It’s Alive!!! Or Is It?It’s Alive!!! Or Is It?

By: Mr. HunterBy: Mr. Hunter

What do you think?What do you think?

Living or non-living?Living or non-living?

ALL LIVING ALL LIVING THINGS…THINGS…

1. …are made of cells.1. …are made of cells. 2. …sense and respond to change.2. …sense and respond to change. 3. …reproduce sexually or asexually.3. …reproduce sexually or asexually. 4. …have DNA.4. …have DNA. 5. …use energy.5. …use energy. 6. …grow and develop.6. …grow and develop.

CellsCells

Cell:Cell: the smallest unit that can the smallest unit that can perform all life processesperform all life processes

CellsCells are covered by a membrane are covered by a membrane and have DNA and cytoplasmand have DNA and cytoplasm

Organisms may be multi-cellular or Organisms may be multi-cellular or uni-cellular.uni-cellular.

CellsCells

Sensing and Responding To Sensing and Responding To ChangeChange

Stimulus: Stimulus: anything that causes a anything that causes a reaction or change in an organism or reaction or change in an organism or any part of an organismany part of an organism

StimuliStimuli

ChemicalsChemicals GravityGravity LightLight SoundSound HungerHunger TouchTouch

StimuliStimuli

What are some examples of stimuli What are some examples of stimuli that you encounter in your everyday that you encounter in your everyday life? life?

How do you respond to each How do you respond to each stimulus?stimulus?

HomeostasisHomeostasis

Homeostasis: Homeostasis: the maintenance of a the maintenance of a constant internal state in a changing constant internal state in a changing environmentenvironment

How does your body maintain How does your body maintain homeostasis when you are extremely homeostasis when you are extremely cold? How does your body maintain cold? How does your body maintain homeostasis when you are extremely homeostasis when you are extremely hot?hot?

ReproductionReproduction

Compare/contrast Compare/contrast sexual and asexual sexual and asexual reproduction.reproduction.

Binary fission is an Binary fission is an example of asexual example of asexual reproduction.reproduction.

ReproductionReproduction

Sexual reproductionSexual reproduction

DNADNA

Deoxyribonucleic acidDeoxyribonucleic acid

Controls the structure and Controls the structure and function of cellsfunction of cells

Organisms pass copies of their Organisms pass copies of their DNA to their offspring (heredity)DNA to their offspring (heredity)

DNADNA

EnergyEnergy

Metabolism: Metabolism: the total of all of the the total of all of the chemical activities that the organism chemical activities that the organism performsperforms

Living ThingsLiving Things

Living things grow and developLiving things grow and develop

So…. Let’s analyze some So…. Let’s analyze some examples….examples….

1. …are made of cells.1. …are made of cells. 2. …sense and respond to change.2. …sense and respond to change. 3. …reproduce sexually or asexually.3. …reproduce sexually or asexually. 4. …have DNA.4. …have DNA. 5. …use energy.5. …use energy. 6. …grow and develop.6. …grow and develop.

Key TermsKey Terms

HabitatHabitat ProducersProducers ConsumersConsumers DecomposersDecomposers PhotosynthesisPhotosynthesis Amino acidsAmino acids ProteinsProteins CarbohydratesCarbohydrates LipidsLipids PhospholipidsPhospholipids Adenosine TriphosphateAdenosine Triphosphate Amino acidsAmino acids

Chemical Building Blocks of Chemical Building Blocks of CellsCells

ProteinsProteins CarbohydratesCarbohydrates LipidsLipids ATPATP Nucleic AcidsNucleic Acids

ProteinsProteins

Proteins Proteins supply the body with the supply the body with the building blocks needed to repair building blocks needed to repair tissues.tissues.

Simple/Complex Simple/Complex CarbohydratesCarbohydrates

Simple/Complex CarbsSimple/Complex Carbs

LipidsLipids

Lipids store energy and make up cell Lipids store energy and make up cell membranes.membranes.

The cell membrane is a phospholipid The cell membrane is a phospholipid bilayer. bilayer.

GeneralizationsGeneralizations

What can you conclude about the What can you conclude about the fluid surrounding the cell membrane?fluid surrounding the cell membrane?

ATPATP

Adenosine triphosphate is the major Adenosine triphosphate is the major energy carrying molecule in the cellenergy carrying molecule in the cell

Nucleic AcidsNucleic Acids

Nucleic acids have the information Nucleic acids have the information cells need to make proteinscells need to make proteins