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Yes they do if they want to go through the membrane except steroids they can go directly through
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∙ 10y agotrue
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Why hormones can contact virtually all the cells of your body yet only activate the appropiate target cells?
The receptor molecules have the " lock " that the " key " of the hormone fits into . Surface markers, generally glycoproteins, must match up for the hormone to dock at the cell and a signal transduction pathway is then initiated.
What must be present on tissue or an organ in order for it to respond to the presence of a hormone?
There are certain receptors for some specific hormones on the cell membranes of the target cells of the hormone. They are activated by the hormone and combine with it to form a complex that undergoes a series of receptor mediated reactiions to perform the particular function inside the cell. Some hormones pass through the cell membrane and interact with the receptors present on the membrane of cell organelles. Some hormones like thyroxine interact directly with the nucleus and trigger metabolic enzyme synthesis for increasing BMR
Which type of hormone receptor-plasma membrane bound or intracellular- would be expected to provide the most long lived response to hormone binding and why?
Intracellular receptor responses would be longer since they create a hormone-receptor complex which stimulates the production of mRNA, which then creates proteins. This complex must be degraded over time. Also, the entire process takes longer. Intracellular receptor responses would be longer since they create a hormone-receptor complex which stimulates the production of mRNA, which then creates proteins. This complex must be degraded over time. Also, the entire process takes longer.
Why must some hormones bind to membrane receptor on a target cell's surface in order to activate it?
because they cannot cross cell membranes
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.
Why hormones can contact virtually all the cells of your body yet only activate the appropiate target cells?
The receptor molecules have the " lock " that the " key " of the hormone fits into . Surface markers, generally glycoproteins, must match up for the hormone to dock at the cell and a signal transduction pathway is then initiated.
What must be present on tissue or an organ in order for it to respond to the presence of a hormone?
There are certain receptors for some specific hormones on the cell membranes of the target cells of the hormone. They are activated by the hormone and combine with it to form a complex that undergoes a series of receptor mediated reactiions to perform the particular function inside the cell. Some hormones pass through the cell membrane and interact with the receptors present on the membrane of cell organelles. Some hormones like thyroxine interact directly with the nucleus and trigger metabolic enzyme synthesis for increasing BMR
Which type of hormone receptor-plasma membrane bound or intracellular- would be expected to provide the most long lived response to hormone binding and why?
Intracellular receptor responses would be longer since they create a hormone-receptor complex which stimulates the production of mRNA, which then creates proteins. This complex must be degraded over time. Also, the entire process takes longer. Intracellular receptor responses would be longer since they create a hormone-receptor complex which stimulates the production of mRNA, which then creates proteins. This complex must be degraded over time. Also, the entire process takes longer.
Why must some hormones bind to membrane receptor on a target cell's surface in order to activate it?
because they cannot cross cell membranes
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.
Why do hormones cause changes only in specific body organ?
Because most hormones are very specific and are secreted for certain processes. However not all of them are so specific as far as organ function, take GH or the growth hormone secreted by the adenohypophysis (anterior pituitary), this hormone is involved with growth of bone and muscle all over your body. Also, even if hormones are specific to what they cause, those causes all trigger and affect other things within our bodies.
In order for a lymphocyte to respond to an antigen the antigen must?
the antigen must bind to the receptor
How does in vitro technology work?
In vitro therapy involves injecting the new gene directly into the target tissue where the individual cells must pick it up.
Do Endorphins make you feel good?
Because there must be a brain receptor that responds to certain music that you like. This receptor must have originated in Africa because most Africans seem to have the "beat", while most Europeans don't
Why do endorphines make you feel 'good'?
Because there must be a brain receptor that responds to certain music that you like. This receptor must have originated in Africa because most Africans seem to have the "beat", while most Europeans don't
Is adrenaline an active transport or an passive transport?
Actually adrenaline is a hormone that is secreted directly from the pancreas into the blood stream to the target organ, the liver and since there is no selectively permeable membrane it must be passive transport (diffusion).
When shooting a firearm you must be?
Among several possible answers, you must be certain of your target, and what is BEYOND your target.
