Cell Intro. Flashcards
Biological Organisation List (Size Increasing)
Atom, Molecule, Macromolecule, Organelle, Cell, Tissue, Organ, Organ System, Organism, Population, Ecosystem, Biosphere
Cell Def.
Basic unit of all plants and animals. Make up[ all tissues of the body
Cell Formation Desc.
From pre-existing cells by mitosis/meiosis
Cell Formation Function
Growth and repair
Cytoplasm Makeup + Location
Viscous, aqueous solution crisscrossed by cytoskeleton fibers. Found between cell membrane and nucleus
Cytosol Def.
Cytoplasm without organelles
Cytoplasm Function
Supports organelles and cellular molecules, transports material in cell (eg hormones), dissolves cell waste + facilitates cellular processes (eg protein synthesis, glycolysis and cell division)
Cell (Plasma) Membrane Structure
Phospholipid bilayer, proteins embedded within and carbohydrates attached (glyco-lipids, glyco-proteins)
Cell Membrane Function
Acts as selectively permeable barrier keeping certain molecules in/out of cell, maintains intracellular pH, responds to changes outside cell
Cytoskeleton Structure
Filaments and tubules. Link with protein embedded in memebrane
Filaments In Cytoskeleton Make Up
Double strands of actin. Enables protein in membrane to connect with extracellular matrix
Cytoskeleton Function
Cell scaffolding, preserves/alters shape providing frame for movement
Nucleus Structure
Nuclear envelope (double membrane), pores, chromatin, nucleoli, nucleoplasm
Nucleus Double Membrane Composition
Smooth inner membrane and outer membrane linked to the endoplasmic reticulum
Nucleoli Function
Assembly place for ribosomes