Hormones can be both autocrine and paracrine within tissues and organs.
A. True
B. False
hormones are chemical messenger secreted by very specific cells. these hormones are sent via blood to the target cell where it can perform its function.
some hormone examples are :
- Insulin.
- Estrogen
- Progesterone
- Prolactin
- Testosterone
lets understand what paracrine and autocrine signalling means
paracrine signalling: the hormone is secreted by the source cell and it diffuses into its neighbourhood and acts locally. eg of such a hormone is estrogens which is produced in the ovaries and are important for the maturation of ovarian follicles
autocrine signalling: a cell secretes a hormone that binds to autocrine receptors on that same cell, leading to changes in the cell. eg for this is insulin is secreted by the β cells and interestingly, insulin receptors are also expressed on β cells
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