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Hormones are chemcial messengers released into the blood stream to be carried through out the body to target cells.
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∙ 15y ago
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The hormones are carried by the blood of the circulatory system to the genetically conditioned?
target organs
What hormones can enter the target cell and bind to receptors in the nucleus?
steriod hormones - since they are lipophilic and fusses with the membrane to enter teh cell.
Are hormones target molecules or signal molecules?
Hormones affect target cells because target cells have receptors that bind with certain hormones (they're specific). If a cell does not have a receptor then it is not affected by hormones. Target cells (which do have the receptor for a particular hormone) would be affected by the hormone.
Why do protein hormones need second messenger to activate target cell?
Protein hormones that need second messenger to activate a target cell are hydrophobic. They therefore need these second messengers in order to penetrate into the cell membrane. steroid hormones are hydrophilic so they do not need second messengers.
How do hormones leave the cell?
Most hormones reach target cells by blood . Some types of hormones reach target cells by other ways e.g. pheromones via air ; local hormones via diffusion etc .
What do you call the cell that accepts specific hormones?
Target cell
The hormones are carried by the blood of the circulatory system to the genetically conditioned?
target organs
What hormones can enter the target cell and bind to receptors in the nucleus?
steriod hormones - since they are lipophilic and fusses with the membrane to enter teh cell.
Are hormones target molecules or signal molecules?
Hormones affect target cells because target cells have receptors that bind with certain hormones (they're specific). If a cell does not have a receptor then it is not affected by hormones. Target cells (which do have the receptor for a particular hormone) would be affected by the hormone.
The receptors for thyroid hormones are found?
within the nucleus of the target cell
Why do protein hormones need second messenger to activate target cell?
Protein hormones that need second messenger to activate a target cell are hydrophobic. They therefore need these second messengers in order to penetrate into the cell membrane. steroid hormones are hydrophilic so they do not need second messengers.
How does a hormone identify its target?
Only target cells have receptors inside cytoplazm (for steroid hormones) or on cell membrane (for protein hormones) that make the hormone active.
What is the difference between protein hormones and steroid hormones and how they communicate with their target cells?
Steroid hormones arelipid-soluble and can dissolve easily into the cell membrane of the target cell to connect with receptors. Protein hormones are water-soluble and connect with receptors at the membrane because it can't diffuse through the membrane.
The receptors for catecholamine and polypeptide hormones are found?
on the outer surface of the target cell
How do hormones leave the cell?
Most hormones reach target cells by blood . Some types of hormones reach target cells by other ways e.g. pheromones via air ; local hormones via diffusion etc .
What are the chemicals secreted by the endocrine system?
The chemicals secreted by the endocrine system are known as hormones. These chemical messengers are carried by the circulatory system to their target tissues.
Where would steroid hormones most likely interact with their target cell?
In the nucleus.
