5-2_NeurotransmRelease_BenseM
... neurons, and that are released from the cells, act via specific receptors, coupled to the membrane of postsynaptic target, structure and modify the electric and metabolic conditions of the affected cells. Main stages of neurotransmitter release: 1. When the action potential comes down the axon and r ...
... neurons, and that are released from the cells, act via specific receptors, coupled to the membrane of postsynaptic target, structure and modify the electric and metabolic conditions of the affected cells. Main stages of neurotransmitter release: 1. When the action potential comes down the axon and r ...
Chapter 33
... chemically gated potassium channel. When opened, potassium ions leave the cell which increases the negative charge and inhibits the start of an action potential. ...
... chemically gated potassium channel. When opened, potassium ions leave the cell which increases the negative charge and inhibits the start of an action potential. ...
Nervous System
... [Na+] greater outside nerve fiber. • Resting Potential- slight excess of negative charge inside membrane from outward diffusion of K+ • Action Potential- portion of membrane becomes momentarily permeable to Na+ ions (flow inward), accompanied by an outward flow of K+ ...
... [Na+] greater outside nerve fiber. • Resting Potential- slight excess of negative charge inside membrane from outward diffusion of K+ • Action Potential- portion of membrane becomes momentarily permeable to Na+ ions (flow inward), accompanied by an outward flow of K+ ...
Amyotrophic Lateral Sclerosis
... No cure has yet been found for ALS Riluzole (Rilutek) is believed to reduce damage ...
... No cure has yet been found for ALS Riluzole (Rilutek) is believed to reduce damage ...
1 Absolute refractory period a. Time during which a second
... CONTAIN CSF, CEREBRAL VESSELS,ARACHNOID GRANULATION. ...
... CONTAIN CSF, CEREBRAL VESSELS,ARACHNOID GRANULATION. ...
Neural Anatomy and Function
... twitch and 180 fast twitch) • As the pectoralis major muscle contracts the GTO in the pectoralis major are stimulated • They stimulate a sensory nerve leading to the CNS • In the CNS, the sensory nerve synapses with a motor nerve that will inhibit (relax) the pectoralis major muscle • The man is una ...
... twitch and 180 fast twitch) • As the pectoralis major muscle contracts the GTO in the pectoralis major are stimulated • They stimulate a sensory nerve leading to the CNS • In the CNS, the sensory nerve synapses with a motor nerve that will inhibit (relax) the pectoralis major muscle • The man is una ...
Sensory and Motor Systems
... People that use ASL as their first language use Broca’s and Wernicke’s as we do! So they are not necessarily for say auditory processing They are for language Only we have ‘em ...
... People that use ASL as their first language use Broca’s and Wernicke’s as we do! So they are not necessarily for say auditory processing They are for language Only we have ‘em ...
Nervous and Endocrine System
... Dendrites – receive the nerve impulse Nucleus – controls all activities of the cell Axon Terminals release neurotransmitters into the synapse Nerve impulses travel from the dendrite through the cell to the axon terminal (one direction only) Nerve impulses travel through the cell as electrica ...
... Dendrites – receive the nerve impulse Nucleus – controls all activities of the cell Axon Terminals release neurotransmitters into the synapse Nerve impulses travel from the dendrite through the cell to the axon terminal (one direction only) Nerve impulses travel through the cell as electrica ...
cranial nerve ix: glossopharyngeal nerve
... 1. In this role, the Vagus is "stealing" some of the innervation from the Spinal Accessory (XI). Hence in this case the Vagus is actually innervating striated rather than smooth muscle. 2. VISCERAL MOTOR (GVE): Parasympathetics to the Thoracic and Abdominal viscera. 1. The Vagus serves no Parasympat ...
... 1. In this role, the Vagus is "stealing" some of the innervation from the Spinal Accessory (XI). Hence in this case the Vagus is actually innervating striated rather than smooth muscle. 2. VISCERAL MOTOR (GVE): Parasympathetics to the Thoracic and Abdominal viscera. 1. The Vagus serves no Parasympat ...
Prac T12 - studylib.net
... an equal amount of positive and negative ions on either side of the membrane an equal amount of positive ions on either side of the membrane an excess of positive ions inside and an excess of negative ions outside an excess of negative ions inside and an excess of negative ions outside Which of the ...
... an equal amount of positive and negative ions on either side of the membrane an equal amount of positive ions on either side of the membrane an excess of positive ions inside and an excess of negative ions outside an excess of negative ions inside and an excess of negative ions outside Which of the ...
Peripheral Nerve Diseases
... reduced) with progressive reduction of amplitude. Axonal change: Reduced amplitude or absence of response to stimulation with mild slowing of conduction velocity Localized compression of nerve: Slowing conduction in region of block e.g. Over the elbow when ulnar nerve is compressed there. ...
... reduced) with progressive reduction of amplitude. Axonal change: Reduced amplitude or absence of response to stimulation with mild slowing of conduction velocity Localized compression of nerve: Slowing conduction in region of block e.g. Over the elbow when ulnar nerve is compressed there. ...
Unit 8 Nervous System
... Changes when concentrations of ions across the membrane change and permeability of membrane to ions changes Signals used to receive, integrate, and send information ...
... Changes when concentrations of ions across the membrane change and permeability of membrane to ions changes Signals used to receive, integrate, and send information ...
Nervous and Immune Systems
... Taste, smell, solute concentration (osmoreceptors), glucose, oxygen, carbon dioxide Photoreceptors: receptors that respond to different wavelengths of light ...
... Taste, smell, solute concentration (osmoreceptors), glucose, oxygen, carbon dioxide Photoreceptors: receptors that respond to different wavelengths of light ...
summing-up - Zanichelli online per la scuola
... from the nerves to the brain and, in case of danger, makes an appropriate response known as a simple reflex arc. ...
... from the nerves to the brain and, in case of danger, makes an appropriate response known as a simple reflex arc. ...
Document
... • Feature abstraction—identification of more complex aspects and several stimulus properties • Quality discrimination—the ability to identify submodalities of a sensation (e.g., sweet or sour tastes) • Pattern recognition—recognition of familiar or significant patterns in stimuli (e.g., the melody i ...
... • Feature abstraction—identification of more complex aspects and several stimulus properties • Quality discrimination—the ability to identify submodalities of a sensation (e.g., sweet or sour tastes) • Pattern recognition—recognition of familiar or significant patterns in stimuli (e.g., the melody i ...
Jan 7, 2015. PASSIVE ELECTRICAL PROPERTIES OF MEMBRANES
... From example trace given in class; Measure time constant Measure change in membrane potential resulting from a given injection of current Calculate input resistance Calculate total capacitance of cell membrane Estimate diameter of the cell ...
... From example trace given in class; Measure time constant Measure change in membrane potential resulting from a given injection of current Calculate input resistance Calculate total capacitance of cell membrane Estimate diameter of the cell ...
Nervous System
... Changes are caused by three events Depolarization – the inside of the membrane becomes less negative Repolarization – the membrane returns to its resting membrane potential Hyperpolarization – the inside of the membrane becomes more negative than the resting potential ...
... Changes are caused by three events Depolarization – the inside of the membrane becomes less negative Repolarization – the membrane returns to its resting membrane potential Hyperpolarization – the inside of the membrane becomes more negative than the resting potential ...
PowerPoint
... taken up again by the axon terminal and recycled, or they may simply diffuse away. • NERVE GAS prevents enzymes from breaking down neurotransmitters, as a result muscles in the respiratory and nervous system becomes paralyzed. ...
... taken up again by the axon terminal and recycled, or they may simply diffuse away. • NERVE GAS prevents enzymes from breaking down neurotransmitters, as a result muscles in the respiratory and nervous system becomes paralyzed. ...
Slide ()
... Short-term sensitization of the gill-withdrawal reflex in Aplysia. A. Sensitization of the gill-withdrawal reflex is produced by applying a noxious stimulus to another part of the body, such as the tail. A shock to the tail activates tail sensory neurons that excite facilitating (modulatory) interne ...
... Short-term sensitization of the gill-withdrawal reflex in Aplysia. A. Sensitization of the gill-withdrawal reflex is produced by applying a noxious stimulus to another part of the body, such as the tail. A shock to the tail activates tail sensory neurons that excite facilitating (modulatory) interne ...
E4-D5-12
... 3. What are the Parasympathetic Motor Functions for III, VII, IX, and X? 4. Why doesn’t CN I, II and VIII have a field to fill? They are primary sensory ...
... 3. What are the Parasympathetic Motor Functions for III, VII, IX, and X? 4. Why doesn’t CN I, II and VIII have a field to fill? They are primary sensory ...
Sending Signals Notes
... taken up again by the axon terminal and recycled, or they may simply diffuse away. • NERVE GAS prevents enzymes from breaking down neurotransmitters, as a result muscles in the respiratory and nervous system becomes paralyzed. ...
... taken up again by the axon terminal and recycled, or they may simply diffuse away. • NERVE GAS prevents enzymes from breaking down neurotransmitters, as a result muscles in the respiratory and nervous system becomes paralyzed. ...
Nerve activates contraction - Silver Falls School District
... 1. Irritability –respond to stimuli ...
... 1. Irritability –respond to stimuli ...
Powerpoint slides
... About -70 mV Selectively allowing certain ions in With stimulation Na+ is allowed in ...
... About -70 mV Selectively allowing certain ions in With stimulation Na+ is allowed in ...
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.