Question

which homeostatic process moves particles against a concentration gradient?
passive transport
active transport
dynamic equilibrium
osmosis

Explanation:

To determine the homeostatic process that moves particles against a concentration gradient, we analyze each option:

• Passive transport (including osmosis, a type of passive transport) moves particles along the concentration gradient (from high to low concentration) and does not require energy.
• Dynamic equilibrium is a state where the rate of movement of particles is equal in both directions, not a process that moves particles against a gradient.
• Active transport is the process that requires energy (e.g., ATP) to move particles from an area of low concentration to an area of high concentration, i.e., against the concentration gradient.

Answer:

active transport