Ed Biology Gcse Coursework

Ed Biology Gcse Coursework-54
Firstly, we will discuss the control of blood glucose levels in mammals, and then will look at the role of plant stomata in regulating water loss.The human body has a number of mechanisms in place to regulate the storage and release of molecules for energy.

Firstly, we will discuss the control of blood glucose levels in mammals, and then will look at the role of plant stomata in regulating water loss.

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Figure 1 is a simple representation of a rather complicated process.

Here, the several types of negative feedback circuits involved in temperature control have been summarised into one.

Clearly, this is another example of homeostasis and it is outlined in Figure 2.

Two enzymatic hormones are utilised by the body to control the interchange of glucose as an energy molecule and glycogen as a storage molecule.

The most common form of control in homeostasis is known as negative feedback, in which an excess or deficit in a homeostatic system triggers its own regulation.

The diagram below illustrates this concept in reference to the control of temperature (Figure 1).

When glucose levels are high, the subsequent release of calcium results in calcium binding to calmodulin.

Together, the two molecules promote insulin vesicles to be released from the pancreas.

The term homeostasis was first coined by Walter Cannon in 1929 to literally mean ‘steady state’.

It describes the dynamic equilibrium by which internal constancy is maintained within set limits by regulation and control.

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