Biology Topic 6.5 Quiz

The endocrine system is a collection of glands that secrete hormones directly into the bloodstream. These hormones are then transported to various parts of the body to regulate a wide range of physiological processes. This system plays a crucial role in maintaining homeostasis and coordinating the body's responses to internal and external stimuli. Therefore, the statement that the endocrine system consists of glands that release hormones into the blood is correct.

Type I Diabetes is a condition that has early onset, typically diagnosed in childhood or adolescence. It occurs when the beta cells in the pancreas do not produce enough insulin, which is necessary for regulating blood sugar levels. Unlike Type II Diabetes, where target cells become insensitive to insulin, in Type I Diabetes the main issue lies in the insufficient production of insulin. While diet can play a role in managing the condition, it cannot fully control it as the primary problem is the lack of insulin production.

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Negative feedback is a regulatory mechanism that helps maintain stability and homeostasis within a system. In the context of the internal environment, negative feedback ensures that certain physiological variables remain within acceptable limits. It does so by detecting any deviations from the desired set point and initiating corrective actions to bring the system back to its optimal state. By continuously monitoring and adjusting the internal environment, negative feedback helps prevent extreme fluctuations and maintains overall balance. Therefore, the statement that negative feedback is used to keep the internal environment between limits is true.