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Functions of life
week 1
| Term | Definition |
|---|---|
| metabolism | the sum of all anabolic and catabolic reactions that take place in the body. |
| anabolism | process whereby smaller, simpler molecules are combined into larger, more complex substances. |
| catabolism | process by which larger more complex substances are broken down into smaller simpler molecules. |
| adenosine triphosphate (ATP | organic compound that provides energy to drive many processes in living cells (muscle contraction, nerve impulse propagation, and chemical synthesis.) |
| movement | includes actions at the joints of the body, as well as the motion of individual organs and even individual cells. |
| developement | all of the changes the body goes through in life. |
| growth | the increase in body size. |
| reproduction | the formation of a new organism from parent organisms. |
| oxygen | makes up 20% of atmospheric air and is a key component of the chemical reactions that keep the body alive, including the reactions that produce ATP. |
| nutrient | a substance in foods and beverages that is essential to human survival. |
| water | makes up 70% of an adult's body mass, the most vital of all nutrients. |
| hypothermia | the clinical term for an abnormally low body temperature |
| blood pressure | exerted by blood as it flows within blood vessels. |
| disease | a particular abnormal condition that negatively affects the structure or function of all or part of an organism, and that is not due to any immediate external injury. |
| homeostasis | the state of steady internal, physical, and chemical conditions maintained by living systems, the condition of optimal functioning for an organism. |
| stimulus | a thing or event that evokes a specific functional reaction in an organ or tissue. |
| glucose | a simple sugar which is an important energy source in living organisms and is a component of many carbohydrates. |
| insulin | a hormone produced in the pancreas by the islets of Langerhans, which regulates the amount of glucose in the blood. |
| hormone | a regulatory substance produced in an organism and transported in tissue fluids such as blood to stimulate specific cells or tissues into action. |
| thyroid gland | a small, butterfly-shaped gland located at the base of your neck just below the Adam's apple and is part of the endocrine system. |
| adrenal gland | (also known as suprarenal glands) endocrine glands that produce a variety of hormones including adrenaline and the steroids aldosterone and cortisol. |