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Control of the internal environment

The maintenance of a steady internal state in the body almost regardless of changes in either the
external or internal conditions is known as homeostasis. This involves a high level of control and
coordination, involving positive and negative feedback systems. Homeostasis plays an important role…

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arteriovenous shunt. When someone is exercising, the shunt is closed which allows more blood to flow
through the capillaries at the surface of the skin. This is known as vasodilatation and is why when people
are exercising they appear red and flushed. As a result, more heat is lost. Also…

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