refractory period
... (milliseconds), long-distance (up to meters) communication in the body • As opposed to • chemical messages - which can be longdistance, but slow (seconds to minutes) • decremental electric currents - which are rapid, but can only operate over short distances (a few tens of microns) ...
... (milliseconds), long-distance (up to meters) communication in the body • As opposed to • chemical messages - which can be longdistance, but slow (seconds to minutes) • decremental electric currents - which are rapid, but can only operate over short distances (a few tens of microns) ...
The Nervous System - FW Johnson Collegiate
... - no other cells carry a charge - the electrochemical event (charge) is caused by an unequal concentration of positive ions across the cell membrane - The reversal of charges (from negative to positive) is described as an action potential - A potassium pump pulls K+ into the cell and a sodium pump p ...
... - no other cells carry a charge - the electrochemical event (charge) is caused by an unequal concentration of positive ions across the cell membrane - The reversal of charges (from negative to positive) is described as an action potential - A potassium pump pulls K+ into the cell and a sodium pump p ...
Chapter 13 and 16
... A. Astrocyte- function in creating bloodbrain barrier, provide structure B. Oligodendocyte- produce myelin sheath C. Microglia- immune cells of CNS, similar to macrophages D. Ependymal- found in ventricles of brain, produce cerebrospinal fluid ...
... A. Astrocyte- function in creating bloodbrain barrier, provide structure B. Oligodendocyte- produce myelin sheath C. Microglia- immune cells of CNS, similar to macrophages D. Ependymal- found in ventricles of brain, produce cerebrospinal fluid ...
The Brain and the Neuron (1)
... • Railroad worker who had a spike fly through his skull due to an explosion. (Frontal Lobe) • Most famous case in neuroscience. • Personality changed after the accident. ...
... • Railroad worker who had a spike fly through his skull due to an explosion. (Frontal Lobe) • Most famous case in neuroscience. • Personality changed after the accident. ...
Basic Information
... Output transmitters: Gaba (Gamma-amino butyric acid) acts as output transmitter at Axon terminal. iv ...
... Output transmitters: Gaba (Gamma-amino butyric acid) acts as output transmitter at Axon terminal. iv ...
The retinal toxicity of an antiepileptic drug blocking the GABA
... remains excitatory in the adult retinal network. Furthermore, it can activate GABAc receptors, which do not desensitize and thus generate large sustained responses. These specificities could explain the retinal toxicity of vigabatrin, an anti-epileptic drug. Indeed, this drug blocks the GABA-transam ...
... remains excitatory in the adult retinal network. Furthermore, it can activate GABAc receptors, which do not desensitize and thus generate large sustained responses. These specificities could explain the retinal toxicity of vigabatrin, an anti-epileptic drug. Indeed, this drug blocks the GABA-transam ...
Histology of Nervous Tissue
... • Dendrites receive stimuli (signals) from sensory cells, axons, or other neurons and convert these signals into small electrical impulses (action potentials) that are transmitted toward the soma. • The dendrite cytoplasm is similar to that of the soma except that it lacks a Golgi complex. • Organe ...
... • Dendrites receive stimuli (signals) from sensory cells, axons, or other neurons and convert these signals into small electrical impulses (action potentials) that are transmitted toward the soma. • The dendrite cytoplasm is similar to that of the soma except that it lacks a Golgi complex. • Organe ...
Transgenic Mice How to Make A Transgenic Mouse
... Lox sites inserted next to target gene (e.g. MAPK). Lox sites have no effect on their own. Normal expression of target gene. ...
... Lox sites inserted next to target gene (e.g. MAPK). Lox sites have no effect on their own. Normal expression of target gene. ...
Answers - Mosaiced.org
... Follows that significant –ve potential needed to balance tendency of K+ to diffuse down concentration gradient out of cell. Membrane slightly permeable to Na+, so memb potential slightly more positive than K+ eqm potential (to balance flow of Na+ into cell down conc gradient). 85. closed 86. depolar ...
... Follows that significant –ve potential needed to balance tendency of K+ to diffuse down concentration gradient out of cell. Membrane slightly permeable to Na+, so memb potential slightly more positive than K+ eqm potential (to balance flow of Na+ into cell down conc gradient). 85. closed 86. depolar ...
Brain Questions
... 10- What is Wallerian degeneration? 11- What are the four major divisions of the brain? List one function of each. 12- What are the names of the lobes of the cerebrum? What bones are they covered by? 13- What are the dura and pia mater? 14- What are the thalamus, hypothalamus and pineal gland? What ...
... 10- What is Wallerian degeneration? 11- What are the four major divisions of the brain? List one function of each. 12- What are the names of the lobes of the cerebrum? What bones are they covered by? 13- What are the dura and pia mater? 14- What are the thalamus, hypothalamus and pineal gland? What ...
What happens in hereditary color deficiency? Red or green cone
... For these cells any change in their firing rate will convey important info (i.e. color vision) Different rhythms of firing also can convey different information ...
... For these cells any change in their firing rate will convey important info (i.e. color vision) Different rhythms of firing also can convey different information ...
STUDY GUIDE CHAPTERS 48 and 50 THE NERVOUS SYSTEM
... occur at the chemical synapse. G. Define EPSP and IPSP. An EPSP brings the membrane potential closer to threshold, and the IPSP brings the membrane potential further from threshold. Which makes an action potential more likely? H. Neurotransmitters do not stay in the synaptic cleft for long. What can ...
... occur at the chemical synapse. G. Define EPSP and IPSP. An EPSP brings the membrane potential closer to threshold, and the IPSP brings the membrane potential further from threshold. Which makes an action potential more likely? H. Neurotransmitters do not stay in the synaptic cleft for long. What can ...
Method and System for Delivering Nucleic Acid into a Target Cell
... UW-Madison researchers have developed a DNA delivery method that uses a sequestering approach to enable spatial and temporal control over the transfection of stem cells. Oligonucleotide “handles” are covalently attached to a supporting substrate, which may be a solid surface or a two- or three-dimen ...
... UW-Madison researchers have developed a DNA delivery method that uses a sequestering approach to enable spatial and temporal control over the transfection of stem cells. Oligonucleotide “handles” are covalently attached to a supporting substrate, which may be a solid surface or a two- or three-dimen ...
File
... Inducers: signaling molecules (diffusible or cell-tethered) that direct the expression of specific genes that determine a cell’s differentiation Competence: the ability of a cell to respond to inductive signals; determined by its repertory of receptors, transduction molecules, ...
... Inducers: signaling molecules (diffusible or cell-tethered) that direct the expression of specific genes that determine a cell’s differentiation Competence: the ability of a cell to respond to inductive signals; determined by its repertory of receptors, transduction molecules, ...
cell - Hicksville Public Schools
... • Cells are the basic unit of structure and function (metabolism) • New cells come from preexisting cells ...
... • Cells are the basic unit of structure and function (metabolism) • New cells come from preexisting cells ...
Nervous Tissue - Chiropractor Manhattan | Chiropractor New
... The closing of Na+ channels and the slow opening of K+ channels allows for repolarization. ...
... The closing of Na+ channels and the slow opening of K+ channels allows for repolarization. ...
Cellular Neuroscience
... Already before the specific tuning properties of sensory receptors could be demonstrated, Rene Descartes hypothesized that sensory afferents carry modality specific information to the brain. Microstimulation of single cutaneous afferents in human volunteers links specific nerve fibres to specific se ...
... Already before the specific tuning properties of sensory receptors could be demonstrated, Rene Descartes hypothesized that sensory afferents carry modality specific information to the brain. Microstimulation of single cutaneous afferents in human volunteers links specific nerve fibres to specific se ...
Invertebrates
... – No symmetry, tissues, or organs – Flattened cells line the body wall (many pores; spikes of silica and/or proteins) – Skeleton of silicon, calcium, or spongin (protein fibers) – Filter feeders (flagellated collar cells absorb food; amoeboid cells digest and distribute it) – Hermaphrodites – Zygote ...
... – No symmetry, tissues, or organs – Flattened cells line the body wall (many pores; spikes of silica and/or proteins) – Skeleton of silicon, calcium, or spongin (protein fibers) – Filter feeders (flagellated collar cells absorb food; amoeboid cells digest and distribute it) – Hermaphrodites – Zygote ...
4.1 Introduction to the Cell
... *All living things are composed of 1 or more cells *Cells are the basic unit of structure and function in an organism *Cells come only from the reproduction of existing cells ...
... *All living things are composed of 1 or more cells *Cells are the basic unit of structure and function in an organism *Cells come only from the reproduction of existing cells ...
Tutorial 10: Temporal and Spatial Summation Figure 10: Temporal
... Jumping from the seeds of our understanding of neuronal integration to the present involves a shift in technology. New recording techniques that allow for simultaneous recording from multiple sites of the dendritic tree have shed light on mechanisms underlying spatial summation. One recent study has ...
... Jumping from the seeds of our understanding of neuronal integration to the present involves a shift in technology. New recording techniques that allow for simultaneous recording from multiple sites of the dendritic tree have shed light on mechanisms underlying spatial summation. One recent study has ...
Nerve cells - Dr Magrann
... receptors. They are carried by nerve fibers of PNS to the CNS Motor (efferent) signals are carried away from the CNS. They innervate muscles and glands 1. Receive a signal. Can be any type of stimulus (change in environment, signal from another neuron, etc). 2. Transmit a signal to another location. ...
... receptors. They are carried by nerve fibers of PNS to the CNS Motor (efferent) signals are carried away from the CNS. They innervate muscles and glands 1. Receive a signal. Can be any type of stimulus (change in environment, signal from another neuron, etc). 2. Transmit a signal to another location. ...
Nervous System
... myelin sheath of neurons in the CNS. The sheaths deteriorate to hardened scars or plaques, in multiple regions, thus the name. The plaques interfere with nerve impulse transmission. The average age of onset is 33. The disease is unpredictable. Some people experience complete remissions, while others ...
... myelin sheath of neurons in the CNS. The sheaths deteriorate to hardened scars or plaques, in multiple regions, thus the name. The plaques interfere with nerve impulse transmission. The average age of onset is 33. The disease is unpredictable. Some people experience complete remissions, while others ...
Chapter 7: the Nervous System
... • Cells of the central nervous system have a very limited ability to regenerate themselves • The cells themselves are soft and easily damaged (your brain has the consistency of tofu) • The blood-brain barrier refers to the fact that capillaries in the brain are less permeable than those in other par ...
... • Cells of the central nervous system have a very limited ability to regenerate themselves • The cells themselves are soft and easily damaged (your brain has the consistency of tofu) • The blood-brain barrier refers to the fact that capillaries in the brain are less permeable than those in other par ...
Channelrhodopsin
Channelrhodopsins are a subfamily of retinylidene proteins (rhodopsins) that function as light-gated ion channels. They serve as sensory photoreceptors in unicellular green algae, controlling phototaxis: movement in response to light. Expressed in cells of other organisms, they enable light to control electrical excitability, intracellular acidity, calcium influx, and other cellular processes. Channelrhodopsin-1 (ChR1) and Channelrhodopsin-2 (ChR2) from the model organism Chlamydomonas reinhardtii are the first discovered channelrhodopsins. Variants have been cloned from other algal species, and more are expected.