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Life Processes

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Life Processes What are the characteristics of life? LIFE PROCESSES What is a living thing? Imagine that you are space traveler who lands on an unknown planet. – PowerPoint PPT presentation

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Title: Life Processes


1
Life Processes
  • What are the characteristics of life?

2
LIFE PROCESSES
Looking at living things
3
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. Ex. A rock and
    a blade of grass.

4
What are the life processes?
  • NUTRITION
  • TRANSPORT
  • RESPIRATION
  • EXCRETION
  • SYNTHESIS
  • GROWTH
  • REGULATION
  • REPRODUCTION

5
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.

6
Nutrition
  • Includes the activities involved in ingestion
    (obtaining food from the environment) and
    digestion (processing food for use by the
    organism). It also includes egestion (removal of
    solid wastes)

7
Nutrition - Ingestion
8
Nutrition - Digestion
9
Nutrition - Egestion
10
Nutrition Egestion in Leukocytes
  • in which the bacteria, having been ingested and
    enclosed in a digestive vacuole by the leukocyte,
    are ejected by the living cellto the outside

11
Nutrition egestion in mammals
12
TRANSPORT
  • The absorption of materials through cell
    membranes and the circulation, or distribution of
    materials to all the cells of an organism.

13
TRANSPORT
  • Elodea cells
  • Human Circulation

14
RESPIRATION
  • The process of releasing energy from organic
    molecules for use by cells.
  • During respiration glucose is broken down, and
    the energy released is stored in the compound
    ATP.
  • Energy released by the compound ATP is used by
    organisms to perform life functions.

15
RESPIRATION
  • Plants and animals use the oxygen in the air to
    turn food into energy.

16
RESPIRATION
17
RESPIRATION
  • Human Respiratory System

18
EXCRETION
  • The elimination of cellular waste products from
    the organism.
  • These wastes include water, carbon dioxide,
    salts, and nitrogen-containing compounds.

19
EXCRETION
  • Urine Sample

20
SYNTHESIS
  • Chemical reactions in which small molecules
    combine to form larger ones.

21
SYNTHESIS
  • Combining 2 glucose molecules to make a larger
    maltose molecule

22
GROWTH
  • An increase in size brought about by increases in
    cell size and cell number.
  • The raw materials for growth are the products of
    synthesis.

23
GROWTH
24
REGULATION
  • The control and coordination of life functions.

25
REGULATION
  • Nucleus
  • Brain

26
  • All living things respond to changes. Living
    things notice changes in their surroundings and
    react to them.
  • Eg. Plants grow towards the light.
  • Eg. People react to the temperature around them.

27
REPRODUCTION
  • The production of new individuals.
  • Reproduction is necessary for the survival of a
    species, or kind of organism.

28
REPRODUCTION
29
  • LIFE PROCESSES VIDEO
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