Life and Cell intro Quiz Flashcards
Homeostasis
the ability to maintain constant internal conditions-37C
Stimulus Response
anything in the environment that causes an organism to react
Sexual reproduction
process of making offspring requiring 2 organisms to mate
Asexual reproduction
process of making offspring where 1 organism splits into 2
Adaptation
a trait that allows an organism to better survive in its environment
Energy
ability to get work done
Producer
an organism that makes its own food like plants using photosynthesis
Consumer
organism that obtains food by eating producers or other life forms
Development
progressive changes in size, shape, and function during the life of an organism
Excretion
process of removing waste from your body (urination, exhalation)
unicellular
a single celled life form (bacteria)
multicellular
many celled
prokaryote
smaller & simpler, no nucleus, or organelles, ex. bacteria
eukaryote
larger & more complex, have nucleus, have many types of organelles, 2 types: animal & plant
compound light microscope
Common lab microscope, 3000x, light, 2D, sees living cells
stereo microscope
dissecting microscope, 500x, light, 3D, magnifies surfaces of living things
TEM
Transmission EM, 300,000x , electrons, 2D, interior of cells, Kills!
SEM
Scanning EM, 100,000x , electrons, 3D, surfaces of cells, Kills!
limit of resolution
the point at which the ability to distinguish between objects blurs/is lost, sharpness. Problem with light microscopes
magnification
the action or process of magnifying something or being magnified, esp. visually.
cell culturing
growing cells outside of the body in a petri dish
micrometer
one thousandths of a millimeter.
a blood cell in 10 µm in size
microtome
tool that slices specimens for microscope viewing
centrifuge
a tool used separate material by spinning them
Cell theory
All life is made of cells
A cell is basic unit of life
All cells come from cells
Robert Hooke
first to observe “small chambers” in cork and call them cells.
Anton von Leeuwenhoek
first to observe microorganisms
Matthias Schleiden
discovered that plants are made of cells
Theodor Schwann
discovered that animals are made of cells.
Rudolf Virchow
all cells come from cells
