Cell Theory 2.1

MRS GREN:

Movement

Respiration

Sensitivity

Growth

Reproduction

Excretion

Nutrients

Cell theory

1) cells are the most basic units of life where all chemical reactions occur

2) All cell come from pre existing cells

3) All organism are made of one or more cells

Phospholipid - hydrophilic, polar head (attracts water) and a hydrophobic non polar tail (repels water)

Phospholipid bilayer - made of two rows of phospholipids to create semi permeable, lets some substance through but not others

Fluid mosaic model - fluid , the ability of proteins and lipids to moves sideways giving its structure, mosaics the variety of proteins and molecules within the phospholipid bilayer

Two types of proteins - integral (permanent) peripheral (temporary)

Cholesterol - between phoslipids and helps with the fluidity of the structure

glycolipid - lipid with carbohydrate chain attached

glycoprotien - protein with carbohydrate chain attached

receptors - aid in cell communication and recognition of e.g hormones and antigens

channel and carrier - help move substances across the membrane by either active or passive transport

protein on the underside - held by the cytoskeleton

cytoskeleton - framework of microfilaments that hold the cells shape, move organelles around and aid in cell division