Active Transport

During active transport, substances are moved from ______ concentration to _____ concentration.

• low , high

• high , low

Active transport moves substances _______ the concentration gradient.

• down/with

• up/against

Active transport requires energy in the form of ____.

• NFL

• ATP

• DNA

• BMV

______ are embedded in the cell membrane and are used to move substances during active transport.

• Carbohydrates

• Cholesterol

• Nucleotides

• Proteins

Why does the "climbing a ladder" analogy work to describe active transport?

• Cells often climb ladders to reach higher vantage points.

• DNA looks like a ladder and all cells have DNA.

• Climbing a ladder takes energy, and so does active transport.

• Climbing a ladder is effortless and takes no energy, just like active transport.