Cells and Homeostasis

Front

What is homeostasis?

Back

Homeostasis is the organism's ability to maintain steady (stable) internal conditions despite changes in the external environment.

Front

What is a eukaryotic cell?

Back

A eukaryotic cell is a type of cell that has a nucleus and membrane-bound organelles, found in organisms such as plants, animals, and fungi.

Front

What is a prokaryotic cell?

Back

A prokaryotic cell is a type of cell that lacks a nucleus and membrane-bound organelles, typically found in bacteria and archaea.

Front

What is a negative feedback loop?

Back

A negative feedback loop is a process that counteracts changes in a system, preventing small changes from getting larger.

Front

What is a positive feedback loop?

Back

A positive feedback loop is a process where the product (output) of a system amplifies the response, leading to an increase in the output.

Front

List the levels of organization in biological systems from most to least complex.

Back

Organisms -> Organ System -> Organ -> Tissue -> Cell.

Front

What role do cells play in homeostasis?

Back

Cells maintain homeostasis by regulating their internal environment, controlling the movement of substances in and out, and responding to changes.

Front

What is the function of the cell membrane?

Back

The cell membrane controls the movement of substances into and out of the cell, maintaining the internal environment.

Front

What is the significance of feedback mechanisms in biological systems?

Back

Feedback mechanisms are crucial for maintaining homeostasis, allowing organisms to respond to changes and stabilize their internal conditions.

Front

What is an example of a negative feedback mechanism in the human body?

Back

An example is the regulation of body temperature; when the body temperature rises, mechanisms such as sweating are activated to cool it down.