Which statement best describes active transport across the plasma membrane?Movement of molecules from an area of higher concentration to an area of lower concentration, requiring energyMovement of molecules from an area of lower concentration to an area of higher concentration, requiring energyMovement of molecules from an area of higher concentration to an area of lower concentration, not requiring energyMovement of molecules from an area of lower concentration to an area of higher concentration, not requiring energy

How do molecules move that are facilitated by active transport?lower concentration to higher concentrationthrough the cell membranehigher concentration to lower concentration

A process that requires cellular energy to move a substance against its concentration gradient is called:Question 16Select one:a.active transport.b.passive transportc.facilitated transport.d.osmosis.e.diffusion.

Active transport is the net (overall) movement of particles from an area of high concentration to an area of lower concentration.Question 13Answera.Trueb.False

Which of the following statements correctly describes a characteristic of active transport?Question 1Answera.Active transport involves the movement of molecules down their concentration gradient. b.Active transport moves molecules against their concentration gradient.c.Active transport is responsible for the passive diffusion of oxygen and carbon dioxide across the cell membrane.d.Active transport only occurs in prokaryotic cells and is absent in eukaryotic cells.

The movement of substances from lower to higher concentration across a semi-permeable membrane that must have a specific protein carrier and use energy is called: A. facilitated diffusion. B. diffusion. C. active transport. D. osmosis. E. endocytosis.