Topic 2 LE Vocabulary

proteins that speed up the rate of

chemical reactions in living things

• antibodies

• antigens

• enzymes

• chlorophyll

the ability of an organism to maintain a

stable internal environment even when

the external environment changes

• synthesis

• respiration

• photosynthesis

• homeostasis

a chemical process that occurs in a

living thing

• biochemical process

• immunity

• growth

green organelles that contain

chlorophyll; where photosynthesis

takes place

• mitochondria

• chloroplast

• ribosomes

• nucleus

a sugar that is a major source of energy

for cells

• glucose

• protein

• lipids

• amino acids

the process by which the chemical

bond energy stored in nutrients is

released for use in cells

• photosynthesis

• respiration

• homeostasis

• synthesis

a life process that involves combining

simple substances into more complex

substances

• excretion

• respiration

• synthesis

• digestion

(adenine triphosphate) a compound that

stores energy in cells

• ATP

• antibody

• antigen

• oxygen

the process of obtaining oxygen from

the environment and releasing carbon

dioxide

• ATP

• digestion

• excretion

• gas exchange

the process by which some organisms

are able to capture light energy and use

it to make food from carbon dioxide

and water

• respiration

• photosynthesis

• excretion

• digestion