Chapter 2 - Movement of Substances

aerobic respiration

Since energy is required, amount of mitochondria to carry out ________ and availability of oxygen is important.

diffusion

the process in which there is movement of a substance from an area of high concentration of that substance to an area of lower concentration

Active transport

the process where energy is used to move substances, across a cell membrane, from a region of lower concentration to a region of higher concentration, against concentration gradient.

Plasma membrane

________ or visking tubing are examples of partially permeable membranes that only allow allow some substances such as water, gases like oxygen and carbon dioxide to pass through freely but not some other substances.

Concentration gradient

the difference in concentration between two regions.

Active transport

The process which requires energy

Osmosis

the movement of water molecule from a region of high concentration to a region of lower concentration down the water potential gradient.