Blog Post: In your own words, summarize how homeostasis is maintained in one of the following situations (you may not write about your group assigned choice from the class activity).
1) Guard cells in plant leaves
2) Insulin and Blood Glucose
3) Carbon Dioxide and Blood pH
Your response should be posted in complete sentences using details. Due Monday, Nov. 2, 2009.
41 comments:
Carbon Dioxide and Blood pH
Carbon dioxide maintains homeostasis be adjusting your breathing rate. The brain carefully monitors the blood pH, which is affected by the concentration of carbon dioxide in the blood, and adjusts the breathing rate accordingly.
Abigail
period 4
Guard Cells In Plant Leaves:
Guard cells are cells that border pores on the surface of a leaf. On a hot or dry day, water escapes from the leaf, and the leaf identifies the water shortage. To maintain homeostasis, or to maintain a stable internal environment for the leaf, the guard cells adjust or modify its shape to close the pores and it decreases evaporation from the leaf. The guard cells close the pores of the leaf so that the leaf does not dry out. At this time, gas exchange is narrowed down. Photosynthesis also slows down, this happens because there is a shortage of Carbon dioxide.
Elizabeth J.
Period 4
Guard cells maintain homeostasis by opening its pores to bring in what ever the plant needs such as food or water. It also is able to close it's pores to keep water from escaping whenever it really needs the water. So basically it maintains homeostasis by keeping a certain amount of food and water inside itself.
Insulin And Blood Glucose-
When the glucose level in the body is too high, an organ called the pancreas secretes insulin into the blood stream. The glucose then moves from the blood stream into the other cells in the body, which results in a lower glucose level in the blood.
(Sara Dorfman - period 4)
GUARD CELLS IN PLANT LEAVES:
When the leaves of a plant detect a dry hot day, the guard cells close up the pores so there is less evaporation. Guard cells are cells that surround the pores on the surface of a leaf. When there is water left in the soil,the weather is warm and the sun is present, the guard cells open up the pores and let the water out and Carbon Dioxide in. But when the guard cells sense a dry day, they close up the pores so the leaf doesn't dry up. This process slows down photosynthesis because of the little Carbon Dioxide being exchanged with the leaf and the environment.
This is an example of homeostasis, because the plant leaves are able to maintain themselves internally even though their outside environment might change. The guard cells know when it's going to be a warm day where water is available. Therefore, it will open up the pores and let the exchange of water and Carbon Dioxide occur. When the guard cells detect a dry day where water might be scarce, they close up their pores and hold on to whatever water is left so the leaf won't dry up. Although the plant's external environment might change, it finds a way to respond with an appropriate corrective action that returns the organism's systems to normal.
Insulin is a hormone (chemical secreted into the blood and travels around the body to its target organ) Insulin helps control how much glucose dissolves in the blood and it also prevents the sugar level from over rising.
The control of blood sugar level is a homeostatic mechanism. Homeostasis maintains both Insulin and Blood Glucose because they both depend on each other to keep the body maintained.
Sia Kalamaras
9th grade
Period 4
Homestasis is maintained in Isluin and Blood Gluscose. Insulin is a hormone that prompts glucose to move from the blood into body cells, resulitng in a lower glucose level in the blood. When a sensor detects high blood sugar level, the pancreas creates insulin. The blood sugar level drops in the body. In result as a Negative Feedback, lowered blood sugar leads to shutting off insulin production. Homestasis is maintained by shutting off insulin production whenthe blood sugar level drops. If something happens in the body, something else happens to keep the body level.
Gabrielle
Period 4
guard cells in plant leaves maintain homesostasis by making pores open more when there is alot of sun, and close a little when the sun isnt around. the pores also open when its breathing out oxygen.
Caroline Kanavatsas 2nd period.
To maintain homeostasis, guard cells surround stomata in leaves and control the size of the hole. By reducing the size of the hole, less water vapor is able to escape.
To maintain homeostasis in carbon dioxide and blood pH, the brain monitors the amount of carbon dioxide in the blood, and if there is too much the respiratory function is increased.
Giorgina Orofino, period 2
Homeostasis is maintained in Guard cells in plant leaves because when theres no water
the plants pores nearly close up, but when there is water it opens up. When Guard cells are open
there allowing carbone dioxide to enter while water exits. When the gaurd cells have barely
closed its protecting the leaf from drying out, so it doesnt let all the water evaporate.
Homeostasis is maintained in Carbon dioxide and Blood pH because it adjustes your breathing
rate when there is too much carbon dioxide in your blood. Since your brain is like a monitor, it can
detect if there is too much carbon dioxide in a persons blood, when it does it triggers the respitory
function to increase.
Homeostasis is maintained in guard cells that are in plant leaves by being able to open and close the pores to either let the water from escaping or letting more water come in. It controls the size of the hole. If the plant is in a dry environment, the guard cells reduces the hole/closes the pore to keep the water from escaping so the plant doesn't get dry and can survive with that water and vice-versa.
- ashley u. Pd 4
Diego Huerta 902
Homeostasis is maintained in Carbon Dioxide and blood pH depending on the range of your breathing rate it sometimes rises and in other cases drops so that your body can maintain homeostasis.
homeostais is maintained in insulin fom the sugar in the body's blood glucose because it gives the insulin enough sugar to carry out life processes. in people with diabetes, they need to get certain amounts of sugar so their internal bodies are stable.
DIMITRI KOURTIS
Insulin and Blood Glucose maintains homeostasis by the sugar being in the liver.The human body wants blood glucose maintained in a very narrow range. Insulin and glucagon are the hormones which make this happen. Both insulin and glucagon are secreted from the pancreas, and are referred to as pancreatic endocrine hormones.This is how it is maintained.
-Chelsea M.
period 2
D.Seizinger Class902
In the topic Insulin In Humans,Homeostasis is maintained because the body finds something wrong,and with too much high blood sugar it triggers the pancreas then it produces insulin.
Guard Cells in Plant Leaves
When there is a small amount of water in the plant the leves close. This is to store the water that it already has inside. If there is allot of water the plant leaves open. This is so that the leaved can get more water stored inside of them. That is how it maintains homeostasis.
CARBON DIOXIDE AND BLOOD PH- the amount of oxygen in the blood does not effect a person's breathing rate unless oxygen levels fall dangerously low
- the brain carefully monitors the bloods PH. Which is affected by the concentration of CO2 in the blood and adjusts the breathing rate accordingly
-when your asleep your cellular respiration slows down
GUARD CELLS IN PLANT LEAVES- when theres no water left the plant pores close to save the water so it doesnt evaporate.
INSULIN AND BLOOD GLUCOSE- when the blood sugar level gets to high the pancreas releases insulin to lower the the level of sugar
Guard cell plants maintain homeostasis by uard cells surround stomata in leaves and control the size of the hole. By reducing the size of the whole, less water vapour is able to escape and vice-versa. Varying the size of the stomata over time allows the plant to remain at a relatively constant hydration level.
Chris Marks
Period 2
One example of the body maintaining homeostasis is Insulin and Blood glucose. A person that has Diabetes has to make it a priorty to regulate thier blood glucose levels. The way they can regulate it is through insuline. When a person has an irregulare Blood glucose level it is usually very low or very high (above 180).
When the level is too high the insuline helps to bring it back to a normal level. For examlple, after a person eats they might check their Blood level to monitor it to bring their body back to its normal homeostasis.
Guard cells surround stomata in leaves and control the size of the hole. By reducing the size of the whole, less water vapour is able to escape and vice-versa. Varying the size of the stomata over time allows the plant to remain at a relatively constant hydration level.
The human body wants blood glucose (blood sugar) maintained in a very narrow range. Insulin and glucagon are the hormones which make this happen. Both insulin and glucagon are secreted from the pancreas, and thus are referred to as pancreatic endocrine hormones. The picture on the left shows the intimate relationship both insulin and glucagon have to each other. Note that the pancreas serves as the central player in this scheme. It is the production of insulin and glucagon by the pancreas which ultimately determines if a patient has diabetes, hypoglycemia, or some other sugar problem.
The blood pH is made more acidic by carbon dioxide. This is caused by increased metabolic rate in the body, since carbon dioxide is a waste product of respiration. This would make the blood too acidic, and denature enzymes. So, the body has a way of maintaining a relatively constant pH. This is maintained because by the combination of carbon dioxide with water, forming hydrogen carbonate ions, which are acidic. in this way, homeostasis effects pH.
samantha matos
Alexandra K. Period 3
Blood carries carbon dioxide from the body tissues to the lungs, where it is exhaled. Carbon dioxide levels in blood maintains homeostasis in the body by pumping the blood to distribute oxygen for energy and to increase pH levels. The faster you breath the pH level increases and more carbon dioxide is released from the body.
Luca D. Period 3
Guard cells in plants.
Guard cells in plants help to maintain homeostasis in plants by regulating the release of water vapor from the plant. By enlarging themselves they do not allow alot of vapor to escape and by making themselves smaller they allow more to escape. When a plant need more water the guard cells will enlarge and vice versa in order to maintain homeostasis.
Homeostasis is maintained in carbon dioxide and blood ph by your body depending on the range of your breathing rate. The brathing rate speeds up so that more can be made.
Guard Cells In Plant Leaves
- Pores allow gas exchange in the leafs and environment. Water exits from the leaf and CO2 enters. This happens when the sun is shining, there is warm air, and water in the soil. Swollen cells open carbon dioxide which is necessary for photosynthesis. Water goes up the the vascular system. At night, photosynthesis slows, water exits, it shrinks and the pores close.
Insulin and Blood Glucose maintains homeostasis by, When you have just eaten a meal, levels of glucose are e high in the bloodstream. Insulin makes the liver and muscles cells to absorb glucose and to convert it into the inslouble carbohydrate
Alexis.S period 2 .
Guard cells surround stomata in leaves and control the size of the hole. By reducing the size of the whole, less water vapour is able to escape and vice-versa. Varying the size of the stomata over time allows the plant to remain at a relatively constant hydration level. The leaf maintains homeostasis because when there is little water it closes up, but when there is water water it opens.
Michelle Rivera period 3
MELISSA SANCHEZ
PERIOD 3
Homeostasis is maintained in different ways,Carbon Dioxide and Blood pH and Insulin and Blood Glucose. In order to control the blood pH in the body the lungs need to release carbon dioxide. The blood moves carbon dioxide into the lungs, where it well be released and replaced by oxygen and the pH of the blood lowers and the acidity rises. The Insulin and glucagon are hormones in your body to help maintain and control the level of glucose in the blood. For example after you eat your body receives a lot of sugar in your blood, and the insulin helps to control the glucose so it won't create a great health risk. Homeostasis is very important to have in your body, it helps prevent things from happening if your body responds to a stimulator
Naomi Whyte period #3
homeostasis can be maintained in the the blood when enough insulin is present. the insulin helps the blood sugar to stay at a normal rate so that the body can stay fit and healthy.
Homeostasis is maintained in guard cells in plant leaves by opening and closing pores. When the sun is shining, there is nice weather, and their is water in the soil, guard cells in plant leaves open to allow exchange between the leaf and the enviornment. But when the sun is shining, the weather isn't so nice, and there is little water in the soil, the guard cells close, unable to allow gas exchange between the leaf and the enviornment.
Michelle
Period 4
Guard Cells In Plant Leaves
Guard cells border the pores on a leaf's surface. To maintain homeostasis On a hot or dry day, the guard cells close up the pores so evaporation decreases. If there is water left in the leaf, the guard cells open up the pores and let the water out and Carbon Dioxide in. On a dry day it closes up so the leaf doesn't dry up. This slows down Photosynthesis because of the shortage of Carbon dioxide.
Insulin and blood glucose maintain homeostasis. Insulin is a hormone which means its secreted into the body through an organ, which is the pancreas. When your blood sugar rises more insulin is secreted. Therefore when it drops less is secreted. So that is how insulin keeps a balance in your blood sugar levels.
- Aliyah caliguiri. period four
...guard cells in plant leaves are the cells that are around the pores on the leaf. the homeostasis helps the palnt open and close the pores when ever the plant needs somthing such as water .
taylorgeorgio
Michelle Ganpat
Period 4
Insulin and Blood Glucose:
Homeostasis is maintained when Glucose levels go down from normal in the human body. The hormone then promps the release of glucose that is stored in the liver. When levels are too high then an endocrine organ called pancreas secretes insulin into the blood stream. Insulin helps control how much glucose dissolves in the blood. It prevents the sugar level from rising too high. Insulin and Glucose depend on each other so the body keeps maintaining a stable internal environment.
Guard cells in plant leaves...
The gaurd cells are made to border on the surface of the leaf.On a day where it's not raining and its very hot the water escapes from the leaf. The leaf notices it needs more water, so to mantain it's homeostasis the guard cells fix it's shape to close the pores. This makes evaporataion decrease from the leaf.The point of closing the pores of the leaf is so the leaf doesn't dry out.
i did this assighnment in my source book but spoke to you about it in class so:
To maintain homeostasis (to maintain a stable internal environment) for the leaf, the guard cells change its shape to close the pores which will decreases evaporation from the leaf. Gaurd cells Border pores on surfaces of leaves. It controls what enters and exits. If it is dry out the pores will close to prevent water loss. If it is moist out the pores will open.
guard cells in plant leaves:
the pores on leave open up when they have a low amount of water which is taken on hot and dry days. when it rains the pores open up to allow water to come into the leaves.the guard cels are the cells that surround the pores on the surface of the leaves. the homeostasis in this is that the leaves are able to maintain themselves in all types of wheater. the guard cells are the ones who know when its a nice or rainy day outside. because of this it will know when to allow the ccarbon dioxide and excahnge of water happen. when it is a ry day the guadcells send a signal to keep the pores closed so that the leaf doesnt run out of water.
guard cells in plant leaves:
the pores on leave open up when they have a low amount of water which is taken on hot and dry days. when it rains the pores open up to allow water to come into the leaves.the guard cels are the cells that surround the pores on the surface of the leaves. the homeostasis in this is that the leaves are able to maintain themselves in all types of wheater. the guard cells are the ones who know when its a nice or rainy day outside. because of this it will know when to allow the ccarbon dioxide and excahnge of water happen. when it is a ry day the guadcells send a signal to keep the pores closed so that the leaf doesnt run out of water.
The guard cell changes its shape to close the leafs' pours to reduce evaoration.
Matt Aponte pr. 4
Homeostasis is maintained in different ways, it can be Insulin, blood pH, carbon dioxide and Blood Glucose. i believe the best way it is maintained when it is invloved with our body! The homeostasis maintains our blood when there is enough insulin presented. The insulin helps with the level of blood sugar to keep it on a normal pace.
Kassie Rodriguez
Period 2
Insulin And Blood Glucose-
After eating, the glucose levels in the body may be too high. If this occurs, an organ called the pancreas lets out insulin to prevent the sugar level from rising too high. Insulin and Glucose depend on each other to maintain homeostasis.
alyssa rivera.
period four.
Maria V
3rd Period Make up Homework !
The breathing rate goes high and low until reaching a normal state. When taking in the air homeostasis adjusts our breathing rate with makes our blood's carbon dioxide regulate also.
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