CHAPTER 13.1 (F4): HOMEOSTASIS (PART 1)

What is homeostasis?

• The process of cell division

• The regulation of physical and chemical factors of the internal environment

• The breakdown of nutrients in the body

• The process of photosynthesis

Why is homeostasis important for cells?

• It allows cells to divide rapidly

• It helps cells to function in optimum conditions

• It enables cells to produce more energy

• It causes cells to change shape

Which of the following physical factors need to be regulated in the internal environment?

• Temperature, osmotic blood pressure, and blood pressure

• pH value, concentration of minerals, and blood sugar concentrations

• Heart rate, breathing rate, and digestion

• Muscle contraction, nerve impulses, and reflex actions

What chemical factors need to be regulated in the internal environment?

• Temperature and blood pressure

• pH value, concentration of minerals, and blood sugar concentrations

• Heart rate and breathing rate

• Muscle contraction and nerve impulses

What triggers the homeostatic mechanism in the body?

• Increase in physical activity

• Deviation from the normal range of physical and chemical factors

• Changes in weather conditions

• Emotional stress

What is the role of homeostasis in the internal environment?

• It changes the external environment to match the internal environment.

• It regulates the internal environment to maintain a constant state.

• It disrupts cell activity to adapt to external changes.

• It ensures the external environment remains constant.

Why is it important for cell activity to continue at the optimum level?

• To ensure the external environment remains unchanged.

• To allow cells to function in a chaotic manner.

• To maintain overall health and functionality of the organism.

• To disrupt the internal environment.

What happens to a factor that exceeds the normal range in homeostasis?

• It is brought down to the normal range.

• It is increased further.

• It remains unchanged.

• It is eliminated from the system.

In homeostasis, what occurs when a factor falls below the normal range?

• It is decreased further.

• It is increased to the normal range.

• It remains unchanged.

• It is ignored by the system.

What is the role of a regulatory system in homeostasis according to the diagram?

• To increase the deviation from the normal range

• To maintain the deviation from the normal range

• To return a factor's value to the normal range

• To eliminate the normal range