Cell Homeostasis and Organization

Front

What is cell homeostasis?

Back

Cell homeostasis is the process by which cells maintain a stable internal environment despite changes in external conditions.

Front

What role does the cell membrane play in homeostasis?

Back

The cell membrane regulates the transport of substances in and out of the cell, helping to maintain homeostasis.

Front

What is epinephrine?

Back

Epinephrine is a hormone that acts as a signal molecule between cells, particularly in response to stress.

Front

What is a receptor in the context of cell signaling?

Back

A receptor is a protein molecule on the cell surface that binds to specific signal molecules, allowing the cell to respond to external signals.

Front

What is a ligand?

Back

A ligand is a molecule that binds to a receptor to initiate a cellular response.

Front

What does it mean for a solution to be isotonic?

Back

An isotonic solution has equal concentrations of solutes inside and outside the cell, resulting in no net movement of water.

Front

What happens to a cell in a hypertonic solution?

Back

In a hypertonic solution, water moves out of the cell, causing it to shrink.

Front

What is the function of proteins in the cell membrane?

Back

Proteins in the cell membrane assist in transport, act as receptors, and provide structural support.

Front

What is diffusion?

Back

Diffusion is the movement of molecules from an area of higher concentration to an area of lower concentration.

Front

What is osmosis?

Back

Osmosis is the diffusion of water across a selectively permeable membrane.