Cells and Tissues Flashcards
What are eukaryotic cells?
Cells which have visibly evident nuclei and organelles
DNA contained within…
…a nucleus and mitochondria - contained within bundles (chromosomes ) in a membrane bound nucleus
Eukaryotic cells reproduce by…
…Mitosis and meiosis
Cells can be specialised to…
…certain functions.
Cells are grouped into…
…specialised tissues.
Cells are the basic living units of…
…all animals
Most biochemical reactions that sustain life…
…take place inside cells.
Plasma membrane typically made up of…
…phospholipid bilayer and protein molecules which are partially or wholly embedded within it.
Phospholipids contain hydrophillic head which…
…attracts water (water soluble) and hydrophobic tails which repel water.
Main types of hormones are
…lipid soluble and water soluble
The plasma membrane seperates the …
…internal and external environment of the cell
The plasma membrane contains and protects…
…cell contents
The plasma membrane regulates the passage of …
…molecules in and out of the cells via passive diffusion and osmosis and transmembrane protein channels and transporters and endocytosis and exocytosis, in addition to many other functions.
Extracellular = ?
outside the cell
Intracellular = ?
inside of the cell.
The shape of the red blood cell is
bi-concave
Cytoplasm is clear fluid which…
…fills most of the cell volume
Cytoplasma maintains…
…cell shape
Cytoplasm stores…
chemicals for cellular metabolism
What does the cytoplasm contain
Contains ions and RNA and soluble macromolecules (such as proteins enzymes), and Salts
Whats the cytosol?
aqueous part of the cytoplasm, within which various particles and organelles are suspended
…is therefore the fluid portion of the cytoplasma exclusive of organelles and membranes
Typical pH of cytosol is…
…7.0 - 7.4
Cytosol makes up…
…70% of the total volume of a typical cell
Cytosol is made up of…
…water and ions