Cell Membrane

Front

What is the primary function of the cell membrane?

Back

To regulate what enters and leaves the cell.

Front

What type of muscle tissue is involuntary and found in the walls of hollow organs?

Back

Smooth muscle.

Front

What role does cholesterol play in the plasma membrane?

Back

To control the effect of temperature changes.

Front

Which type of muscle tissue is considered voluntary?

Back

Skeletal muscle.

Front

What mechanism is typically required to maintain a stable internal environment in the body?

Back

Negative feedback mechanisms.

Front

What are the main components of the cell membrane?

Back

Phospholipids, proteins, cholesterol, and carbohydrates.

Front

How do phospholipids arrange themselves in the cell membrane?

Back

They form a bilayer with hydrophilic heads facing outward and hydrophobic tails facing inward.

Front

What is the fluid mosaic model?

Back

A model that describes the structure of the cell membrane as a mosaic of various proteins that float in or on the fluid lipid bilayer.

Front

What is the significance of membrane proteins?

Back

They assist in transport, act as receptors, and provide structural support.

Front

What is selective permeability in the context of the cell membrane?

Back

The ability of the cell membrane to allow certain substances to pass while blocking others.