Life processes

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    28-May-2015

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  • 1. Notes: Life processes and Homeostasis (pg 4)

2. Baby Girl! 3. Life processes 1. Maintaining boundaries a. Every cell is surrounded by a membrane b. The body is surrounded by skin 4. Life processes 1. Maintaining boundaries a. Every cell is surrounded by a membrane b. The body is surrounded by skin 2. Metabolism: Chemical reactions within body cells a. Catabolism: Destructive. Food Nutrients b. Anabolism: Constructive. Nutrients Muscle 5. Life processes 1.Boundaries 2. Metabolism a. Catabolism: Destructive. Food Nutrients b. Anabolism: Constructive. Nutrients Muscle 3. Responsiveness (Irritability): Ability to respond to a stimulus 6. Life processes 1. Boundaries 2. Metabolism a. Catabolism: Destructive. Food Nutrients b. Anabolism: Constructive. Nutrients Muscle 3. Responsiveness (Irritability): Ability to respond to a stimulus 4. Movement: Includes movement of the whole body (walking, running), parts of the body, and movement within the body (blood flowing through blood vessels, food through the digestive system, etc.) 7. Life processes 1. Boundaries 2. Metabolism 3. Responsiveness (Irritability): Ability to respond to a stimulus 4. Movement: Includes movement of the whole body (walking, running), parts of the body, and movement within the body (blood flowing through blood vessels, food through the digestive system, etc.) 5. Reproduction: a. Cellular level- for growth and repair and replacement of old cells. b. Organism level-formation of a new individual 8. Life processes 6. Growth: Increase in size either through increased # of cells or size of cells 9. Life processes 6. Growth: Increase in size either through increased # of cells or size of cells 7. Differentiation: Unspecialized cells develop into specialized cells with distinctive structural and functional characteristics 10. Life processes 6. Growth: Increase in size either through increased # of cells or size of cells 7. Differentiation: Unspecialized cells develop into specialized cells with distinctive structural and functional characteristics 8. Respiration: Cellular- breakdown of sugar into CO2 using O2 Organism- exchange of CO2and O2 in lungs 11. Life processes 6. Growth: Increase in size either through increased # of cells or size of cells 7. Differentiation: Unspecialized cells develop into specialized cells with distinctive structural and functional characteristics 8. Respiration: Cellular- breakdown of sugar into CO2 using O2 Organism- exchange of CO2and O2in lungs 9. Digestion: Breaking down food into nutrients usable by the body 12. Life processes 6. Growth: Increase in size either through increased # of cells or size of cells 7. Differentiation: Unspecialized cells develop into specialized cells with distinctive structural and functional characteristics 8. Respiration: Cellular- breakdown of sugar into CO2 using O2 Organism- exchange of CO2 and O2 9. Digestion: Breaking down food into nutrients usable by the body 10. Excretion: Removal of non-usable waste and by- products of metabolism 13. Output (pg 5) Design an alien 14. Homeostasis (pg 4) Constant internal environment that must be maintained in the body Usually accomplished by negative feedback 15. Example: Thermostat 16. Body Temperature 17. Positive Feedback Occurs when the output of a system stimulates further increase in output Does not maintain homeostasis