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What type of hormone characteristically requires a second messenger?
Wiki User
∙ 9y ago
First messengers may not physically cross the phospholipid bilayer cell membrane to initiate changes within the cell directly and so require a secondary messenger. Second messengers may be coupled downstream to multi-cyclic kinase cascades to greatly amplify the strength of the original first messenger signal.Calcium ions are one type of second messengers and are responsible for many important physiological functions including muscle contraction, fertilization and neurotransmitter release.cAMP is also a second messenger.
First messengers may not physically cross the phospholipid bilayer cell membrane to initiate changes within the cell directly and so require a secondary messenger.
Wiki User
∙ 9y ago
Wiki User
∙ 9y agoFirst messengers may not physically cross the phospholipid bilayer cell membrane to initiate changes within the cell directly and so require a secondary messenger. Second messengers may be coupled downstream to multi-cyclic kinase cascades to greatly amplify the strength of the original first messenger signal.Calcium ions are one type of second messengers and are responsible for many important physiological functions including muscle contraction, fertilization and neurotransmitter release.cAMP is also a second messenger.
Wiki User
∙ 9y agoFirst messengers may not physically cross the phospholipid bilayer cell membrane to initiate changes within the cell directly and so require a secondary messenger.
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Why is a second messenger not necessary in a steroid hormone?
Steroid hormones act in the transcriptional level in the nucleus of a cell, due to their ability to travel through cell membranes (hydrophillic). Second messengers are necessary for hormones that cannot penetrate cell membranes (peptides).
The second-messenger mechanism of hormone action operates by?
Binding to specific receptors and employing the services of G proteins and cAMP.
When a small amount of one hormone allows a second hormone to have its full effect the phenomenon is called?
When a small amount of one hormone allows a second hormone to have its full effect the phenomenon is called
What is the link between a first messenger and a second messenger in a cell that responds to peptide hormones?
g protein
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.
Which type of hormone requires a second messenger?
Virtually all of the protein or amino acid-based hormones exert their effects through intracellular second messengers KT
When a catecholamine or peptide hormone binds to receptors on the surface?
A second messenger appears in the cytoplasm...
A neurotransmitter whose function depends on a second messenger is known as?
A neurotransmitter whose function depends on a second messenger is known as a norepinephrine. It is a hormone that is released by the sympathetic nerves and the adrenal medulla.
Which one of these hormones does not act on a second messenger system is it Glycogen Epinephrine growth hormone or testosterone or acth which one?
testosterone
How do water soluble hormone like calcitonin or epinephrine affects a cell through a second-messenger system?
It binds to the receptors outside the cells
What are two ways in which the chemical message of a hormone is converted into a cell response inside the cell?
The chemical message is converted via the second messenger system
Why is a second messenger not necessary in a steroid hormone?
Steroid hormones act in the transcriptional level in the nucleus of a cell, due to their ability to travel through cell membranes (hydrophillic). Second messengers are necessary for hormones that cannot penetrate cell membranes (peptides).
The second-messenger mechanism of hormone action operates by?
Binding to specific receptors and employing the services of G proteins and cAMP.
When a small amount of the one hormone allows a second hormone to have its full effect the phenomenon is called?
When a small amount of one hormone allows a second hormone to have its full effect the phenomenon is called
When a small amount of one hormone allows a second hormone to have its full effect the phenomenon is called?
When a small amount of one hormone allows a second hormone to have its full effect the phenomenon is called
What does a second messenger always do?
read it:)
Cellular responses to hormones that initiate second-messenger systems include?
Possible activation of several different second messenger systems.
