CELL ORGANIZATION MEMBRANOUS ORGANELLES

MEMBRANOUS ORGANELLES MEANS?

WITH PLASMA MEMBRANE

THE PLASMA MEMBRANE IS?

• THIN

• SELECTIVELY PERMEABLE (ONLY ALLOWS CERTAIN THINGS TO PASS)

• MOSTLY ONLY LIPID SOLUBE THINGS CAN PASS (LIPID BILAYERRRR)

LIPID BILYAER MADE OF

LIPIDS

PROTEINS

CARBOHYDRATES

PLASMA MEMBRANE

• PERMEABLE TO WATER ANS SMALL UNCHARGED MOLECULES

• HAS SPECIAL TRANSPORT SYSTEMS (active transport)

WHAT ARE THE TWO MAJOR PROTEINS IN THE PLAMSA MEMBRANE

1. INTEGRAL PROTEINS (6)

2. PERIPHERAL

INTEGRAL PROTEINS

• EMBEDDED IN THE BILAYER

  • WILL CROSS THE MEMBRANE

PERIPHERAL PROTIENS

• NOT EMBEDDED

  • either on inside of the bilayer or outside of bilayer

WHAT DOES PERIPHERAL PROTEINS HAVE?

LIPIDS (“glycolipids”)

CARBOHYDRATES (“glycocalyx”)

name of intergral protiens

1. pump

2. channels

3. receptors

4. linkers

5. enzymes

6. structural

WHAT IS THE JOB OF INTERGRAL PROTIENS?

CELLULAR METABOLISM, REGULATION AND INTEGRATION

PUMP PROTEINS

WILL PUMP ELECTROLYTES ACROSS MEMBRANE

EX: TRANSPORT IONS AND METABOLIC PRECURSORS

CHANNELS

SO THINGS CAN PASS

EX: THE PASSAGE OF SMALL IONS

RECEPTORS

RECIEVE HORMONES AND NEURTRANSMITTERS

EX: HORMONES AND ANTIBODIES

LINKERS

LINK IN BETWEEN TWO CELLS

EX: ANCHOR INTRACELLULAR CYTOSKELETON

ENZYMES

THAT ARE PROTIENS

EX: ALLOW SODIUM POTASSIUM TO PASS MEMBRANE

EX: ATP SYNTHETASE

EX: DIGESTIVE ENZYME

STRUCTURAL

KEEP STRUCTURE OF TISSUES AND ORGANISM

EX: FORM JUNCTION OF NEIGHBORING CELLSD