Movement Across The Cell Membrane: Trivia Quiz!

Explanation
Diffusion is the process by which molecules or particles move from an area of higher concentration to an area of lower concentration. This movement occurs due to the random motion of particles, which leads to a net movement from areas of high concentration to areas of low concentration until equilibrium is reached. In diffusion, there is no need for external energy input as it is a passive process driven by the concentration gradient.

Explanation
The sodium pump is an example of active transport because it requires the use of energy to move sodium ions against their concentration gradient from inside the cell to the extracellular fluid. This process is essential for maintaining the proper balance of sodium ions inside and outside the cell, as well as for generating the electrical potential across the cell membrane.

Explanation
Facilitated diffusion refers to the process in which a carrier protein assists in the movement of molecules across a membrane from an area of higher concentration to an area of lower concentration. This type of transport does not require energy and is driven by the concentration gradient. The carrier protein acts as a channel or a transporter, allowing specific molecules to pass through the membrane. This process is important for the transportation of larger or charged molecules that cannot easily diffuse through the lipid bilayer of the membrane.

Explanation
Filtration is the process that uses hydrostatic pressure to transfer water and solutes through a membrane from an area of higher pressure to lower pressure. This process is commonly used in various applications such as water purification, kidney function, and industrial filtration systems. By applying pressure, the liquid is forced through the membrane, leaving behind larger particles and allowing only smaller molecules to pass through. This allows for the separation and purification of substances based on their size and solubility.