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Chapter 3 Section 2 - 6th
Chapter 3 Section 2 - 6th

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this PowerPoint - Mr. Hunsaker`s Classes

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From Molecules to Mind: New Discoveries in Neuroscience – Spring

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Brain PowerPoints - Raleigh Charter High School

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Human Anatomy, First Edition McKinley&O'Loughlin

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Puzzle 2A: The Neuron and Nervous System

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GEOTRAN - Life Solutions Institute

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Examples of the value of animal use in neuroscience from the FENS

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Nervous System PPT
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... he/she would raise his/her hand. The teacher would recognize this signal and direct his/her attention to the student. Your body works in much the same way. The nervous system is one of your body’s personalized communication systems. Signals are sent from one location to another in order to control a ...
CHAPTER 2: NEUROSCIENCE AND BEHAVIOUR
CHAPTER 2: NEUROSCIENCE AND BEHAVIOUR

...  A neuron consists of a cell body and branching fibres. The dendrite fibres receive information from sensory receptors or other neurons, and the axon fibres pass that information along to other neurons.  A neural impulse fires when the neuron is stimulated by pressure, heat, light, or chemical mes ...
cell body
cell body

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Blood–brain barrier



The blood–brain barrier (BBB) is a highly selective permeability barrier that separates the circulating blood from the brain extracellular fluid (BECF) in the central nervous system (CNS). The blood–brain barrier is formed by brain endothelial cells, which are connected by tight junctions with an extremely high electrical resistivity of at least 0.1 Ω⋅m. The blood–brain barrier allows the passage of water, some gases, and lipid-soluble molecules by passive diffusion, as well as the selective transport of molecules such as glucose and amino acids that are crucial to neural function. On the other hand, the blood–brain barrier may prevent the entry of lipophilic, potential neurotoxins by way of an active transport mechanism mediated by P-glycoprotein. Astrocytes are necessary to create the blood–brain barrier. A small number of regions in the brain, including the circumventricular organs (CVOs), do not have a blood–brain barrier.The blood–brain barrier occurs along all capillaries and consists of tight junctions around the capillaries that do not exist in normal circulation. Endothelial cells restrict the diffusion of microscopic objects (e.g., bacteria) and large or hydrophilic molecules into the cerebrospinal fluid (CSF), while allowing the diffusion of small hydrophobic molecules (O2, CO2, hormones). Cells of the barrier actively transport metabolic products such as glucose across the barrier with specific proteins. This barrier also includes a thick basement membrane and astrocytic endfeet.
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