Facilitated Diffusion vs Active Transport Quiz

What defines osmotic pressure?

Which transport process involves the movement of substances across a biological membrane from an area of higher concentration to an area of lower concentration?

What is the primary characteristic of active transport?

What is the process that involves the diffusion of a solvent through a semi-permeable membrane from an area of low solute concentration to an area of high solute concentration?

Which electrolyte is the chief extracellular cation?

What is the most prevalent anion in extracellular fluid?

Which ion constitutes half of the osmolarity of extracellular fluid?

What is the second most prevalent extracellular anion?

What is the function of amniotic fluid?

Which of the following describes passive transport across a membrane?

What is considered part of membrane transport processes?

Which fluid increases in volume with gestational age?

Osmotic Pressure

Osmotic pressure is the pressure needed to prevent the inward flow of water across a semipermeable membrane.

Passive Transport

Passive transport is the movement of molecules across a cell membrane without energy input from the cell.
Diffusion of a substance across a membrane from a higher concentration to a lower concentration is an example of passive transport.

Active Transport

The defining feature of active transport is that it requires energy to move molecules across a cell membrane.

Osmosis

Osmosis is the diffusion of a solvent, such as water, across a semipermeable membrane from a region of low solute concentration to a region of high solute concentration.

Electrolyte Concentrations

Sodium (Na+) is the primary extracellular cation.
Chloride (Cl-) is the most prevalent anion in extracellular fluid.
Sodium constitutes around half of the osmolarity of extracellular fluid.
Bicarbonate (HCO3-) is the second most prevalent extracellular anion.

Amniotic Fluid

Amniotic fluid helps protect and cushion a developing fetus.

Membrane Transport Processes

Passive transport across a membrane is typically driven by a concentration gradient.
Both passive and active transport processes are considered part of membrane transport processes.

Gestational Age

Amniotic fluid increases in volume with gestational age.

Test your knowledge on facilitated diffusion and active transport across biological membranes. Learn about the movement of substances from areas of higher concentration to lower concentration with carrier proteins, and the process of moving substances against a concentration gradient using energy and specific carrier proteins.