Nervous tissue i
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Neural tissue consists of neurons and glial cells. Glial cells in the peripheral nervous system include satellite cells and Schwann cells. Glial cells in the central nervous system are made of astrocytes, oligodendrocytes, ependymal cells, and microglial cells. Main functions of the astrocytes are structural support, repair processes, forming the blood-brain barrier, metabolic exchanges, and scar formation.
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The nervous system can be divided into the central nervous system (CNS) and peripheral nervous system (PNS). The CNS consists of the brain and spinal cord and is responsible for integrating sensory information and coordinating motor commands. The PNS has two parts - the cerebrospinal part made up of cranial and spinal nerves, and the autonomic nervous system. There are two main cell types in the nervous system - neurons, which transmit signals, and neuroglia, which provide support and insulation. The autonomic nervous system has two divisions - the parasympathetic and sympathetic systems, which work in opposition to activate "rest and digest" and "fight or flight" responses respectively.
Nervous tissue 1
Neural tissue conducts electrical impulses and transmits signals between the central nervous system and other body structures. It develops through processes like cell proliferation, differentiation, migration, and outgrowth of neuronal processes. Neural tissue contains neurons, which generate and transmit nerve impulses, and neuroglia, which support and protect neurons. Neurons have a cell body, dendrites that receive signals, and an axon that conducts signals away from the cell body. Neuroglia include astrocytes, oligodendrocytes, ependymal cells, and microglia. Myelinated axons allow for faster signal conduction than unmyelinated axons.
Ns3 Review Of The Organization Of The Nervous System
The document provides an overview of the organization of the nervous system. It discusses the central nervous system (CNS) which includes the brain and spinal cord, and the peripheral nervous system (PNS) which connects the CNS to sensory receptors and effector organs. The nervous system is composed of neurons and glial cells. Neurons have cell bodies, dendrites, axons and synaptic terminals. They communicate via electrical and chemical signals. The organization of the nervous system allows it to perform functions like sensation, movement, thinking and homeostasis.
Introduction to cns
This document provides an introduction to neurophysiology. It discusses the classification of the nervous system into the central nervous system (CNS) and peripheral nervous system. Within the CNS, it is classified into grey matter and white matter. The basic structural and functional unit of the nervous system, the neuron, is described in detail. The structure and function of the synapse is also explained. Different types of neurons are classified. The composition of the nervous system includes neurons and supporting neuroglia cells. Various receptors and sensory systems are outlined. Important neurotransmitters are identified.
Neurons and Nervous Systems
This document provides an outline of topics related to neurons and the nervous system. It begins by discussing the evolution of the nervous system, noting the gradual increase in complexity and that all vertebrates have a well-developed brain. It then covers nervous tissue, the brain and spinal cord, peripheral nervous system, invertebrate and vertebrate nervous organization, and the specific human nervous system including the central and peripheral components.
Nervous system
The nervous system is the body's control and communication system that regulates all bodily functions. It has two main parts - the central nervous system consisting of the brain and spinal cord, and the peripheral nervous system made up of nerves outside the brain and spinal cord. The nervous system contains neurons, or nerve cells, which receive and transmit electrochemical signals, as well as neuroglial cells that support and protect neurons. The neuron is the basic structural and functional unit of the nervous system.
Nervous System
The document summarizes the structure and function of the nervous system in three main divisions:
1) The central nervous system (CNS) consists of the brain and spinal cord. The peripheral nervous system (PNS) consists of the nerve network outside the CNS.
2) Neuroglia are supportive cells in the nervous system that form myelin sheaths and blood-brain barriers. The most numerous neuroglial cell is the astrocyte.
3) Neurons handle communication in the nervous system and are classified as sensory, motor, or interneurons. Impulse conduction in neurons involves changes in membrane potential and the firing of action potentials.
13. The Nervous System
The document summarizes key aspects of the nervous system, including:
1) It describes the basic structures and functions of neurons, neuroglia, the cerebrum, cerebellum, diencephalon, and brain stem.
2) It explains the organization and direction of signals in the central and peripheral nervous systems, including afferent, efferent, somatic, and autonomic nerves.
3) It outlines the processes of neuronal signaling including resting potential, depolarization, repolarization, synaptic transmission, and types of neurotransmitters.
4) It defines structures like the meninges and cerebrospinal fluid, and reflexes like stretch, withdrawal, and crossed extensor
Physbrain
This document provides an outline for a lecture on neurophysiology. It begins with an introduction and overview of the nervous system, including its basic functions of sensory, interpretive, and motor functions. It then discusses the fine anatomy of the nervous system including neurons, the central nervous system, peripheral nervous system, and divisions of the peripheral nervous system. Finally, it covers topics like the structure and function of neurons, neuroglia, myelination, regeneration, and action potentials.
Brain Anatomy & Physiology
The document provides an overview of the nervous system, including its basic functions and organization. It describes the different types of neurons (sensory, motor, interneurons), divisions of the nervous system (central, peripheral, somatic, autonomic), and components of neurons (cell body, dendrites, axon, myelin sheath). It also summarizes the mechanisms of the action potential, synaptic transmission, and refractory periods.
Human regulatory system 1
The regulatory system in the human body consists of the neural system, endocrine system, and sensory organs. The neural system contains nerve cells that transmit electrical and chemical signals throughout the body to coordinate functions. Disorders can occur if there are imbalances in neurotransmitters in the neural system, which can be caused by conditions like Parkinson's disease or affected by drugs that influence neurotransmitters.
Pons
The pons is located in the brainstem, between the midbrain and medulla oblongata. It contains fibers that connect the cerebellum and cerebrum, and nuclei for several cranial nerves including the trigeminal, facial, and abducent nerves. The pons receives its blood supply primarily from the basilar artery and its branches, as well as the anterior inferior cerebellar and superior cerebellar arteries. It plays an important role in motor functions and sensory processes.
what is nervous tissue
The document discusses the structure and function of the nervous system. It describes how the nervous system is composed of nervous tissue, including neurons and neuroglial cells. Neurons are the conducting cells that send and receive signals, while neuroglial cells provide support and insulation. The document outlines the key cell types, their roles, and organizational structure of the central and peripheral nervous systems.
Nervous System -Autonomic Nervous System-Neurons -Ganglia - Nerves Copy.
The nervous system is the body's communication network, coordinating and regulating all bodily functions. Comprising the central nervous system (CNS) and peripheral nervous system (PNS), it consists of neurons, specialized cells transmitting electrical and chemical signals. The CNS, consisting of the brain and spinal cord, interprets and processes information. The PNS extends from the CNS, transmitting signals between the brain, spinal cord, and the rest of the body. Sensory neurons detect stimuli, while motor neurons control muscle movement. This intricate system enables sensory perception, voluntary and involuntary actions, and regulates bodily processes, ensuring homeostasis and facilitating responses to the environment.
Nervous System -Autonomic Nervous System-Neurons -Ganglia - Nerves Copy.
The nervous system is the body's communication network, coordinating and regulating all bodily functions. Comprising the central nervous system (CNS) and peripheral nervous system (PNS), it consists of neurons, specialized cells transmitting electrical and chemical signals. The CNS, consisting of the brain and spinal cord, interprets and processes information. The PNS extends from the CNS, transmitting signals between the brain, spinal cord, and the rest of the body. Sensory neurons detect stimuli, while motor neurons control muscle movement. This intricate system enables sensory perception, voluntary and involuntary actions, and regulates bodily processes, ensuring homeostasis and facilitating responses to the environment.
corelating neurohistology with functions By Dr. Arshad
Neurons are specialized cells that rapidly communicate via long processes called neurites. In the central nervous system, neuronal cell bodies and dendrites are found in gray matter, while axons wrapped in myelin sheaths comprise white matter. Neurons maintain a resting potential and generate action potentials to transmit signals. They communicate via synapses, where chemical transmitters trigger changes in the receiving cell. Axotomized neurons degenerate if cut off from their cell bodies, and regeneration is limited in the central nervous system. The CNS contains two main cell types: neurons, which conduct signals, and neuroglial cells like astrocytes and oligodendrocytes, which provide support.
Structure of neuron
The document describes the main parts of a neuron and their functions. The axon carries nerve impulses away from the cell body, while dendrites carry impulses toward the cell body. Schwann's cells form a protective myelin sheath around axons, and the myelin sheath insulates and speeds up nerve impulses. Synapses allow neurons to transmit electrical signals to other neurons through the release of neurotransmitters.
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Nervous tissue i
- 2. Glial Ce ll Neural tissue consists of: n e u ro n s and glial ce lls N e u ro n s
- 3. MAIN TYPES OF NEURONES, ACCORDONG TO THE MORPHOLOGY: UNIPOLAR BIPOLAR PSEUDOUNIPOLAR MULTIPOLAR
- 4. PSEUDOUNIPOLAR NEURONES 76. Spinal ganglion, HE. (low power magnification) Pseudounipolar neurones (perikaryon) Peripheral nerve fibers
- 5. PSEUDOUNIPOLAR NEURONES 76. Spinal ganglion, HE. (high power magnification) Pseudounipolar neurones-perikaryon (nucleus, nucleolus) Satellite cell nucleus Peripheral nerve fibers A-cell D-cell Axon Schwann cell nucleus
- 6. MULTIPOLAR NEURONES I. 79. Autonomic ganglion, Silver-impregnation Perikaryon Nerve fibers
- 7. Central canal Ventral horn (Deiters motoneurones) Segmet
- 8. MULTIPOLAR NEURONES IIa. Deiters motoneurones 80. Spinal cord, HE (low power magnification) Central canal Gray matter White matter Ventral horn (Deiters motoneurones)
- 9. MULTIPOLAR NEURONES IIb. Deiters motoneurones 80. Spinal cord, HE (medium power magnification) Multipolar neurones Ventral horn White matter
- 10. MULTIPOLAR NEURONES IIc. Deiters motoneurones 80. Spinal cord, HE (high power magnification) Multipolar neurone Glial cell nucleus Capillary
- 11. MULTIPOLAR NEURONES IId. Deiters motoneurones 80. Spinal cord, HE (high power magnification) Nucleus Multipolar neurone Nucleolus Glial cell nucleus Capillary
- 12. MULTIPOLAR NEURONES IIe. Deiters motoneurones 80. Spinal cord, HE (high power magnification) Glial cell nucleus Multipolar neurone Nissl-substance Nucleolus Nucleus
- 13. NEUROGLIA GLIA CELLS GLIA CELLS IN THE PNS IN THE CNS - Schwann cell - Oligodendrocytes - Satellite cell - Microglia - Astrocyte - Ependyma
- 14. Myelin formation in nerve fibers: Schwann-cell Oligodendrocyte (PNS) (CNS)
- 15. PERIPHERAL NERVE IN TRANSVERSE SECTION
- 16. PERIPHERAL NERVE IN TRANSVERSE SECTION Paraneurium Epineurium Perineurium Adipose tissue Endoneurium Artery, Vein
- 17. PERIPHERAL NERVE IN TRANSVERSE SECTION 72. Peripheral nerve, HE. (low power magnification) Perineurium Schwann-cell nucleus Axon Myelin sheath Nucleus of fibrocyte
- 18. PERIPHERAL NERVE IN LONGITUDINAL SECTION
- 20. PERIPHERAL NERVE IN LONGITUDINAL SECTION 73. Peripheral nerve, HE. Nucleus of fibrocyte Node of Ranvier Schwann cell nucleus Axon
- 21. PERIPHERAL NERVE IN LONGITUDINAL SECTION 73. Peripheral nerve, HE. Schwann cell nucleus Nodes of Ranvier
- 22. GLIA CELLS IN THE PNS Pseudounipolar neurons Satellite cell nucleus Schwann cell nucleus
- 23. Glial ce lls in th e CN S are m ad e o f as tro cyte s , o ligo d e n d ro cyte s , e p e n d ym al ce lls , an d m icro glial ce lls .
- 24. Main functions of the astrocytes: -structural support -repair processes -blood-brain barrier -metabolic exchanges - scar-making cells
- 25. ASTROCYTES 86. Astrocytes, GFAP Capillary Astrocytes Perivascular limiting membrane