9.24_Cell_Anatomy

9.24_Cell_Anatomy - Cell Anatomy Plasma membrane- fluid...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
Cell Anatomy Plasma membrane- fluid mosaic -phospholipid bilayer -polar head; two non polar tails-fatty acid -amphipathic -spontaneously form -Cholesterol -Amphipathic -vesicle formation -not in organelles -Embedded Proteins- 1) Integral -not removable -amphipathic -channels, receptors, anchors -many are transmembrane 2) Peripheral -polar -located on cytosolic surface -function: shape and motility of cell Plasma membrane- Receptor -chemical messenger=LIGAND -cell-surfaced protein= RECEPTOR -Allows cell to receive info -binding based on matching shape and charge -degree of matching= affinity (receptor to ligand) Plasma membrane- Junctions -Cell to cell interactions formation of tissues -physical connection between cells 1) Desmosome -protein linkage between cells -spot welds -allows interstitial flow 2) Tight Junction -joining of plasma membrane -forms a band around the cell -block interstitial flow 3) Gap Junctions -channels link between two cytosols -moves from one cell to another -small diameter so limited exchange -important in transmission of electrical activity -allows interstitial flow
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 04/22/2008 for the course EEOB 232 taught by Professor Bronson during the Spring '07 term at Ohio State.

Page1 / 2

9.24_Cell_Anatomy - Cell Anatomy Plasma membrane- fluid...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online