Name: Date: Grade / Section: _____ Neurons Questions Notes 1
... environment and change it into a nerve impulse 2. ____________________ carry nerve impulses from one nerve to another 3. _____________ neurons send impulses to muscles, causing them to move in response Explain what each neuron does in the picture when the person puts her hand near the flame: Sensory ...
... environment and change it into a nerve impulse 2. ____________________ carry nerve impulses from one nerve to another 3. _____________ neurons send impulses to muscles, causing them to move in response Explain what each neuron does in the picture when the person puts her hand near the flame: Sensory ...
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 ...
principles and techniques of the examination of the trigeminal nerve
... normal sensation. As is observed in plotting relative defects in the visual field, there is often a graduated cutaneous sensory loss with margins that vary with the degree of stimulation. Consequently, heavier pinpricks are likely to show a smaller field of sensory loss than are light pinpricks. Whe ...
... normal sensation. As is observed in plotting relative defects in the visual field, there is often a graduated cutaneous sensory loss with margins that vary with the degree of stimulation. Consequently, heavier pinpricks are likely to show a smaller field of sensory loss than are light pinpricks. Whe ...
Bio 211 Lecture 18
... • absolute - time when threshold stimulus does not start another action potential (Na+ channels inactivated) • relative – time when stronger threshold stimulus can start another action potential (Na+ channels restored, K+ channels begin ...
... • absolute - time when threshold stimulus does not start another action potential (Na+ channels inactivated) • relative – time when stronger threshold stimulus can start another action potential (Na+ channels restored, K+ channels begin ...
Organization of the Nervous System and the Neuron
... No contact between neurons except at electrical synapses (escape reflexes, retina, heart) Axonal terminals release neurotransmitters which cause depolarization of next neuron Neurotransmitter is removed from synapse by reuptake at axonal terminal or enzymatic breakdown ...
... No contact between neurons except at electrical synapses (escape reflexes, retina, heart) Axonal terminals release neurotransmitters which cause depolarization of next neuron Neurotransmitter is removed from synapse by reuptake at axonal terminal or enzymatic breakdown ...
31.1 The Neuron
... your senses. In your notes write out the path it would take from outside the body and through the aspects of the nervous system. ...
... your senses. In your notes write out the path it would take from outside the body and through the aspects of the nervous system. ...
Neuron Function
... Channels differ in the stimulus that causes them to open and how long they stay open Voltage gated channels - respond to specific voltage changes across the PM; imp in AP Ligand gated channels - open when particular molecules bind to the channel; imp in chemical communication between neurons acro ...
... Channels differ in the stimulus that causes them to open and how long they stay open Voltage gated channels - respond to specific voltage changes across the PM; imp in AP Ligand gated channels - open when particular molecules bind to the channel; imp in chemical communication between neurons acro ...
Nervous System
... back again as an efferent impulse. The receptive nerve endings for autonomic reflexes are located in the viscera. ...
... back again as an efferent impulse. The receptive nerve endings for autonomic reflexes are located in the viscera. ...
The Nervous System - Marblehead High School
... Axon - long fiber ending at the terminals that carries impulses away from the cell body Myelin sheath - protective membrane surrounding the axon ...
... Axon - long fiber ending at the terminals that carries impulses away from the cell body Myelin sheath - protective membrane surrounding the axon ...
The Nervous System - Catherine Huff`s Site
... Neuron Function: Depolarization and Repolarization • Resting state - when neuron is not stimulated • But, not truly resting – still working to maintain resting state • Sodium-Potassium Pump – proteins in the neuron’s cell membrane pump sodium ions out and potassium ions into the cell • Sodium can’t ...
... Neuron Function: Depolarization and Repolarization • Resting state - when neuron is not stimulated • But, not truly resting – still working to maintain resting state • Sodium-Potassium Pump – proteins in the neuron’s cell membrane pump sodium ions out and potassium ions into the cell • Sodium can’t ...
The Nervous System
... Neuron Function: Depolarization and Repolarization • Resting state - when neuron is not stimulated • But, not truly resting – still working to maintain resting state • Sodium-Potassium Pump – proteins in the neuron’s cell membrane pump sodium ions out and potassium ions into the cell • Sodium can’t ...
... Neuron Function: Depolarization and Repolarization • Resting state - when neuron is not stimulated • But, not truly resting – still working to maintain resting state • Sodium-Potassium Pump – proteins in the neuron’s cell membrane pump sodium ions out and potassium ions into the cell • Sodium can’t ...
NEUROMUSCULAR ELECTRICAL STIMULATION
... the electrophysical principles related to therapeutic currents; Given a therapeutic current, describe the characteristics of the current; List and ratify the factors that affect current conductivity; Identify the essential features of each NMES, apply in a safe and correct manner ...
... the electrophysical principles related to therapeutic currents; Given a therapeutic current, describe the characteristics of the current; List and ratify the factors that affect current conductivity; Identify the essential features of each NMES, apply in a safe and correct manner ...
Chapter 43
... • Respond to hormones and neurotransmitters • Action potentials – transient disruptions, signals that propagate down the neuron • Voltage-gated channels (Na+ channel and K+ channel) • Action potential “jumps” from node of Ranvier to next node ...
... • Respond to hormones and neurotransmitters • Action potentials – transient disruptions, signals that propagate down the neuron • Voltage-gated channels (Na+ channel and K+ channel) • Action potential “jumps” from node of Ranvier to next node ...
Introduction to Sense Organs
... sound, etc.) into nerve signals – sense organ, gasoline engine, light bulb are all transducers • receptor potential – small, local electrical change on a receptor cell brought about by an initial stimulus • results in release of neurotransmitter or a volley of action potentials that generates nerve ...
... sound, etc.) into nerve signals – sense organ, gasoline engine, light bulb are all transducers • receptor potential – small, local electrical change on a receptor cell brought about by an initial stimulus • results in release of neurotransmitter or a volley of action potentials that generates nerve ...
Chapter 12 - FacultyWeb
... between cells/electrical synapses Chemical synapses involve direct connection between cells/chemical synapses Electrical synapses always use ACh/both are equally abundant ...
... between cells/electrical synapses Chemical synapses involve direct connection between cells/chemical synapses Electrical synapses always use ACh/both are equally abundant ...
cranial nerve ppt
... Sensations from posterior 1/3 of tongue including taste Damage results in loss of bitter and sour taste and impaired swallowing, blood pressure anomalies (with CN X). ...
... Sensations from posterior 1/3 of tongue including taste Damage results in loss of bitter and sour taste and impaired swallowing, blood pressure anomalies (with CN X). ...
Neuroanatomy Handout #1: The Motor Neuron
... • At each node of Ranvier, the action potential is regenerated by a chain of positively charged ions pushed along by the previous segment. ...
... • At each node of Ranvier, the action potential is regenerated by a chain of positively charged ions pushed along by the previous segment. ...
File
... binds to receptors which have an inhibitory effect, reducing rate and strength of the muscle contraction. by enzyme degradation and re-uptake ...
... binds to receptors which have an inhibitory effect, reducing rate and strength of the muscle contraction. by enzyme degradation and re-uptake ...
file - Athens Academy
... allow the current to flow easily between the extracellular fluid and the axon. allow action potentials to develop. allow for saltatory conduction of the action potential. All of these are true of nodes of Ranvier. ...
... allow the current to flow easily between the extracellular fluid and the axon. allow action potentials to develop. allow for saltatory conduction of the action potential. All of these are true of nodes of Ranvier. ...
Biology 3201
... This causes outside of membrane to have an abundance of + charges compared to inside. The inside of the membrane is negative compared to the outside (this is helped by the (-)’ly charged proteins, etc. on the inside) The “sodium-potassium” pump pulls 2 K+ ions in for 3 Na+ ions sent out. This furthe ...
... This causes outside of membrane to have an abundance of + charges compared to inside. The inside of the membrane is negative compared to the outside (this is helped by the (-)’ly charged proteins, etc. on the inside) The “sodium-potassium” pump pulls 2 K+ ions in for 3 Na+ ions sent out. This furthe ...
Nervous System Notes
... times more numerous • Unlike neurons, they can multiply and divide in mature nervous tissue ...
... times more numerous • Unlike neurons, they can multiply and divide in mature nervous tissue ...
File
... At rest Na+ is being pumped out of the cell and K+ is being pumped in. This creates an negative internal and positive external membrane charge. 8. Define the following. a. Graded potential-depolarizing or hyperpolarizing of membrane without a threshold value, effect on membrane potential decreases w ...
... At rest Na+ is being pumped out of the cell and K+ is being pumped in. This creates an negative internal and positive external membrane charge. 8. Define the following. a. Graded potential-depolarizing or hyperpolarizing of membrane without a threshold value, effect on membrane potential decreases w ...
Rheobase
Rheobase is a measure of membrane excitability. In neuroscience, rheobase is the minimal current amplitude of infinite duration (in a practical sense, about 300 milliseconds) that results in the depolarization threshold of the cell membranes being reached, such as an action potential or the contraction of a muscle. In Greek, the root ""rhe"" translates to current or flow, and ""basi"" means bottom or foundation: thus the rheobase is the minimum current that will produce an action potential or muscle contraction.Rheobase can be best understood in the context of the strength-duration relationship (Fig. 1). The ease with which a membrane can be stimulated depends on two variables: the strength of the stimulus, and the duration for which the stimulus is applied. These variables are inversely related: as the strength of the applied current increases, the time required to stimulate the membrane decreases (and vice versa) to maintain a constant effect. Mathematically, rheobase is equivalent to half the current that needs to be applied for the duration of chronaxie, which is a strength-duration time constant that corresponds to the duration of time that elicits a response when the nerve is stimulated at twice rheobasic strength.The strength-duration curve was first discovered by G. Weiss in 1901, but it was not until 1909 that Louis Lapicque coined the term ""rheobase"". Many studies are being conducted in relation to rheobase values and the dynamic changes throughout maturation and between different nerve fibers. In the past strength-duration curves and rheobase determinations were used to assess nerve injury; today, they play a role in clinical identification of many neurological pathologies, including as Diabetic neuropathy, CIDP, Machado-Joseph Disease, and ALS.