Living Organisms and Homeostasis - NYS Regents Review

Front

What is dynamic equilibrium in living organisms?

Back

Dynamic equilibrium refers to the state of balance within an organism where internal conditions remain stable despite external changes.

Front

What is the primary function of vacuoles in single-celled organisms?

Back

Vacuoles store materials such as nutrients, waste products, and other substances necessary for the cell's survival.

Front

What is the correct sequence of organization in a paramecium?

Back

The correct sequence is organelles → organism.

Front

What happens to red blood cells in a hypertonic solution?

Back

In a hypertonic solution, the concentration of dissolved salt is greater outside the cells, causing water to leave the cells and leading to cell shrinkage.

Front

What role do enzymes play in biological processes?

Back

Enzymes are catalysts that speed up chemical reactions in the body, including the breakdown of substances.

Front

Define homeostasis.

Back

Homeostasis is the process by which living organisms maintain a stable internal environment despite changes in external conditions.

Front

What is the function of mitochondria in cells?

Back

Mitochondria are known as the powerhouse of the cell, as they produce energy (ATP) through cellular respiration.

Front

What is the difference between cellular differentiation and dynamic equilibrium?

Back

Cellular differentiation is the process by which cells become specialized for specific functions, while dynamic equilibrium refers to the balance of internal conditions.

Front

What is the significance of organ systems in multicellular organisms?

Back

Organ systems work together to perform complex functions necessary for the survival and health of the organism.

Front

How do antigens relate to disorders in the body?

Back

Antigens are substances that can trigger an immune response; disorders may arise when the body incorrectly identifies its own cells as foreign.