| A | B |
|---|
| homeostasis | The internal stability that living things maintain |
| dynamic equilibrium | Another name for homeostasis |
| Photosynthesis | plants convert sunlight into stored energy |
| Respiration | stored chemical energy is released for use in cells, requires oxygen |
| sun | All the energy that supports life on Earth comes from here |
| chloroplasts | special green-colored organelles where photosynthesis occurs |
| glucose | the end product of photosynthesis |
| ATP | energy that keeps all living things alive and powers all life functions, product of cellular respiration |
| Synthesis | glucose molecules are combined to form more complex substances (starch, glycogen) |
| enzymes | special proteins that speed up chamical reactions |
| mitochondria | where cellular respiration occurs |
| catalyst | any substance that speeds up a chemical reaction |
| Positive Feedback | change prompts a response, which leads to a greater change and greater response |
| Negative Feedback | change is detected, actions are taken to restore homeostasis |
| insulin | secreted to lower blood sugar levels |
| pancreas | secretes insulin to regulate blood sugar levels |
| guard cells | open or close stomata to regulate water loss |
| Diseases | conditions that prevent the body from functioning properly |
| pathogens | foreign invaders in the body |
| cancer | rapid, uncontrolled cell division |
| tumor | mass of abnormal cells |
| immune system | the body’s defense mechanism against disease-causing pathogens |
| antibodies | Y-shaped proteins that either attack the invaders or mark them for killing |
| Vaccines | weakened or killed pathogens that, when injected, stimulate the immune system to produce antibodies |
| Allergies | rapid immune responses to environmental substances |
