Answer:
When blood glucose level rises beyond the threshold levels, the pancreas secrets hormones insulin. The latter ensures entry of glucose into the cells through Glut transporters for cellular utilization, therefore reducing the blood levels., and promotes storage as glycogen in the liver and muscles.
How ever if the glucose levels drops below the set point, an hormone glucagon is also produce by the pancreas to cause the liver o withdrawal and breakdown glucose storage as glycogen back to glucose thus raising the blood glucose level back to the normal levels.
This is an example of negative feedback mechanism, because the increase in the input levels (blood glucose levels) brings about a counter mechanisms (insulin secretions)as output , to reduce the elevated levels by promoting entry into the cells,, thus bringing the levels to threshold levels.
Thus insulin is acting in a negative feedback mechanism to control blood glucose levels
Explanation:
The various measures that can make your environment a sustainable environment is the use of renewable energy and recycling of materials.
<h3>What is environmental sustainability?</h3>
Environmental sustainability is defined as the controlled way human beings Interact with their immediate environment in such a way that depletion or degradation of natural resources is avoided.
Examples of environmental sustainability include the following:
- Renewable energy, such as solar, wind, hydroelectric, and biomass.
- Recycling of metals, such as iron and steel, and minerals.
The environmental sustainability is important due to the following:
- Increased energy, food and human-made resources we use every day.
- Rapid increase in population growth farming and manufacturing, which can lead to more greenhouse gas emissions, unsustainable energy use, and deforestation.
Learn more about pollution here:
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I believe it's c.) short-term goal
Valves are the thin flat tissues in the heart that acts like a one way door. The valves serve the role of preventing the back flow of blood. The heart has four major valves; that is the tricuspid valve located between the right atrium and the right ventricle, Pulmonary valve at the right ventricle and the pulmonary artery, bicuspid valve located between the left atrium and the left ventricle, and the aortic valve at the base of the aorta.
