Amoeba Sisters - Inside the Cell Membrane

Front

What is the function of integral proteins in the cell membrane?

Back

Integral proteins facilitate the transport of large molecules, such as glucose, across the cell membrane.

Front

Why is a high surface area to volume ratio beneficial for cells?

Back

A high surface area to volume ratio allows for more efficient exchange of materials with the environment, enhancing cellular function.

Front

What role does cholesterol play in the cell membrane?

Back

Cholesterol helps maintain the fluidity of the cell membrane by preventing phospholipids from becoming too packed or too loose.

Front

What does it mean for a cell membrane to be semi-permeable?

Back

A semi-permeable membrane allows some substances to pass through while blocking others.

Front

What is the structure of phospholipids in the cell membrane?

Back

Phospholipids have a hydrophilic (water-attracting) head and two hydrophobic (water-repelling) tails.

Front

How do hydrophilic and hydrophobic properties affect cell membrane structure?

Back

The hydrophilic heads face outward towards the water inside and outside the cell, while the hydrophobic tails face inward, creating a bilayer.

Front

What is the significance of membrane fluidity?

Back

Membrane fluidity is crucial for the movement of proteins and lipids within the membrane, allowing for proper cell function and communication.

Front

What are peripheral proteins and their function?

Back

Peripheral proteins are attached to the exterior or interior surfaces of the membrane and play roles in signaling and maintaining the cell's shape.

Front

How do channel proteins assist in cellular transport?

Back

Channel proteins provide passageways for specific ions and molecules to cross the membrane, facilitating transport without energy expenditure.

Front

What is the difference between passive and active transport?

Back

Passive transport does not require energy and moves substances down their concentration gradient, while active transport requires energy to move substances against their gradient.