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i need help with a science question - BIOLOGY
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Your body moves substances like glucose and oxygen into our blood.
These are both needed for aerobic respiration and we use them to get ATP which our body uses for energy.
This ATP is useful for most things, but what about growing?
What do we need to grow, and how do we get these substances?
These are both needed for aerobic respiration and we use them to get ATP which our body uses for energy.
This ATP is useful for most things, but what about growing?
What do we need to grow, and how do we get these substances?
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#2
Mitosis and apoptosis is responsible for cell division and growth. Hormones regulate the rate of these processes.
Last edited by adzz.s1; 6 months ago
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(Original post by adzz.s1)
Mitosis and apoptosis is responsible for cell division and growth. Hormones regulate the rate of these processes.
Mitosis and apoptosis is responsible for cell division and growth. Hormones regulate the rate of these processes.
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Further to that, there are loads of additional processes required for growth.
A personal favourite of mine is angiogenesis (the growth of new blood vessels). This can be seen clearly in cancer- you get rapid mitosis and apoptosis, and a stupendously high rate of blood vessel formation. (I should note that in tumours these vessels are different from those formed during "normal" growth and development).
But a regulated occurrence of angiogenesis in normal growth supplies the "growing" (thanks to mitosis) areas of the body with the glucose and oxygen that they need to survive.
The key substance that regulates this is VEGF (vascular endothelial growth factor). As you get mitosis, some of those cells will find themselves further away from existing blood vessels, therefore they don't receive as much oxygen (becoming hypoxic) as cells closer to these vessels. These relatively hypoxic cells produce VEGF. VEGF stimulates new sprouts to form from these existing blood vessels --> forming new vessels closer to the cells that were further away. End result: more oxygen/glucose/etc provided to these cells.
I hope that helps
A personal favourite of mine is angiogenesis (the growth of new blood vessels). This can be seen clearly in cancer- you get rapid mitosis and apoptosis, and a stupendously high rate of blood vessel formation. (I should note that in tumours these vessels are different from those formed during "normal" growth and development).
But a regulated occurrence of angiogenesis in normal growth supplies the "growing" (thanks to mitosis) areas of the body with the glucose and oxygen that they need to survive.
The key substance that regulates this is VEGF (vascular endothelial growth factor). As you get mitosis, some of those cells will find themselves further away from existing blood vessels, therefore they don't receive as much oxygen (becoming hypoxic) as cells closer to these vessels. These relatively hypoxic cells produce VEGF. VEGF stimulates new sprouts to form from these existing blood vessels --> forming new vessels closer to the cells that were further away. End result: more oxygen/glucose/etc provided to these cells.
I hope that helps
Last edited by cathasatail; 6 months ago
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(Original post by cathasatail)
Further to that, there are loads of additional processes required for growth.
A personal favourite of mine is angiogenesis (the growth of new blood vessels). This can be seen clearly in cancer- you get rapid mitosis and apoptosis, and a stupendously high rate of blood vessel formation. (I should note that in tumours these vessels are different from those formed during "normal" growth and development).
But a regulated occurrence of angiogenesis in normal growth supplies the "growing" (thanks to mitosis) areas of the body with the glucose and oxygen that they need to survive.
The key substance that regulates this is VEGF (vascular endothelial growth factor). As you get mitosis, some of those cells will find themselves further away from existing blood vessels, therefore they don't receive as much oxygen (becoming hypoxic) as cells closer to these vessels. These relatively hypoxic cells produce VEGF. VEGF stimulates new sprouts to form from these existing blood vessels --> forming new vessels closer to the cells that were further away. End result: more oxygen/glucose/etc provided to these cells.
I hope that helps
Further to that, there are loads of additional processes required for growth.
A personal favourite of mine is angiogenesis (the growth of new blood vessels). This can be seen clearly in cancer- you get rapid mitosis and apoptosis, and a stupendously high rate of blood vessel formation. (I should note that in tumours these vessels are different from those formed during "normal" growth and development).
But a regulated occurrence of angiogenesis in normal growth supplies the "growing" (thanks to mitosis) areas of the body with the glucose and oxygen that they need to survive.
The key substance that regulates this is VEGF (vascular endothelial growth factor). As you get mitosis, some of those cells will find themselves further away from existing blood vessels, therefore they don't receive as much oxygen (becoming hypoxic) as cells closer to these vessels. These relatively hypoxic cells produce VEGF. VEGF stimulates new sprouts to form from these existing blood vessels --> forming new vessels closer to the cells that were further away. End result: more oxygen/glucose/etc provided to these cells.
I hope that helps
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