| A | B |
|---|
| AIDS | the disease that results when the HIV virus attacks the immune system |
| allergy | condition in which a persons immune system is overly sensitive to environmental substances that are normally harmless |
| antibodies | proteins that either attack invading pathogens or mark them for killing |
| antigen | molecule that the immune system recognizes as either part of the body or an outside invader |
| ATP | a compund that stores energy in a cell |
| bacteria | a single-celled organism without a nucleus |
| biochemical process | a chemical process that occurs in a living thing |
| catalyst | substance that speeds up a chemical reaction |
| cellular respiration | process by which nutrients are broken apart, releasing the chemical energy stored in them |
| chloroplast | place of photosynthesis |
| disease | condition, other than an injury, that prevents the body from working as it should |
| dynamic equilibrium | constant adjustments needed to keep the organism's internal environment witin the normal limits needed for survival |
| enzyme | speeds up the rate of chemical reactions in living things |
| feedback mechanism | cycle in which the output of a system either modifies or reinforces the first action taken by the system |
| fungi | multicellular, heterotrophic |
| gas exchange | process of obtaining oxygen from the environment and releasing carbon dioxide |
| glucose | sugar that is the major source of energy for cells |
| guard cells | specialized cells that control the opening and closing of pores on the surface of a leaf |
| homeostasis | internal balance |
| immune system | the body's primary defense against disease-carrying pathogens |
| insulin | hormonr that promotes glucose to move from the blood into body cells, resulting in lower glucose levels in the blood |
| microbe | microscopic organism |
| mitochondria | ENERGY from nutrients |
| pancreas | endocrine organ that secretes insulin |
| parasite | orgainsm that survives by living and feeding on another organism |
| pathogen | disease causing organism |
| ph | measure of whether a substance is acidic, neutral or basic |
| photosynthesis | organisms ability to capture light energy and use it to make food from carbon dioxide and water |
| respiration | process when chemical bond energy stored in nutrients is released for use in the cells |
| stimuli | any change in the environment that causes an organism to react |
| synthesis | life process tha involves combing simple substances into more complex substances |
| vaccine | a weakened pathogen designed to protect the body from future invasions of that pathogen |
| virus | a non living particleof protein and genetic material that reproduces by invading the cell of a living organism |
