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activation of mRNA, which increases protein synthesis in the cell
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What is the term for hormones that are lipid-soluble and can pass through cell membranes?
steroid hormones
It is impossible for water-soluble hormones to regulate gene expression since only lipid-soluble hormones can penetrate the cell membrane true or false?
false
Vitamins can be either water-soluble or lipid-soluble?
Careful, there are actually two biochemical Forms of Vitamins - call them Classes: 1) Water soluble, and 2) Lipid soluble.
Why some steroid hormones do not require a membrane receptor?
Because they are lipid soluble and therefore are readily diffusable across the cell membrane. Their receptors are found within the cytoplasm or nucleus
What is soluble in a lipid?
For example vitamin E.
A major determinant of a hormone’s mechanism of action is?
whether the hormone is water soluble or lipid soluble
What are steroid hormones soluble in?
Lipids (fat-soluble), they can therefore be administered orally.
What is the term for hormones that are lipid-soluble and can pass through cell membranes?
steroid hormones
Examples of water soluble and lipid soluble compounds in living organism?
Amino acid based hormones such as Human Growth Hormone is an example of water soluble compounds. Steroid hormones and thyroid hormone are examples of lipid soluble compounds in living humans.
It is impossible for water-soluble hormones to regulate gene expression since only lipid-soluble hormones can penetrate the cell membrane true or false?
false
Some steroid hormones do not require a membrane receptor because?
they are lipid soluble and pass through the bilayer
Is growth hormone water soluble or lipid soluble?
lipid soluble
Is estrogen a lipid soluble?
yes, estrogen is a lipid soluble hormone.
Is Golgi body lipid-soluble?
are compounds being packaged lipid-soluble or lipid-insoluble in the golgi body
Why can the progesterone-like hormones of birth control pills be taken orally while hormones like insulin must be injected?
Insulin is protein soluble and would be unable to cross the wall of the gastrointestinal tract without being broken down and the hormones in birth control pills are lipid soluble are correct.
What are the two general modes of hormone action?
Lipid-soluble hormones are able to penetrate through the cell membrane and bind to receptors located inside the cell. Such hormones diffuse across the plasma membrane and target those receptor cells found within the cytoplasm. Lipid-soluble hormones target the cytoplasmic receptors which readily diffuse into the nucleus and act on the DNA, inhibiting and stimulating certain proteins. lipid-insoluble are unable to penetrate through the plasma membrane and function with their target cells in a much different and complex manner. Lipid-insoluble hormones must bind with cell-surface receptors which follow a different path involving a second messenger. The hormone's inability to penetrate the membrane requires a second messenger which translates the outer message and functions within the cell.
Is epinephrine lipid soluble?
They are water soluble
