LIFE FUNCTIONS
•Meet Mr. Stranger!
•You will learn the 10 life functions and their definitions.
Life Functions
Life functions are needed to keep a stable or constant environment with in a living thing.
Metabolism• All of the chemical activities
happening in your body.
Respiration
• Turning food into energy
Respiration: releases the chemical energy stored in nutrients.
Synthesis• Turning the raw materials from your food into
needed materials.
– Simple substances are combined To form complex substance
This is Synthesis
Transport• Moving and
distributing materials throughout the body.
Reproduction• Making more of your own
species.
Reproduction: 2 Types:
Sexual Reproduction:
2 parents make a unique individual.
*1/2 genes from mom
*½ genes from dad
• Asexual reproduction requires one parent cell and offspring are identical to the original.
Absorption
• Incorporating the materials from your
food into your body parts (in order to grow
or heal).
Nutrition
Obtaining
raw
materials
for….
Heterotrophic Autotrophic
• Ingestion =eat
• Digestion =break down
• Egestion =GET RID OF Feces(POOP)
2 Types
Photosynthesis
SUN FOOD
Heterotroph or Autotroph?
Heterotroph or Autotroph?
Growth• To get larger
(using raw materials to make a larger body).
Excretion• Expelling toxic wastes from the body.
CO2, URINE, SWEAT
Carbon Dioxide
Urea
Regulation
Time
Bo
dy
Te
mp
eratu
re
• Maintaining Homeostasis
an internal balance.
37
Danger Zone
Danger Zone
Time
TE
MP
ER
AT
UR
E
Regulation– Staying out of danger (reflexes)
– Constant body temperature (Nervous system)
– Constant water level (Excretory system)
– Constant blood sugar level (Endocrine System)
– Constant blood pressure (Nervous System)
Time
Blo
od S
ug
ar
Which Life Function Is It?
TransportRegulation
Excretion
Nutrition
Excretion
Reproduction
SynthesisNutrition
The body temperature of a runner increases. The runner responds by perspiring, which lowers body temperature. This process is an example of….
1. maintenance of homeostasis
2. transport
3. locomotion
4. reproduction
If a human system fails to function properly, what is the most likely result?
1. a stable rate of metabolism
2. a disturbance in homeostasis
3. a change in the method of respiration
4. a change in the DNA
Which life process is classified as autotrophic in some organisms and heterotrophic in other organisms?
1. hormonal regulation
2. nutrition
3. anaerobic respiration
4. transport
When an individual goes without eating for a day, his or her blood sugar level remains about the same throughout the day. This relatively constant condition is maintained by……
1. regulation
2. egestion
3. reproduction
4. growth of cells
Describe the difference:
• Sexual and Asexual
• Autotrophic and Heterotrophic