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Life Processes
How do we know if
something is alive?
• The 8 characteristics of life.
– (SEE ABOVE)
• Now that we know what is living,
what must organisms do to stay
alive?
– (SEE PAGE 15)
• Life ProcessesAny activity or
function that is
necessary in
order for life to
continue.
Synthesis
• Creation of substances such as sugar and
protein within the body that are essential for
life
• Photosynthesis, protein synthesis
Transport
• The movement
of substances
within the
organism
• Passive, active,
circulation
Excretion
• Release of waste products from metabolism into the
environment
• Contractile vacuoles, excretory system, respiratory
system, biogeochemical cycles
Regulation
• Maintaining internal balance, such as temperature and
water
• Homeostasis, water balance, endocrine system, nervous
system, excretory system
Nutrition
• Obtaining food from
the external
environment for
growth and
development
• Photosynthesis, food
webs, digestive
systems,
predator/prey
relationships
Growth
• Increase in cell
size, or divide
cells again and
again
• Development,
metamorphosis,
cell size – reason
for dividing
Reproduction
• Production of new organism from two parents
(sexually) or from a single parent (asexually)
• Sexual/asexual, mitosis, meiosis, reproductive
system
Respiration
• The use of oxygen to convert food into
energy
• Cell respiration, carbon cycle,
respiratory system
STERNGRR
• A quick acronym for the life
processes.