physio cells and tissues
Terms
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- what is a cell
- basic functional unit of most living organisms
- how many difft types of cells in human body
- >200
- diff between cytology and cell biology
- cytology - anatomy of cell. cell bio = physiology of cell.
- what's a zygote
- fertilized ovum (egg)
- does each cell have different dna?
- no, exactly the same. during differentiation, only select genes are activated depending on it's intended function.
- cell as medieval walled city
- wall = plasmalemma. gates = protein. ruler (internal and intercellular)= DNA. foreign invaders = pathogens. food & supplies = external environment.
- cells are surrounded by _________, which is used for _________
- ECF (dilute salt solution;) transmit nutrients, wastes, chemical communications
- cell divided into 3 main components:
- cell membrane, nucleus and cytoplasm
- cytoplam fluid portion; cytoplam structures
- cytosol; organelles
- functions of plasmalemma
- separate internal from ecf, gateway and barrier, guarded wall
- what's the cytosol made of
- dissolved nutrients, proteins, ions, wastes, insoluble inclusions (glycogen granules and lipid droplets)
- 2 groups of nonmembranous organelles that are in direct contact C cytosol
- RNA/protein and insoluble chon fibers
- RNA/protein organelles: ribosomes
- small dense granules that MAKE chon per DNA's directions. fixed on outside of ER or free (somtimes clustered as pollyribosomes)
- which cells have the most ribosomes
- those that make CHON to be exported (ex: enzymes)
- what's a vault
- newly discovered organelle (RNA/chon) in every cell C nuclues (eukaryotic)
- organelles made of chon fibers: 3 sizes
- (1) MICROfilaments. (2) INTERMED filaments, combine to make thick filaments in muscle (3) MICRO-TUBULES
- 5 functions of cytoskeleton
- cell shape, stabilize organelles, intracellular xport, connect cells into tissues, cellnmovement
- what are motor chons
- chons that allow movement within cell and cell as a whole using ATP
- what's a centrosome
- center-body, microtubule assembly area, contains 2 centrioles
- what's a centriole
- cylindrical bundle, 27 microtubules (9 triplets), direct DNA strand movement for cell division
- what's a cilia
- like self moving brush bristles on cell surface made of microtubules.