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Do Now Write Down Entire Question and
AnswersAll life depends on the availability of
usableenergy. This energy is released when(1)
organisms convert solar energy into thechemical
energy found in food molecules(2) respiration
occurs in the cells of producersand high-energy
molecules enter the atmosphere(3) cells carry
out the process of respiration(4) animal cells
synthesize starch and carbondioxide
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LIFE PROCESSES
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What is a living thing?

• Imagine that you are space traveler who lands on
  an unknown planet. How could you determine if
  what you are looking at is alive.

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What are the life processes?

• NUTRITION
• TRANSPORT
• RESPIRATION
• EXCRETION
• SYNTHESIS
• GROWTH
• REGULATION
• REPRODUCTION

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Key Concepts

• Metabolism all the chemical activities an
  organism must carry on to sustain life.
• Homeostasis the maintenance of a stable
  internal environment in spite of changes in the
  external environment.

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Nutrition

• ingestion - obtaining food from the environment
• digestion (processing food for use by the
  organism).
• egestion (removal of solid wastes)

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Nutrition - Ingestion
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Nutrition - Digestion
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Nutrition - Egestion
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TRANSPORT

• Ability to absorb and circulate materials to the
  cells.
• Oxygen absorbed into the bloodstream
• Oxygen circulated to the cells
• Oxygen absorbed into the cell

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TRANSPORT
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RESPIRATION

• The process of releasing energy
• Glucose (blood sugar) is broken down, and the
  energy released is stored as ATP.
• Energy released by the compound ATP is used to
  perform life functions.

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RESPIRATION

• Plants and animals use the oxygen in the air to
  turn food into energy.

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RESPIRATION
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RESPIRATION

• Human Respiratory System

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EXCRETION

• Removal of cell waste from the organism.
• Exhaling, Urinating, Sweating
• Wastes include water, carbon dioxide, salts, and
  nitrogen.

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EXCRETION
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SYNTHESIS

• small molecules combine to form larger ones.
• Photosynthesis
• CO2 H2O sunlight C6H12O6 O2

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SYNTHESIS

• Combining 2 glucose molecules to make a larger
  maltose molecule

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GROWTH

• An increase in size
• increases in cell size
• Increase in cell number.
• The raw materials for growth are the products of
  synthesis.

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GROWTH
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REGULATION

• The control and coordination of life functions.

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REGULATION

• Nucleus

• Brain

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Stimuli

• All living things respond to changes.
• Eg. Plants grow towards the light.
• Eg. People react to the temperature around them.

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REPRODUCTION

• The production of new individuals.
• Necessary for the survival of a species.
• Not necessary for the survival of the individual

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REPRODUCTION
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