Sxn 2 Objectives
... Define graded potential. Identify where and how a graded potential can occur on a neuron. Give examples based on specific ion movements. Define threshold and action potential. Identify where and how an action potential can occur on a neuron. Compare and contrast graded potentials with action p ...
... Define graded potential. Identify where and how a graded potential can occur on a neuron. Give examples based on specific ion movements. Define threshold and action potential. Identify where and how an action potential can occur on a neuron. Compare and contrast graded potentials with action p ...
File
... Most of the metabolic activity of the cell takes place in the cell body. Dendrite-Extension of the cell body of a neuron that carries impulses from the environment or from other neurons toward the cell body. Axon-Long fiber that carries impulses away from the cell body of a neuron. The axon ends in ...
... Most of the metabolic activity of the cell takes place in the cell body. Dendrite-Extension of the cell body of a neuron that carries impulses from the environment or from other neurons toward the cell body. Axon-Long fiber that carries impulses away from the cell body of a neuron. The axon ends in ...
The nervous system
... The synapse is a junctional space between a nerve cell and another cell or effector is called a synapse. Messages travel within the neuron as an electrical action potential. The space between two cells is known as the synaptic cleft. To cross the synaptic cleft requires the actions of neurotransmitt ...
... The synapse is a junctional space between a nerve cell and another cell or effector is called a synapse. Messages travel within the neuron as an electrical action potential. The space between two cells is known as the synaptic cleft. To cross the synaptic cleft requires the actions of neurotransmitt ...
Chapter 3: The Biological Bases of Behavior
... Communication in the Nervous System • Glia – structural support and insulation • Neurons – communication – Soma – cell body – Dendrites – receive – Axon – transmit away – Myelin sheath – speeds up transmission – Terminal Button – end of axon; secretes neurotransmitters – Neurotransmitters – chemica ...
... Communication in the Nervous System • Glia – structural support and insulation • Neurons – communication – Soma – cell body – Dendrites – receive – Axon – transmit away – Myelin sheath – speeds up transmission – Terminal Button – end of axon; secretes neurotransmitters – Neurotransmitters – chemica ...
Introductory Assignment to the Nervous System
... organ coordinates most of the activities of the nervous system? Through what part of the body do most messages reach or leave the brain? The brain and spinal cord form what part of the nervous system? What connects the central nervous system to muscles and sense organs throughout the body? W ...
... organ coordinates most of the activities of the nervous system? Through what part of the body do most messages reach or leave the brain? The brain and spinal cord form what part of the nervous system? What connects the central nervous system to muscles and sense organs throughout the body? W ...
Chapter 48 and 49 Name_______________________________
... Action potentials travel in only one direction: toward the synaptic terminals ...
... Action potentials travel in only one direction: toward the synaptic terminals ...
02QUIZ02 ( 44K)
... 7. Though there is no single "control center" for emotions, their regulation is primarily attributed to the brain region known as the: A) limbic system. B) reticular formation. C) brainstem. D) cerebral cortex. ...
... 7. Though there is no single "control center" for emotions, their regulation is primarily attributed to the brain region known as the: A) limbic system. B) reticular formation. C) brainstem. D) cerebral cortex. ...
Autonomic Nervous System
... c. adrenal medulla - both types are close to spinal cord, so sympathetic preganglionic fibers are short - sympathetic preganglionic fibers branch and may contact 10-20 postganglionic neurons = divergence - sympathetic preganglionic axons have 4 potential destinations: KNOW FIG. 16.5 reach sympat ...
... c. adrenal medulla - both types are close to spinal cord, so sympathetic preganglionic fibers are short - sympathetic preganglionic fibers branch and may contact 10-20 postganglionic neurons = divergence - sympathetic preganglionic axons have 4 potential destinations: KNOW FIG. 16.5 reach sympat ...
10-1
... 25. This neurotransmitter is produced in quite a few areas of the brain, including the substantia nigra and the ventral tegmental area. It is also a neurohormone released by the hypothalamus. Its principle hormonal role is to inhibit the release of prolactin from the anterior lobe of the pituitary. ...
... 25. This neurotransmitter is produced in quite a few areas of the brain, including the substantia nigra and the ventral tegmental area. It is also a neurohormone released by the hypothalamus. Its principle hormonal role is to inhibit the release of prolactin from the anterior lobe of the pituitary. ...
Brain and Nervous System
... called astroglia) have numerous projections that anchor neurons to their blood supply. They regulate the external chemical environment of neurons by removing excess ions, notably potassium, and recycling neurotransmitters released during synaptic transmission. Oligodendrocytes are cells that coat ax ...
... called astroglia) have numerous projections that anchor neurons to their blood supply. They regulate the external chemical environment of neurons by removing excess ions, notably potassium, and recycling neurotransmitters released during synaptic transmission. Oligodendrocytes are cells that coat ax ...
T/F
... T/F A single cell can stretch all the way from your spine to your toe. T/F Messages travel in the brain by means of electricity. T/F A brain cell can send out hundreds of messages each second, and manage to catch some rest in between. ...
... T/F A single cell can stretch all the way from your spine to your toe. T/F Messages travel in the brain by means of electricity. T/F A brain cell can send out hundreds of messages each second, and manage to catch some rest in between. ...
Know Your Neurons: How to Classify Different Types of Neurons in
... Do these basic classes account for all types of neurons? Well, just about every neuron in the human nervous system should fall into one these broad categories—but these categories do not capture the true diversity of the nervous system. Not even close. If you really want to catalogue neurons in thei ...
... Do these basic classes account for all types of neurons? Well, just about every neuron in the human nervous system should fall into one these broad categories—but these categories do not capture the true diversity of the nervous system. Not even close. If you really want to catalogue neurons in thei ...
Unit – M Neuron, Impulse Generation, and Reflex Arc Structures and
... When the axon or dendrite is stimulated, sodium gates open which allows some Na+ to enter the axoplasm (interior). Now, the inside becomes more positive than the outside by 40 mv. This is called the Upswing Phase of the action potential. The charge changes from –60 mv to +40 mv. The change is calle ...
... When the axon or dendrite is stimulated, sodium gates open which allows some Na+ to enter the axoplasm (interior). Now, the inside becomes more positive than the outside by 40 mv. This is called the Upswing Phase of the action potential. The charge changes from –60 mv to +40 mv. The change is calle ...
Nervous - Anoka-Hennepin School District
... Motor (efferent) neurons carry impulses from the CNS to the muscles. Interneurons make connections within the CNS (brain and spinal cord). ...
... Motor (efferent) neurons carry impulses from the CNS to the muscles. Interneurons make connections within the CNS (brain and spinal cord). ...
Slide 1
... Diverse molecular families control the growth and guidance of developing axons. A. A large family of classical cadherins promote cell and axonal adhesion, primarily through homophilic interactions between cadherin molecules on adjacent neurons. Adhesive interactions are mediated through interactions ...
... Diverse molecular families control the growth and guidance of developing axons. A. A large family of classical cadherins promote cell and axonal adhesion, primarily through homophilic interactions between cadherin molecules on adjacent neurons. Adhesive interactions are mediated through interactions ...
ADAM Nervous System Ion Channels Use this program only if you
... Use this program only if you need to review the differences between active and passive cell channels and voltage-gated and chemically-gated channels. Membrane Potential 1. What causes the outside surface of the cell membrane to be more positive? 2. The resting membrane potential in a neuron results ...
... Use this program only if you need to review the differences between active and passive cell channels and voltage-gated and chemically-gated channels. Membrane Potential 1. What causes the outside surface of the cell membrane to be more positive? 2. The resting membrane potential in a neuron results ...
Nervous System – Ch 7
... axons in brain and spinal cord Astrocytes: found between neurons and blood vessels; provide structural support, join parts, regulate nutrient and ion concentration in tissues, form scar tissue Ependymal cells: form epithelial-like membrane to cover specialized brain parts (choroid plexuses) and form ...
... axons in brain and spinal cord Astrocytes: found between neurons and blood vessels; provide structural support, join parts, regulate nutrient and ion concentration in tissues, form scar tissue Ependymal cells: form epithelial-like membrane to cover specialized brain parts (choroid plexuses) and form ...
Chapter 6 - Sensory - Austin Community College
... Motor neurons are the final common pathway by which various regions of the CNS exert control over skeletal muscle activity The areas of the CNS that influence skeletal muscle activity by acting through the motor neurons are the spinal cord, motor regions of the cortex, basal nuclei, cerebellum, and ...
... Motor neurons are the final common pathway by which various regions of the CNS exert control over skeletal muscle activity The areas of the CNS that influence skeletal muscle activity by acting through the motor neurons are the spinal cord, motor regions of the cortex, basal nuclei, cerebellum, and ...
The Nervous System - Kirchner-WHS
... trough the body and up the spinal cord towards the brain, which then transmits and processes information. ...
... trough the body and up the spinal cord towards the brain, which then transmits and processes information. ...
Nervous System - Mrs. Riggs Online
... • cerebrospinal fluid circulates through fibers of arachnoid; cushions brain • glial cells: support and insulate nerve tissue • neurons: actual nerve cells; long fibers branch out from cell bodies • cell body: contains nucleus and most of nerve cell's cytoplasm; found only in brain, spinal cord or i ...
... • cerebrospinal fluid circulates through fibers of arachnoid; cushions brain • glial cells: support and insulate nerve tissue • neurons: actual nerve cells; long fibers branch out from cell bodies • cell body: contains nucleus and most of nerve cell's cytoplasm; found only in brain, spinal cord or i ...
Axon
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An axon (from Greek ἄξων áxōn, axis), also known as a nerve fibre, is a long, slender projection of a nerve cell, or neuron, that typically conducts electrical impulses away from the neuron's cell body. The function of the axon is to transmit information to different neurons, muscles and glands. In certain sensory neurons (pseudounipolar neurons), such as those for touch and warmth, the electrical impulse travels along an axon from the periphery to the cell body, and from the cell body to the spinal cord along another branch of the same axon. Axon dysfunction causes many inherited and acquired neurological disorders which can affect both the peripheral and central neurons.An axon is one of two types of protoplasmic protrusions that extrude from the cell body of a neuron, the other type being dendrites. Axons are distinguished from dendrites by several features, including shape (dendrites often taper while axons usually maintain a constant radius), length (dendrites are restricted to a small region around the cell body while axons can be much longer), and function (dendrites usually receive signals while axons usually transmit them). All of these rules have exceptions, however.Some types of neurons have no axon and transmit signals from their dendrites. No neuron ever has more than one axon; however in invertebrates such as insects or leeches the axon sometimes consists of several regions that function more or less independently of each other. Most axons branch, in some cases very profusely.Axons make contact with other cells—usually other neurons but sometimes muscle or gland cells—at junctions called synapses. At a synapse, the membrane of the axon closely adjoins the membrane of the target cell, and special molecular structures serve to transmit electrical or electrochemical signals across the gap. Some synaptic junctions appear partway along an axon as it extends—these are called en passant (""in passing"") synapses. Other synapses appear as terminals at the ends of axonal branches. A single axon, with all its branches taken together, can innervate multiple parts of the brain and generate thousands of synaptic terminals.