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PCS LIv Env. Review
Bottom Line Review #2 - Homeostasis
| Term | Definition |
|---|---|
| photosynthesis | stores energy, made by autotrophs, uses solar energy , occurs in chloroplasts |
| cell respiration | releases energy (ATP), occurs in mitochondria |
| enzymes | catalyst made of protein that speeds up reactions, are reused |
| functions of enzymes | break down - digestive build up - helps ribosomes bond amino acids together speed up reactions like respiration and photosynthesis |
| Enzymes work best at | 98.6 F. and neutral "ph" |
| negative feedback | makes the amount needed then stops: thermostat, body temperature |
| positive feedback | the more the stimulus, the more it works: uterus contractions at birth |
| pathogens | foreign invaders into the body, ex: bacteria, virus, fungus, parasites |
| causes of disease | pathogens, abnormal body cells, inherited disorders, poor nutrition, high-risk behaviors |
| cancer | mutations result in uncontrolled cell division such as a tumor |
| antigens | molecules on the outer surface of cells, the way the body can recognize "self" and "non-self" cells |
| White blood cells | phagocytes surround and engulf pathogens lymphocytes produce antibodies-kills cells- Y shaped |
| Vaccines | weak pathogen that causes the immune system to form antibodies |
| Allergies | immune response reacts to normally harmless substances by releasing histamines |
| histamines | chemicals from your body that cause rashes, itching and swelling |
| Organic transplant rejections | immune system attacks non-self antigens on transplanted organs |
| HIV | weakens immune system causing AIDs |
Created by:
cboula
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