Notes: Life processes and
Homeostasis (pg 4)
Baby Girl!
Life processes
1. Maintaining boundaries
a. Every cell is surrounded by a membrane
b. The body is surrounded by skin
Life processes
1. Maintaining boundaries
a. Every cell is surrounded by a membrane
b. The body is surrounded by skin
2. Me...
Life processes
1.Boundaries
2. Metabolism
a. Catabolism: Destructive. Food → Nutrients
b. Anabolism: Constructive. Nutrien...
Life processes
1. Boundaries
2. Metabolism
a. Catabolism: Destructive. Food → Nutrients
b. Anabolism: Constructive. Nutrie...
Life processes
1. Boundaries
2. Metabolism
3. Responsiveness (Irritability): Ability to respond to a
stimulus
4. Movement:...
Life processes
6. Growth: Increase in size either through increased #
of cells or size of cells
Life processes
6. Growth: Increase in size either through increased #
of cells or size of cells
7. Differentiation: Unspec...
Life processes
6. Growth: Increase in size either through increased #
of cells or size of cells
7. Differentiation: Unspec...
Life processes
6. Growth: Increase in size either through increased #
of cells or size of cells
7. Differentiation: Unspec...
Life processes
6. Growth: Increase in size either through increased #
of cells or size of cells
7. Differentiation: Unspec...
Output (pg 5)
• Design an alien
Homeostasis (pg 4)
• Constant internal environment that must be
maintained in the body
• Usually accomplished by negative ...
Example: Thermostat
Body Temperature
Positive Feedback
• Occurs when the output of a system
stimulates further increase in output
• Does not maintain homeostas...
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Life processes

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Life processes

  1. 1. Notes: Life processes and Homeostasis (pg 4)
  2. 2. Baby Girl!
  3. 3. Life processes 1. Maintaining boundaries a. Every cell is surrounded by a membrane b. The body is surrounded by skin
  4. 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. 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. 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. 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. 8. Life processes 6. Growth: Increase in size either through increased # of cells or size of cells
  9. 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. 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. 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. 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. 13. Output (pg 5) • Design an alien
  14. 14. Homeostasis (pg 4) • Constant internal environment that must be maintained in the body • Usually accomplished by negative feedback
  15. 15. Example: Thermostat
  16. 16. Body Temperature
  17. 17. Positive Feedback • Occurs when the output of a system stimulates further increase in output • Does not maintain homeostasis

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