Homeostasis and Body Regulation Quiz

Homeostasis

• Homeostasis: Maintaining a stable internal environment.

Thermoregulation

• Control center for thermoregulation: Hypothalamus.

Osmoregulation

• Osmoregulation: Regulating water content in the body.

Heat Production Mechanisms

• Sweating is NOT a mechanism for heat production.
• Shivering, increased metabolism, and hormonal release (e.g., thyroxine) increase heat production.

Body's Response to Cold

• Responses to cold exposure include shivering and reduced skin blood flow.

Blood Glucose Regulation

• Key organ in blood glucose regulation: Pancreas.

Negative Feedback in Homeostasis

• Negative feedback counteracts changes and restores the body to its set point.

Heat Acclimatization

• Heat acclimatization increases sweat rate.

Importance of Stable Internal Conditions

• Maintaining stable blood pressure, CO2 levels, and body temperature prevents cell damage and ensures normal physiological functions.

Hormonal Response to Cold

• Thyroxine increases heat production in response to cold.

Body's Response to Overheating

• Responses to overheating include sweating and vasodilation.

Negative Feedback and CO2 Levels During Exercise

• When CO2 levels rise during exercise, breathing rate increases to exhale more CO2 (negative feedback).

Negative Feedback Loop Example

• Thermoregulation is an example of a negative feedback loop.

Long-Term Response to Heat Exposure

• Increased plasma volume is a long-term adaptation to heat exposure.

Consequences of Poor Water Regulation

• Improper water regulation can cause cells to burst from excess water.

Oxygen and Carbon Dioxide Regulation

• Respiratory system primarily regulates oxygen and carbon dioxide levels.

Catecholamines and Thermoregulation

• Catecholamines (like adrenaline) increase heat production by stimulating metabolic processes.

Cold Acclimatization

• Cold acclimatization is the body's ability to adapt to long-term cold exposure.

Blood Pressure Regulation

• Blood pressure is regulated through negative feedback mechanisms involving baroreceptors.

Osmoregulation and Physiological Condition

• Osmoregulation controls water and salt balance.