Lecture 4 BIO 344 Chapter 10 and 11.

Slides:

Advertisements

Similar presentations

Chp 4 Transport of Solutes and Water. Review 1- The intracellular and extracellular fluids are similar in osmotic concentration but very different in.

Advertisements

Cell Membranes & Transport. Cell Membranes F5-1 Cell membrane distinguishes one cell from the next. Cell membranes do the following: a) Regulates exchange.

Stephen Fish, Ph.D. Marshall University J. C. E. School of Medicine

Chapter 5: Homeostasis and Cell Transport.  The steady – state physiological condition of the body of a cell.  Cell membranes help organisms maintain.

Energy and Metabolism Chapter 4 Part Movement of Ions and Molecules  For metabolism to work, a cell must keep its internal composition stable.

Lecture 5: Membrane transport

Review For Final I. Should I take the final? Can’t hurt you Calculate your average and determine what you need to change your grade.

Membrane Transport Chapter 11. Transcellular transport of glucose.

Cell Membrane Transport

Lecture 3 BIO 344. Hydrophobic amino acids in green and yellow.

Membrane Transport.

Lecture 5: Membrane Transport and Electrical Properties.

Nerve and muscle signalling © Dr Bill Phillips 2002, Dept of Physiology Rm N348 Anderson Stuart Bldg.

Membrane transport: The set of transport proteins in the plasma membrane, or in the membrane of an intracellular organelle, determines exactly what solutes.

Chapter 5 Active Transport.

Passive and Active Transport

Transport Across Membranes

Cell Physiology Part 3 – Membrane Transport Agenda Review Membrane Potentials Membrane Transport –Passive –Active Summary of Membrane Function.

Chapter 7 Membranes. Essential knowledge: Cell membranes are selectively permeable due to their structure. Function of the Membrane: – Cell membranes.

Membrane Structure & Function AP Biology Chapter 7.

Cell Membrane Selectively Permeable. Basic Structure Double layer of phospholipids Referred to a bilayer A phospholipid has a head and two tails The phospholipids.

Water and Solute Transport. Homeostasis Requires Exchange of Materials Transportation of solutes in solution –Movement between external and internal environments.

Membrane Transport.  What are some substances commonly transported across membranes?

Chapter 4 Movement of Molecules Across Cell Diffusion Mediated transport system - faciliated transport - active transoprt Osmosis Endocytosis and exosctosis.

The Cellular Level of Organization A. A. Generalized animal cell A. B. B. Plasma (cell) membrane B. 1. Membrane chemistry and anatomy 1. Membrane chemistry.

Cellular Transport and Tonicity

Cellular Transport. I. General A. Definition = molecules moving across the cell membrane B. Cell Membrane is selectively permeable (lets some things in,

Unit 1 Opener neuro4e-unit-01-opener.jpg.

Membrane Transport and the Membrane Potential In Lecture Today: Cell membrane - Mechanisms of transport across the cell membrane: –Diffusion, and rate.

Types of Transport The various ways in which particles move in and out of cells!

Cell Membrane & Transport  Fluid mosaic model - Lipids, proteins & carbohydrates  Membrane trafficking - Passive Transport - Active Transport - Bulk.

Permeability Of Lipid Bilayer Smaller and more hydrophobic molecules diffuse across membrane more rapidly.

Bell Work What is the difference between osmosis and diffusion? What is similar between osmosis and diffusion?

Membrane Structure & Function AP Biology Chapter 7.

Cell Membranes.

Facilitated Diffusion and Active Transport

Structural description of the biological membrane. Physical property of biological membrane.

Sodium-Potassium pumps The cell membrane as an electrical battery.

Active Transport Section 4.2. Movement Against a Concentration Gradient  The transport of a substance across the cell membrane against its concentration.

Part 3: Homeostasis and Cell Transport (Chapter 5)

Transportation of Molecules. Cellular Transport Carbohydrate Chain Lipid Bilayer.

Cellular Membranes Two main roles

Chapter 3: Cellular Level of Organization. Introduction Smallest unit performing vital physiological functions Sex Cells Somatic Cells Homeostasis maintained.

Chapter 4 Transport of Substances Through Cell Membranes Dr. Marko Ljubković Department of Physiology 1.

Cell transport 7.3. Key Questions 1.What is passive transport? 2.What is active transport?

Cellular Transport Molecules moving across the cell membrane Cell Membrane is selectively permeable (lets some things in, some things out, but not everything)

AH BIOLOGY: CELLS AND PROTEINS- PPT 6 MEMBRANE PROTEINS: CHANNEL AND TRANSPORT PROTEINS.

THE CELL MEMBRANE The Key to Cellular Transport. Characteristics of the Cell Membrane  Made of phospholipids – arranged in two layers called a bilayer.

MOVEMENT OF SUBSTANCES DIFFUSION Learning Outcomes After completing this chapter, you will able to : Define diffusion as the movement of molecules from.

History of Fluid Mosaic Model For more on this history, see: 2/membrane.htm.

Alberts • Johnson • Lewis • Morgan • Raff • Roberts • Walter

Transport through the cell membrane

The Key to Cellular Transport

Biochemistry Free For All

maintaining homeostasis

Lecture 6: Membrane transport

Movement Across a Membrane A Review

Movement Across a Membrane A Review

Membrane Permeability

Membrane Transport Dr. Kevin Ahern.

The Key to Cellular Transport

TEK B.4B Concept: Investigate and Identify Processes Including Transportation of Molecules 11/24/2018.

Cellular Transportation

Facilitated Diffusion and Active Transport

AH Biology: cells and proteins- PPT 6

Today: Membrane Function Structure & Function

Movement of particles across the cell membrane without using energy

Movement of particles across the cell membrane without using energy

What did you observe about membrane behavior from this video?

Presentation transcript:

Lecture 4 BIO 344 Chapter 10 and 11

Membrane Transport of Small Molecules and the Electrical Properties of Membranes Chapter 11

Molecule movement across lipid bilayer without proteins

Permeability across lipid bilayer

Carrier Proteins

Channel Proteins

Passive vs. Active Transport

Three Ways of Driving Active Transport

Electrochemical gradient vs. membrane potential Can work additively or against each other

Three Ways of Driving Active Transport

Conformational Change in Carrier Protein mediates passive transport

Three Types of Carrier Mediated Transport

DVD Clip 43

Mechanism of Na+ - glucose carrier Binding of Na+ and glucose is cooperative

DVD Clip 44

Microvilli in the small intestine

Transcellular transport of glucose

The Na+ - K+ pump is an ATPase

DVD clip 42

Response of red blood cells to changes in osmolarity of extra cellular fluids

Distribution of phospholipids and glycolipids in the lipid bilayer of human red blood cells

Few Ions are required to cause a large change in membrane potential

Electrochemical gradient vs. membrane potential Can work additively or against each other

Selectivity of a K+ channel

DVD Clip 45

Ion Channels fluctuate between closed and open conformations

Gating of K+ channel

Gating of Ion Channels

A Typical Vertebrate Neuron

Ball and Chain Model of Rapid inactivation of ion channel

Propagation of Action Potential

Changes in Na+ channels and the action potential

Changes in Na+ channels and the action potential