THE CENTRAL NERVOUS SYSTEM
... neighbouring neurons, passing the message along. Neurons come in many sizes: e.g. a single sensory neuron from the fingertip has an axon that extends the length of the arm, while neurons within the brain may extend only a few millimetres. Neurons have different shapes depending on what they do. Moto ...
... neighbouring neurons, passing the message along. Neurons come in many sizes: e.g. a single sensory neuron from the fingertip has an axon that extends the length of the arm, while neurons within the brain may extend only a few millimetres. Neurons have different shapes depending on what they do. Moto ...
Nervous System: Spinal Cord and Spinal Nerves
... -axons repair if cut if follow original path -severed nerves do not usually repair: axons do not line up correctly ...
... -axons repair if cut if follow original path -severed nerves do not usually repair: axons do not line up correctly ...
Lab 5: Nervous System I
... • An impulse arrives at the dendrite • When the impulse is strong enough, it depolarizes the membrane and the impulse is transmitted along the axon • When the impulse reaches the axon terminals, the information needs to be converted to another form of energy in order for the information to be transm ...
... • An impulse arrives at the dendrite • When the impulse is strong enough, it depolarizes the membrane and the impulse is transmitted along the axon • When the impulse reaches the axon terminals, the information needs to be converted to another form of energy in order for the information to be transm ...
Chp 8 the senses
... •Sclera = White connective tissue layer seen anteriorly as the “white of the eye” •Cornea –Transparent, central anterior portion –Allows for light to pass through –Repairs itself easily –The only human tissue that can be transplanted without fear of rejection Choroid Layer •Blood-rich nutritive tuni ...
... •Sclera = White connective tissue layer seen anteriorly as the “white of the eye” •Cornea –Transparent, central anterior portion –Allows for light to pass through –Repairs itself easily –The only human tissue that can be transplanted without fear of rejection Choroid Layer •Blood-rich nutritive tuni ...
Human Body Systems - Leon County Schools
... The muscular system is made of three different types of muscle tissue—skeletal muscle, cardiac muscle, and smooth muscle. Skeletal muscle works with the skeletal system and helps you move. Tendons connect skeletal muscles to bones. Skeletal muscle also gives you the strength to lift heavy ...
... The muscular system is made of three different types of muscle tissue—skeletal muscle, cardiac muscle, and smooth muscle. Skeletal muscle works with the skeletal system and helps you move. Tendons connect skeletal muscles to bones. Skeletal muscle also gives you the strength to lift heavy ...
D22 - Viktor`s Notes for the Neurosurgery Resident
... formula to calculate conduction velocity in motor fibers: motor conduction velocity* = distance between two stimulation sites / time difference in latencies. *velocity is so measured only for fastest conducting fibers. N.B. difference in latencies is used to exclude neuromuscular transmission time ...
... formula to calculate conduction velocity in motor fibers: motor conduction velocity* = distance between two stimulation sites / time difference in latencies. *velocity is so measured only for fastest conducting fibers. N.B. difference in latencies is used to exclude neuromuscular transmission time ...
Neuron File
... channels embedded in the membrane to generate intracellular-versus-extracellular concentration differences of ions such as sodium, potassium, chloride, and calcium. Changes in the cross-membrane voltage can alter the function of voltage-dependent ion channels. If the voltage changes by a large enoug ...
... channels embedded in the membrane to generate intracellular-versus-extracellular concentration differences of ions such as sodium, potassium, chloride, and calcium. Changes in the cross-membrane voltage can alter the function of voltage-dependent ion channels. If the voltage changes by a large enoug ...
幻灯片 1
... Department of Anatomy, Histology and Embryology, Shanghai Medical College, Fudan University, Shanghai 200032, China ...
... Department of Anatomy, Histology and Embryology, Shanghai Medical College, Fudan University, Shanghai 200032, China ...
Nerve conduction studies and electromyography
... There is a risk that you may feel slight tenderness where the needle was inserted after an EMG, but this only occurs very occasionally. In very exceptional cases there may be some slight bruising, which resolves quickly. The tests may affect the older generation of pacemakers so if you have a pacema ...
... There is a risk that you may feel slight tenderness where the needle was inserted after an EMG, but this only occurs very occasionally. In very exceptional cases there may be some slight bruising, which resolves quickly. The tests may affect the older generation of pacemakers so if you have a pacema ...
INTEGUMENTARY SYSTEM
... - Endoneurium – Surrounds each axon - Perineurium – Around each fascicle (group of axons) - Epineurium – Tough, Fibrous C.T. around Nerve ...
... - Endoneurium – Surrounds each axon - Perineurium – Around each fascicle (group of axons) - Epineurium – Tough, Fibrous C.T. around Nerve ...
Nervous communication
... A sensory neurone, a relay neurone and a motor neurone. In a reflex (e.g. withdrawing a finger from a hot object) 1.An impulse starts in a receptor 2.then is transmitted to a sensory neurone 3.then to a relay neurone in the brain or spine, 4.then to a motor neurone 5.and finally to an effector for a ...
... A sensory neurone, a relay neurone and a motor neurone. In a reflex (e.g. withdrawing a finger from a hot object) 1.An impulse starts in a receptor 2.then is transmitted to a sensory neurone 3.then to a relay neurone in the brain or spine, 4.then to a motor neurone 5.and finally to an effector for a ...
Neuroglia - wsscience
... 1. Input Zone: the ligand-gated ion channels are activated by neurotransmitters, or ligands, and secreted by presynaptic terminals. This activation creates a postsynaptic potential. 2. Integrative Zone: summates the postsynaptic potentials and initiates an action potential. Action potential depends ...
... 1. Input Zone: the ligand-gated ion channels are activated by neurotransmitters, or ligands, and secreted by presynaptic terminals. This activation creates a postsynaptic potential. 2. Integrative Zone: summates the postsynaptic potentials and initiates an action potential. Action potential depends ...
You submitted this quiz on Tue 6 May 2014 6:55 PM CDT. You got a
... It covers all axons in the central nervous system Inorrect0.00 While the vast majority of neurons are myelinated, a subset of sensory neurons known as C fibers are not. It covers some of the axons in the peripheral nervous system neurons are myelinated. ...
... It covers all axons in the central nervous system Inorrect0.00 While the vast majority of neurons are myelinated, a subset of sensory neurons known as C fibers are not. It covers some of the axons in the peripheral nervous system neurons are myelinated. ...
03/05 PPT
... • Different cells respond to the same guidance cues in different ways • Chemical cues exist at many points along the axon guidance pathway e.g the optic tectum and optic tract ...
... • Different cells respond to the same guidance cues in different ways • Chemical cues exist at many points along the axon guidance pathway e.g the optic tectum and optic tract ...
Brainstem 10
... It has a number of important functions i.e. Respiratory and Cardiovascular centers are located in the medullary and caudal pontine reticular formation. Some reticular neurons have long ascending and descending axons that allow profuse interaction with other neuronal systems. ...
... It has a number of important functions i.e. Respiratory and Cardiovascular centers are located in the medullary and caudal pontine reticular formation. Some reticular neurons have long ascending and descending axons that allow profuse interaction with other neuronal systems. ...
What is RF diathermy?
... piezoelectric crystal. This crystal when exposed to the current will vibrate at a given frequency, expanding and contracting, which produces the necessary compression wave. By using a different frequency the therapist can target tissues at different depths for either healing or destruction, or simpl ...
... piezoelectric crystal. This crystal when exposed to the current will vibrate at a given frequency, expanding and contracting, which produces the necessary compression wave. By using a different frequency the therapist can target tissues at different depths for either healing or destruction, or simpl ...
Nervous System: Nervous Tissue (Chapter 12) Lecture Materials for
... sheath! -1 cell contributes myelin to many ! neighboring axons! -lipid in membrane insulates axon for faster ! action potential conductance! -gaps on axon between processes/myelin = ! Nodes (of Ranvier), necessary to conduct ! impulse! -white, myelinated axons = “white matter”! ...
... sheath! -1 cell contributes myelin to many ! neighboring axons! -lipid in membrane insulates axon for faster ! action potential conductance! -gaps on axon between processes/myelin = ! Nodes (of Ranvier), necessary to conduct ! impulse! -white, myelinated axons = “white matter”! ...
Glial Cells: The Other Cells of the Nervous System
... structure and function two types of astrocytes can be identified: (a) Fibrous astrocytes - these are predominantly present in the white matter and have small cell bodies with numerous extensions. A large number of microfilaments are characteristically present in the cytoplasm of these cells. (Figure ...
... structure and function two types of astrocytes can be identified: (a) Fibrous astrocytes - these are predominantly present in the white matter and have small cell bodies with numerous extensions. A large number of microfilaments are characteristically present in the cytoplasm of these cells. (Figure ...
chapter48
... For every three Na+ pumped out of the cell, two K+ are pumped in. More positive ions are pumped out than in. Neurons have three types of ion channels: 1. Ungated or passive ion channels, which are generally open. E.g., Na+, K+, Cl- and Ca2+ 2. Voltage activated ion channels are kept closed and respo ...
... For every three Na+ pumped out of the cell, two K+ are pumped in. More positive ions are pumped out than in. Neurons have three types of ion channels: 1. Ungated or passive ion channels, which are generally open. E.g., Na+, K+, Cl- and Ca2+ 2. Voltage activated ion channels are kept closed and respo ...
9.01 Exam #1 September 27, 2004 30 multiple
... b) The limit of resolution of the light microscope is 100 nm, whereas the electron microscope has a limit of resolution of 0.1 nm. c) The Golgi stain only stains a small percentage of neurons, and even then not completely; the chances of finding a pair of interconnected neurons is too small to dete ...
... b) The limit of resolution of the light microscope is 100 nm, whereas the electron microscope has a limit of resolution of 0.1 nm. c) The Golgi stain only stains a small percentage of neurons, and even then not completely; the chances of finding a pair of interconnected neurons is too small to dete ...
the exterior, nervous, urinary, and endocrine systems of domestic
... The thyroid gland consists of two connected lobes located on either side of the trachea or windpipe. The production of the hormone thyroxine by the thyroid gland is stimulated by thyrotropic hormones produced by the anterior pituitary gland. Thyroxine controls body metabolism and growth by increasi ...
... The thyroid gland consists of two connected lobes located on either side of the trachea or windpipe. The production of the hormone thyroxine by the thyroid gland is stimulated by thyrotropic hormones produced by the anterior pituitary gland. Thyroxine controls body metabolism and growth by increasi ...
the spinal cord and the influence of its damage on
... might try to regrow and connect to cells they once innervated. An additional problem arises from the fact that the cord environment contains an over-abundance of molecules that actively inhibit axonal regeneration – some of which lie in the myelin itself. Many other inhibitory molecules have now bee ...
... might try to regrow and connect to cells they once innervated. An additional problem arises from the fact that the cord environment contains an over-abundance of molecules that actively inhibit axonal regeneration – some of which lie in the myelin itself. Many other inhibitory molecules have now bee ...
The Brainstem (or brain stem) 4/5/2010
... • Motor neurons located in the ventral horns send their axons out to muscle fibers via the ventral roots. ANS axons also exit via the ventral roots • Although there are sensory nerves and motor nerves that enter and exit the brainstem there are no “dorsal or ventral horns” in the brainstem. ...
... • Motor neurons located in the ventral horns send their axons out to muscle fibers via the ventral roots. ANS axons also exit via the ventral roots • Although there are sensory nerves and motor nerves that enter and exit the brainstem there are no “dorsal or ventral horns” in the brainstem. ...