'Exocytosis' diaporamas de présentation

CELLS

CELLS. Chapter 3. Molecules move across membranes in several ways. Passive transport. Two kinds Diffusion Osmosis. Diffusion and Concentration Gradients. Diffusion . Simple & Facilitated Diffusion. simple diffusion facilitated diffusion . Defects in Transport Proteins .

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Synaptic Transmission

Synaptic Transmission. Synaptic Events. Action Potential reaches axon terminal Chemical substance released Neurotransmitter (NT) Diffuses across synapse Binds to receptor protein EPSP or IPSP ~. Synaptic Transmission Model. Precursor transport NT synthesis Storage Release

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Types Cell transport across the cell membrane

Types Cell transport across the cell membrane. Cell Membrane structure . Phospholipid Bilayer Proteins (peripheral and integral) Carbohydrates . Functions of the cell membrane . Protective barrier that regulates transport in & out of cell ( selectively permeable)

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Diffusion and Osmosis: How does stuff get into and out of a cell?

Diffusion and Osmosis: How does stuff get into and out of a cell?. The Cell in its Environment Ch 7, Section 2 L3 Biology. Molecules are always moving. Molecules move randomly and bump into each other and other barriers. Diffusion.

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Protein Secretion

Protein Secretion. Higher Biology. Rough Endoplasmic Reticulum (rough ER). System of flattened sacs and tubules Encrusted with ribosomes on the outer surface if their membranes Continuous with outer nuclear membrane Provides a large surface area for chemical reactions

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Cell Transport

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Remember!

Remember!. Osmosis is the movement of water across a semi-permeable membrane! Until there is an equal amount of free water molecules on each side!. Osmosis in Cells. Isotonic Solution. The same concentration of solute on both sides of the membrane

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Active Transport

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Cell Membrane and Transport Study Guide

Cell Membrane and Transport Study Guide. 1. Draw a box around one phospholipid. 2. Label the brackets as being either hydrophobic region or hydrophilic region. 3. Label all the leader lines with the following terms: carbohydrate side chain marker protein channel protein. Channel protein.

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Cellular Transport

Cellular Transport. Passive Transport. When a cell moves particles across its membrane without using energy. Either by Simple Diffusion Or by Facilitated Diffusion http://www.youtube.com/watch?v=kfy92hdaAH0&feature=related&safety_mode=true&persist_safety_mode=1. Facilitated Diffusion .

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Cyclic Voltammetry for the Detection of Dopamine in vivo

Cyclic Voltammetry for the Detection of Dopamine in vivo. Dopamine. Neurotransmitter small molecule chemical messenger Important for motor and cognitive functions Deficts in dopamine levels cause Parkinson Disease Regulates reward Dopamine increases after drugs of abuse like cocaine.

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ACTIVE TRANSPORT: Transport of Large molecules using energy

ACTIVE TRANSPORT: Transport of Large molecules using energy. ATP. Active Transport. Requires energy or ATP Can move materials from LOW to HIGH concentration AGAINST concentration gradient. ACTIVE TRANSPORT EXAMPLE #1:.

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Passive vs. Active Transport

Passive vs. Active Transport. Passive Transport. Does NOT require energy Moves substances from higher to lower concentration. Types of Passive Transport. Diffusion - movement of any type of particle from high concentration to low concentration. Types of Passive Transport.

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The Pituitary Gonadotropes, II

The Pituitary Gonadotropes, II. Articles on Ca 2+ signaling in P.G. . [1] A. Tse, F.W. Tse, W. Almers, and B. Hille, Rhythmic exocytosis stimulated by GnRH-induced calcium oscillations in rat gonadotropes, Science 60: 82-84, 1993.

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Crossing the Cell Membrane

Crossing the Cell Membrane. Osmosis Active Transport Passive transport Diffusion Endo/ Exo - Cytosis. Warm Up Questions:. All _______________ are composed of cells. New cells are produced from _________________. What is the main purpose of the cell membrane?

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3. Endocytosis : taking material into the cell using part of the cell membrane.

Happy Monday! Science Fact of the Day: The female Tarantula Hawk wasp paralyzes a large spider with her sting. She then lays her eggs on the motionless body so that her developing young have a fresh supply of spider meat to feed on.

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Passive and Active Transport

7b. Passive and Active Transport. Passive Transport. Diffusion across a membrane, no ___________. Diffusion: tendency to spread out, move from ____ concentration to ____ concentration. Any substance will diffuse down its __________ ____________. Osmosis.

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