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body structure
| Term | Definition |
|---|---|
| anatomy | Study of the structure of the body. |
| physiology | Study of the function of the body. |
| pathophysiology | Defined as the study of diseases and disorders.. Helps explain how normal body functions are altered by illness. |
| homeostasis | Refers to the balance of body systems working together. |
| atoms | are the most basic level of organization in the human body. every atom contains a proton, neutron, and electron |
| molecules | Combinations of two or more atoms forming chemical compounds., exp: sugars, proteins, water |
| cells | Basic units of life. They are considered the building blocks of the human body. |
| organelles | are structures within the cytoplasm, Each has a specific function vital to cell health |
| chromosomes | a thread-like body in a cell nucleus that contains genetic information body has 23 pairs of chromosomes |
| deoxyribonucleic acid (DNA) | the genetic compound of the cell, makes up the genes is mandatory for cellular reproduction |
| ribonucleic acid (RNA) | an organic compound involved in the manufacture of proteins within cells which are chemically related to DNA |
| meiosis | cell division of reproductives cells male-Each gamete is a sperm cell. female-Each gamete is an ovum (egg). |
| organs | Structures composed of multiple tissue types. |
| passive transport | No energy required from the cell. Moves substances from high to low concentration. |
| diffusion | movement of particles until evenly distributed. Grater to lesser |
| osmosis | movement of water through a membrane. Greater to lesser |
| filtration | uses pressure to move particles through membranes. |
| active transport | Requires cellular energy (ATP). Moves substances from low to high concentration. Helps cells absorb needed materials from tissue fluid. |
| phagocytosis | cell engulfs solid particles (e.g., bacteria). |
| pinocytosis | cell absorbs fluid ("cell drinking"). |
| anabolism | a process of chemical reactions that work together to build things up, such as creating molecules from smaller components. requires energy to complete task |
| catabolism | a chemical process that works to break down larger units into smaller units, such as digestion releases energy during its process |
| proton | positively charged |
| neutron | without an electron charge |
| electron | negatively charged |
| metablism | the sum of all physical and chemical reactions that occur within an organism |
| adenosine triphosphate (ATP) | they energy compound of the cell that stores energy needed for cell activities |
| proteins | category of organic compounds that includes structural materials, enzymes, and some hormones |
| enzymes | an organic substance that speeds the rate of chemical reaction |
| carbohydrates | the category of organic compounds that includes sugar and starches |
| glucose | a simple sugar that circulates in the blood, the main energy for metabolism |
| lipids | a category of organic compounds that includes fats |
| genes | control the formation of protein within cells, most particularly enzymes, the catalysts needed to speed the rate of metabolic reaction |
| cytosol | fluid portion of the cytoplasm, surrounds the organelles |
| microvilli | short extensions of the cell membrane, absorb materials into the cell |
| electrolytes | are molecules that conduct electricity in the body. Electrolytes help transmit electrical impulses between cells. |
| cations | positively charged ions (e.g., sodium, potassium). |
| anions | negatively charged ions (e.g., chloride, bicarbonate). |
| soild | molecules are closest together, moving slowly. |
| liquids | molecules are moderately spaced, moving freely. |
| Gases | molecules are farthest apart, moving rapidly. |
| mRNA | Messager |
| tRNA | transfer |