The Nervous System- Nervous Tissue
... Functional classification based on type of information & direction of information transmission: • Sensory (afferent) neurons – • transmit sensory information from receptors of PNS towards ...
... Functional classification based on type of information & direction of information transmission: • Sensory (afferent) neurons – • transmit sensory information from receptors of PNS towards ...
Nervous System - EMTStudyCenter.com
... 6. The different charge between the outside and the inside of a neuron at rest is called action potential. synaptic potential. resting membrane potential. equilibrium potential. 7. The stage in an action potential that immediately follows depolarization is polarization. repolarization. threshold. th ...
... 6. The different charge between the outside and the inside of a neuron at rest is called action potential. synaptic potential. resting membrane potential. equilibrium potential. 7. The stage in an action potential that immediately follows depolarization is polarization. repolarization. threshold. th ...
Ch 11 Part 1 - Groch Biology
... Neurons are mitotic. ___ ____________________ Schwann cells and satellite cells are found only in the CNS. ___ ________________ Ependymal cells show irritability and conductivity. ___ ____________________ Almost 50% of the volume of neural tissue in the CNS is made up of neurons. ___ ______________ ...
... Neurons are mitotic. ___ ____________________ Schwann cells and satellite cells are found only in the CNS. ___ ________________ Ependymal cells show irritability and conductivity. ___ ____________________ Almost 50% of the volume of neural tissue in the CNS is made up of neurons. ___ ______________ ...
Exam
... 4. Name a structure rostral to the midbrain that might have been damaged to produce this pattern of demyelination ...
... 4. Name a structure rostral to the midbrain that might have been damaged to produce this pattern of demyelination ...
Structure of a Neuron Transmission of “Information” Nerve Impulse
... – Across narrow gaps between cells ...
... – Across narrow gaps between cells ...
This Week in The Journal - Journal of Neuroscience
... Rohon-Beard (RB) sensory neurons in zebrafish embryos. Using live imaging, the authors report that central axons chugged along straight paths at a steady 20 m/h. Peripheral axons emerged from the central axon and exited the spinal cord, scattering and branching often to form an epidermal network co ...
... Rohon-Beard (RB) sensory neurons in zebrafish embryos. Using live imaging, the authors report that central axons chugged along straight paths at a steady 20 m/h. Peripheral axons emerged from the central axon and exited the spinal cord, scattering and branching often to form an epidermal network co ...
Slide ()
... The spinal cord varies slightly in diameter along its length but in cross section always shows bilateral symmetry around the small, CSF-filled central canal (C). Unlike the cerebrum and cerebellum, in the spinal cord the gray matter is internal, forming a roughly H-shaped structure that consists of ...
... The spinal cord varies slightly in diameter along its length but in cross section always shows bilateral symmetry around the small, CSF-filled central canal (C). Unlike the cerebrum and cerebellum, in the spinal cord the gray matter is internal, forming a roughly H-shaped structure that consists of ...
neuron
... • arborisation (branching) increases receptive area of the cell (100 000 contacts and more) • dendritic spines (site of synapse - postsynaptic membrane, actin microfilaments • neurofilaments (NF-L, NF-M, NF-H), other cytoskeleton units, proteosynthetic apparatus except GA • always non- myelinated ...
... • arborisation (branching) increases receptive area of the cell (100 000 contacts and more) • dendritic spines (site of synapse - postsynaptic membrane, actin microfilaments • neurofilaments (NF-L, NF-M, NF-H), other cytoskeleton units, proteosynthetic apparatus except GA • always non- myelinated ...
BOX 2.1 THE NEURON DOCTRINE The cell theory, which states
... The cell theory, which states that all organisms are composed of individual cells, was developed around the middle of the nineteenth century by Mattias Schleiden and Theodor Schwann. However, this unitary vision of the cellular nature of life was not immediately applied to the nervous system, as mos ...
... The cell theory, which states that all organisms are composed of individual cells, was developed around the middle of the nineteenth century by Mattias Schleiden and Theodor Schwann. However, this unitary vision of the cellular nature of life was not immediately applied to the nervous system, as mos ...
6AOGPFTarget
... inhibit actin polymerization or the attachment of cell surface receptors to this substrata. • Two early theories: i. Axons advance more or less randomly and were “fine-tuned” as they reached their proper target (either repelled or attachment strengthened). ii. Axons grow along very pre-set (stereoty ...
... inhibit actin polymerization or the attachment of cell surface receptors to this substrata. • Two early theories: i. Axons advance more or less randomly and were “fine-tuned” as they reached their proper target (either repelled or attachment strengthened). ii. Axons grow along very pre-set (stereoty ...
Nervous Tissue
... What is the main function of this tissue? Transmit electrical signals from sensory receptors and to effectors that control their activity ...
... What is the main function of this tissue? Transmit electrical signals from sensory receptors and to effectors that control their activity ...
FIGURE LEGENDS FIGURE 16.1 Scanning electron micrograph of a
... FIGURE 16.2 Multiple guidance cues direct spinal cord commissural axons during neural development. (A) This original drawing by Cajal illustrates neuronal pathways in the developing chick spinal cord, showing several commissural axons extending to the ventral spinal cord and crossing the floor plate ...
... FIGURE 16.2 Multiple guidance cues direct spinal cord commissural axons during neural development. (A) This original drawing by Cajal illustrates neuronal pathways in the developing chick spinal cord, showing several commissural axons extending to the ventral spinal cord and crossing the floor plate ...
Chapter 13
... The following terms are freely used in your text book. Make sure you know what they mean, how they are used, and how to use them. When an example is given, make sure you can describe and recall it. If a picture is provided, know what the structure looks like and where it is located. If a diagram des ...
... The following terms are freely used in your text book. Make sure you know what they mean, how they are used, and how to use them. When an example is given, make sure you can describe and recall it. If a picture is provided, know what the structure looks like and where it is located. If a diagram des ...
Netrin
Netrins are a class of proteins involved in axon guidance. They are named after the Sanskrit word ""netr"", which means ""one who guides."" Netrins are genetically conserved across nematode worms, fruit flies, frogs, mice, and humans. Structurally, netrin resembles the extracellular matrix protein laminin.Netrins are chemotropic; a growing axon will either move towards or away from a higher concentration of netrin. Though the detailed mechanism of axon guidance is not fully understood, it is known that netrin attraction is mediated through UNC-40/DCC cell surface receptors and repulsion is mediated through UNC-5 receptors. Netrins also act as growth factors, encouraging cell growth activities in target cells. Mice deficient in netrin fail to form the hippocampal comissure or the corpus callosum.A proposed model for netrin activity in the spinal column of developing human embryos is that netrins are released by the floor plate and then are picked up by receptor proteins embedded in the growth cones of axons belonging to neurons in the developing spinal column. The bodies of these neurons remain stationary while the axons follow a path defined by netrins, eventually connecting to neurons inside the embryonic brain by developing synapses. Research supports that new axons tend to follow previously traced pathways, rather than being guided by netrins or related chemotropic factors.