Biology Flashcards
(26 cards)
inventor of 1st primitive telescope
Zacharias Jassen
observed cork cells
Robert Hooke
observed microorganisms
Anton Van Leewenhuek
proposed that cells came from pre existing cells
Rudolf Virchow
proposed that plants are made up of cells
Matthias Schleiden
Proposed that animals are made out of cells
Theodore Schwan
opposed the spontaneous generation theory
Francesco Redi
Functions of the cells
Homeostasis, Chemical Energy, Responses for Changes, Protection and Support
3 principles
Every living cell is composed of 1 or more cells, cells are the basic unit of life, cells come from pre existing cells
primary barrier of the cell
Plasma Membrane
provide support and framework and facilitate motility cells
Cytoskeleton
has a jelly-like structure where all organelles are immersed or suspended
Cytoplasm
has a rigid structure and prevents the cell from bursting
Cell wall
increases the surface area for absorption of nutrients
Microvilli
prevents mucus and dirt from entering the lungs
Cilia
detects sounds from the environment
stereocilia
provides mobility to cells
flagella
these are found at the basement of epithelial cells
Basal Infoldings and Hemidesmosomes
preventing insect attacks, shading leaves, tripping insects (plant cell)
function of trichomes
facilitate the absorption of water (plant cell)
root hairs
responsible for photosynthesis (plant cell)
Mesophyll cells
responsible for transporting essential substances (plant cell)
Xylem and Phloem
responsible for delivering oxygen
red blood cells
responsible for protection from viruses and foreign cells
white blood cells
