative feedback mechanisms
The activity or endocrine glands, tissue or cells is controlled in three ways?
1) chemical
2) neural
3) hormonal
The hypothalamus serves as a link between what 2 systems?
The nervous and endocrine system
Steroid ( lipid soluble ) hormones require a ? Protein in order to be transported within the bloodstream
Binding
Water soluble hormones are freely transported within the?
Blood