321 Cell Membrane and Transport Flashcard Kanya 2024

Front

What happens to a cell placed in a hypertonic solution?

Back

Water moves from the inside of the cell to the solution.

Front

Which process includes all others: Facilitated diffusion, Osmosis, Passive transport, or Diffusion of a solute across a membrane?

Back

Passive transport.

Front

What is the difference between active and passive transport?

Back

Active transport uses ATP (energy) while passive transport does not need energy.

Front

What component strengthens and stabilizes the cell membrane?

Back

Cholesterol.

Front

In the plasma membrane, which part is oriented toward the external environment and which part is oriented toward each other?

Back

Hydrophilic phosphate group head is oriented toward the external; hydrophobic fatty acid tails are oriented toward each other.

Front

Define osmosis.

Back

The movement of water across a selectively permeable membrane from an area of lower solute concentration to an area of higher solute concentration.

Front

What is facilitated diffusion?

Back

A process that allows substances to cross membranes with the assistance of special proteins.

Front

What is the role of phospholipids in the cell membrane?

Back

They form the basic structure of the cell membrane, creating a bilayer.

Front

What is the function of transport proteins?

Back

They help move substances across the cell membrane.

Front

What is the significance of the fluid mosaic model?

Back

It describes the structure of the cell membrane as a mosaic of various components that move freely.