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“Living” Vs. “Nonliving”
What makes something “alive”?
Biology
Bios + logos
“Life” “Study”
Biology – study of living things, or, organisms.
Life Functions 8 life functions/processes that classify
something as “living”, or an organism:
1. Digestion 5. Excretion
2. Circulation 6. Coordination
3. Movement 7. Reproduction
4. Respiration 8. Immunity
1. Digestion Breaking down large food molecules to smaller
molecules.
- small molecules can enter cells.
ex: glucose
2. Circulation Transport of materials within an organism.
- brings glucose and oxygen to cells (mailman).
- takes away wastes and carbon dioxide from cells. (garbage man)
3. Movement Voluntary change in position of organism.
- muscular and skeletal systems work together.
4. Respiration Uses oxygen to change glucose into energy (ATP).
5. Excretion “Ex” = out!
Removal of waste products!
- sweat, urine, carbon dioxide
6. Coordination Nervous system and endocrine system send
chemical messages throughout the body.
- hormones are chemical messages.
7. Reproduction Ability of an organism to make more of its own
kind.- necessary for survival of species.
Sexual Reproduction – involves two parents. Asexual Reproduction – involves one parent.
8. Immunity Ability of an organism to fight disease and
foreign invaders.
- produce antibodies and white blood cells.
Homeostasis All life processes work together in order to ensure
maintenance of homeostasis. Homeostasis – an organism’s ability to keep a
stable internal environment (steady-state).
- any change in a life process = bad for homeostasis.
- organisms have control mechanisms to help maintain homeostasis.
Example of Control Mechanism
1. Temp. rises 2. Sweating 3. Cools body back down to
normal temp (98.6).