Question

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

Explanation:

Passive transport moves particles along a concentration gradient. Osmosis is a type of passive - transport involving water movement along a concentration gradient. Dynamic equilibrium is a state, not a transport process. Active transport is the process that uses energy to move particles against a concentration gradient.

Answer:

active transport