Review Flashcard- AP Bio 2.6, 2.7, 2.9 Membrane Transport

Front

What is diffusion?

Back

Diffusion is the passive movement of molecules from an area of higher concentration to an area of lower concentration.

Front

What type of transport involves carrier proteins and transport proteins?

Back

Facilitated Diffusion.

Front

What is active transport?

Back

Active transport is the movement of molecules across a membrane against their concentration gradient, requiring energy (ATP).

Front

What is passive transport?

Back

Passive transport is the movement of molecules across a cell membrane without the use of energy, following the concentration gradient.

Front

What are the main types of membrane transport?

Back

The main types of membrane transport are passive transport (including diffusion and facilitated diffusion) and active transport.

Front

What role do carrier proteins play in facilitated diffusion?

Back

Carrier proteins assist in the transport of specific substances across the cell membrane by changing shape.

Front

What is osmosis?

Back

Osmosis is the diffusion of water across a selectively permeable membrane.

Front

How does concentration gradient affect diffusion?

Back

Molecules move from areas of high concentration to areas of low concentration until equilibrium is reached.

Front

What is the difference between facilitated diffusion and active transport?

Back

Facilitated diffusion does not require energy and moves substances down their concentration gradient, while active transport requires energy to move substances against their gradient.

Front

What is the significance of membrane permeability?

Back

Membrane permeability determines which substances can enter or exit the cell, affecting cellular function and homeostasis.