Neuron
... action potential) from its initial segment at the cell body to the other end of the axon at the presynaptic terminal. Axon lacks ribosomes and therefore, cannot synthesize proteins. Large axons are surrounded by a fatty insulating coating called myelin. In the peripheral nervous system, myelin is ...
... action potential) from its initial segment at the cell body to the other end of the axon at the presynaptic terminal. Axon lacks ribosomes and therefore, cannot synthesize proteins. Large axons are surrounded by a fatty insulating coating called myelin. In the peripheral nervous system, myelin is ...
1 nervous system organization structure of neurons
... – must push newer layers of myelin under the older ones • so myelination spirals inward toward nerve fiber ...
... – must push newer layers of myelin under the older ones • so myelination spirals inward toward nerve fiber ...
Test 3
... 1. List the structural and functional divisions of the nervous system, and describe their relationship to each other. Nervous system, CNS, PNS, Somatic, ANS. Sensory, integration, motor 2. Describe the types of glial cells, Schwann, oligodendrocyte 3. Explain the physiological characteristics of mat ...
... 1. List the structural and functional divisions of the nervous system, and describe their relationship to each other. Nervous system, CNS, PNS, Somatic, ANS. Sensory, integration, motor 2. Describe the types of glial cells, Schwann, oligodendrocyte 3. Explain the physiological characteristics of mat ...
chapt10_holes_lecture_animation
... • Contains myelinated axons • Considered fiber tracts • Gray Matter • Contains unmyelinated structures • Cell bodies, dendrites ...
... • Contains myelinated axons • Considered fiber tracts • Gray Matter • Contains unmyelinated structures • Cell bodies, dendrites ...
PowerPoint to accompany Hole’s Human Anatomy and
... • Contains myelinated axons • Considered fiber tracts • Gray Matter • Contains unmyelinated structures • Cell bodies, dendrites ...
... • Contains myelinated axons • Considered fiber tracts • Gray Matter • Contains unmyelinated structures • Cell bodies, dendrites ...
Nervous_System_Neurons
... SENSORY NEURONS (AFFERENT) – emerge from the skin or sense organs, carry impulses to spinal cord and brain ...
... SENSORY NEURONS (AFFERENT) – emerge from the skin or sense organs, carry impulses to spinal cord and brain ...
SI October 7, 2008
... electron transport proteins, they move from a high energy to a low energy state. This energy is used to build an H+ concentration gradient that is high in the intermembrane space and low in the matrix. As hydrogen ions flow back down their concentration gradient and into the matrix, they turn a “wat ...
... electron transport proteins, they move from a high energy to a low energy state. This energy is used to build an H+ concentration gradient that is high in the intermembrane space and low in the matrix. As hydrogen ions flow back down their concentration gradient and into the matrix, they turn a “wat ...
Action Potentials
... • After the action potential, it is impossible to stimulate the cell membrane to reach another action potential. • Potassium channels are slow to close so too many K+ ions diffuse out of the neurone. • This makes the cell more negative than -70mV, which is the resting potential. • This is called the ...
... • After the action potential, it is impossible to stimulate the cell membrane to reach another action potential. • Potassium channels are slow to close so too many K+ ions diffuse out of the neurone. • This makes the cell more negative than -70mV, which is the resting potential. • This is called the ...
Student Worksheets
... signal will continue to pass down the neuron. If the graded potential is smaller than the threshold, then an action potential will not occur and the signal will be stopped. Now, as the signal travels through the axon, it will attenuate further. At each node of Ranvier including the axon hillock, the ...
... signal will continue to pass down the neuron. If the graded potential is smaller than the threshold, then an action potential will not occur and the signal will be stopped. Now, as the signal travels through the axon, it will attenuate further. At each node of Ranvier including the axon hillock, the ...
Ch12.Nervous.Tissue
... • If axons alone are destroyed, cell bodies often survive & axons may regenerate – PNS macrophages invade & destroy axon distal to the injury • Schwann cells form regeneration tube • Axon filaments grow peripherally from injured site ...
... • If axons alone are destroyed, cell bodies often survive & axons may regenerate – PNS macrophages invade & destroy axon distal to the injury • Schwann cells form regeneration tube • Axon filaments grow peripherally from injured site ...
Neuro Summary Lecture
... by perineurium ◦ Bundles of fascicles form a nerve ◦ Nerves are surrounded by epineurium ...
... by perineurium ◦ Bundles of fascicles form a nerve ◦ Nerves are surrounded by epineurium ...
Unit IV-D Outline
... away from the cell body and send them either to other neurons or to effectors, range in length from less than a centimeter to more than one meter f. Schwann cells – produce layers of a white, fatty substance called myelin which covers the axon, gaps between neighboring cells are called nodes of Ranv ...
... away from the cell body and send them either to other neurons or to effectors, range in length from less than a centimeter to more than one meter f. Schwann cells – produce layers of a white, fatty substance called myelin which covers the axon, gaps between neighboring cells are called nodes of Ranv ...
Chapter 14-Nervous Tissue
... Copyright © McGraw-Hill Education. Permission required for reproduction or display. ...
... Copyright © McGraw-Hill Education. Permission required for reproduction or display. ...
The Nervous System
... How are motor neurons different from sensory neurons? How are neuroglial cells different from typical nerve cells? Name all four types of neuroglial cells and indicate the one that provides immune protection. What is the name of the small spaces that exist between the neurons? Can you give an exampl ...
... How are motor neurons different from sensory neurons? How are neuroglial cells different from typical nerve cells? Name all four types of neuroglial cells and indicate the one that provides immune protection. What is the name of the small spaces that exist between the neurons? Can you give an exampl ...
Nervous System Part 1
... 2. Autonomic Nervous System = Involuntary Regulates the activity of the smooth and cardiac muscles and glands. ...
... 2. Autonomic Nervous System = Involuntary Regulates the activity of the smooth and cardiac muscles and glands. ...
session 29 - E-Learning/An-Najah National University
... Neurons, also called nerve cells, are highly specialized to transmit messages (nerve impulses) from one part of the body to another. Although neurons differ structurally, they have many common features (Figure 7.4). All have a cell body, which contains the nucleus and is the metabolic center of the ...
... Neurons, also called nerve cells, are highly specialized to transmit messages (nerve impulses) from one part of the body to another. Although neurons differ structurally, they have many common features (Figure 7.4). All have a cell body, which contains the nucleus and is the metabolic center of the ...
Supporting cells - Mount Carmel Academy
... 2. Autonomic nervous system = involuntary Regulates the activity of the smooth and cardiac muscles and glands. ...
... 2. Autonomic nervous system = involuntary Regulates the activity of the smooth and cardiac muscles and glands. ...
The Nervous System
... LO 3.45 The student is able to describe how nervous systems transmit information. LO 3.46 The student is able to describe how the vertebrate brain integrates information to produce a response. LO 3.47 The student is able to create a visual representation of complex nervous systems to describe/explai ...
... LO 3.45 The student is able to describe how nervous systems transmit information. LO 3.46 The student is able to describe how the vertebrate brain integrates information to produce a response. LO 3.47 The student is able to create a visual representation of complex nervous systems to describe/explai ...
Node of Ranvier
The nodes of Ranvier also known as myelin sheath gaps, are the gaps (approximately 1 micrometer in length) formed between the myelin sheaths generated by different cells. A myelin sheath is a many-layered coating, largely composed of a fatty substance called myelin, that wraps around the axon of a neuron and very efficiently insulates it. At nodes of Ranvier, the axonal membrane is uninsulated and, therefore, capable of generating electrical activity.