Principles of Biological Regulation Quiz

Biological regulation aims to maintain homeostasis, not necessarily equilibrium.

Insulin facilitates the uptake of glucose by cells, reducing blood sugar levels.

Enzymes accelerate biochemical reactions, essential for various regulatory processes.

While important for metabolism, the liver is not primarily an endocrine gland.

Homeostatic systems strive to maintain stability within the internal environment.

Parathyroid hormone increases calcium levels in the blood by stimulating bone resorption.

Negative feedback loops counteract deviations from set points, promoting stability.

The hypothalamus regulates various bodily functions, including hunger and thirst.

While important, protein synthesis is not a direct mechanism of cell signaling.

Transcription factors bind to DNA and regulate the transcription of specific genes.

Positive feedback intensifies responses, leading the system away from its original state.

Negative feedback restores parameters to their optimal levels, maintaining homeostasis.

Positive feedback amplifies the response, leading to further intensification, as seen in childbirth.

Allosteric regulation modulates enzyme activity by binding at sites distinct from the active site.

Homeostatic imbalance results from the failure of regulatory mechanisms, leading to instability.