Nerve Cell Flashcards
... Repolarization: Enough sodium ions flow out of the cell to make the membrane potential become negative Action Potential = depolarization + repolarization The nerve impulse arrives at the synaptic knob of the presynaptic cell, then the neurotransmitter is released. The NT binds to receptors on the po ...
... Repolarization: Enough sodium ions flow out of the cell to make the membrane potential become negative Action Potential = depolarization + repolarization The nerve impulse arrives at the synaptic knob of the presynaptic cell, then the neurotransmitter is released. The NT binds to receptors on the po ...
THE NERVOUS SYSTEM - Tamalpais Union High School District
... • Generally inhibitory • Prevents the receptor nerve from being overstimulated • When it accumulates it has a sedative effect ...
... • Generally inhibitory • Prevents the receptor nerve from being overstimulated • When it accumulates it has a sedative effect ...
KKDP 3: The role of the neuron (dendrites, axon, myelin and
... An axon is a single, tubelike, extension. Most neurons have only one axon but many axons have branches that allow a message to be sent to multiple cells. Axons vary in length; for example, some axons extend over a metre from your spine to your big toe, others are as small as the width of a sin ...
... An axon is a single, tubelike, extension. Most neurons have only one axon but many axons have branches that allow a message to be sent to multiple cells. Axons vary in length; for example, some axons extend over a metre from your spine to your big toe, others are as small as the width of a sin ...
chapter 11-nerve tissue
... 1. This charge difference creates a small voltage along the neuron’s membrane. 2. Normal RMP is typically about –70mV. The negative sign indicates that the inside of the neuron is more negative than the outside of the neuron. a. Neurons create impulses by changing this RMP. b. What leads to the Form ...
... 1. This charge difference creates a small voltage along the neuron’s membrane. 2. Normal RMP is typically about –70mV. The negative sign indicates that the inside of the neuron is more negative than the outside of the neuron. a. Neurons create impulses by changing this RMP. b. What leads to the Form ...
Immune System Barriers Skin Outer surface is dry and oily, most
... Sympathetic nervous system: acts on organs that prepare the body for stressful activity, axons found nerves that originate from middle and lower portions of spinal cord, synapse occurs in ganglia that are near spinal cord Parasympathetic nervous system: dominates during maintenance activities that a ...
... Sympathetic nervous system: acts on organs that prepare the body for stressful activity, axons found nerves that originate from middle and lower portions of spinal cord, synapse occurs in ganglia that are near spinal cord Parasympathetic nervous system: dominates during maintenance activities that a ...
Nervous System - Buck Mountain Central School
... • A nerve impulse is a series of action potentials • In myelinated neurons, APs only occur at the • Nodes of Ranvier • The threshold potential refers to the minimum stimulus required to generate an AP in a neuron (this can vary amongst different neurons) • APs are “all-or-none” meaning ...
... • A nerve impulse is a series of action potentials • In myelinated neurons, APs only occur at the • Nodes of Ranvier • The threshold potential refers to the minimum stimulus required to generate an AP in a neuron (this can vary amongst different neurons) • APs are “all-or-none” meaning ...
The Biology of Mind Chapter 2 PowerPoint
... 3. Which type of cell communicates within the central nervous system and processes information between incoming and outgoing messages? ANSWER A. B. C. D. ...
... 3. Which type of cell communicates within the central nervous system and processes information between incoming and outgoing messages? ANSWER A. B. C. D. ...
Nervous System Chapter 7
... neurons do not touch each other. (synaptic cleft is between them.) 7. myelin – whitish fatty material, protects and insulates fibers, increasing transmission rate of nerve impulses. 8. Schwann cells – wrap around axon forming myelin sheath. 9. Neurilemma – part of schwann cell external to myelin s ...
... neurons do not touch each other. (synaptic cleft is between them.) 7. myelin – whitish fatty material, protects and insulates fibers, increasing transmission rate of nerve impulses. 8. Schwann cells – wrap around axon forming myelin sheath. 9. Neurilemma – part of schwann cell external to myelin s ...
A- A- A- K+ A - How Your Brain Works
... • Advantage: the feedback current injection allows action potentials to travel along axons for considerable distances without loss of signal. (Fresh Na+ currents make up for leakage). • Disadvantage: action potentials are “all or nothing”. They cannot transmit information by their amplitude, so grad ...
... • Advantage: the feedback current injection allows action potentials to travel along axons for considerable distances without loss of signal. (Fresh Na+ currents make up for leakage). • Disadvantage: action potentials are “all or nothing”. They cannot transmit information by their amplitude, so grad ...
What are Computational Neuroscience and Neuroinformatics
... of medium-term and long-term memory, localising in the hippocampus. Models of working memory, relying on theories of network oscillations and persistent activity, have been built to capture some features of the prefrontal cortex in context-related memory. One of the major problems in biological memo ...
... of medium-term and long-term memory, localising in the hippocampus. Models of working memory, relying on theories of network oscillations and persistent activity, have been built to capture some features of the prefrontal cortex in context-related memory. One of the major problems in biological memo ...
What is the neuron`s resting potential?
... • A neuron produces an action potential or “fires” when it generates and conducts an electrochemical signal. • A given neuron receives electrochemical signals from thousands of adjacent neurons. The terminal buttons of adjacent neurons “synapse” onto the dendrites or cell body of the target neuron. ...
... • A neuron produces an action potential or “fires” when it generates and conducts an electrochemical signal. • A given neuron receives electrochemical signals from thousands of adjacent neurons. The terminal buttons of adjacent neurons “synapse” onto the dendrites or cell body of the target neuron. ...
Information Processing in Motor Learning
... Efferent neurons Motor Carry signals from the brain Sport Books Publisher ...
... Efferent neurons Motor Carry signals from the brain Sport Books Publisher ...
6419982_1441921514
... regions of the brain. Although their functional significance in the brain is unknown, it has been speculated that they may allow a two-way transmission of impulses (in contrast to chemical synapses, which are always oneway). ...
... regions of the brain. Although their functional significance in the brain is unknown, it has been speculated that they may allow a two-way transmission of impulses (in contrast to chemical synapses, which are always oneway). ...
bio 342 human physiology
... equal to the driving force favoring diffusion based on a concentration gradient. When these two driving forces are equal and opposite, the membrane potential reaches an equilibrium at which the voltage is called So which compartment corresponds to intracellular fluid? ...
... equal to the driving force favoring diffusion based on a concentration gradient. When these two driving forces are equal and opposite, the membrane potential reaches an equilibrium at which the voltage is called So which compartment corresponds to intracellular fluid? ...
Biology Option Review Section E
... Animal responses can be affected by natural selection in regards to higher rates of survival, as is the case with the Loggerhead turtles who are, after birth and successful survival until reproduction can occur, able to instinctively remember the beach they were born on, known as natal beaches, and ...
... Animal responses can be affected by natural selection in regards to higher rates of survival, as is the case with the Loggerhead turtles who are, after birth and successful survival until reproduction can occur, able to instinctively remember the beach they were born on, known as natal beaches, and ...
weiten6_PPT03
... electrical activity. This change in voltage, called an action potential, travels along the axon. (c) Biochemical changes propel the action potential along the axon. An action potential begins when sodium gates in the membrane of an axon open, permitting positively charged sodium ions to flow into th ...
... electrical activity. This change in voltage, called an action potential, travels along the axon. (c) Biochemical changes propel the action potential along the axon. An action potential begins when sodium gates in the membrane of an axon open, permitting positively charged sodium ions to flow into th ...
video slide - ScienceToGo
... Inhibitory postsynaptic potentials (IPSPs) are hyperpolarizations that move the membrane potential farther from threshold After release, the neurotransmitter ...
... Inhibitory postsynaptic potentials (IPSPs) are hyperpolarizations that move the membrane potential farther from threshold After release, the neurotransmitter ...
Neurotransmitters
... • Synthesized from glutamate by GAD (glutamic acid decarboxylase) • Inactivation = reuptake by nerve terminals for reuse and by glia, where it undergoes conversion to glutamine, return to neuron terminal (where it can be reconverted to Glu and then to GABA) ...
... • Synthesized from glutamate by GAD (glutamic acid decarboxylase) • Inactivation = reuptake by nerve terminals for reuse and by glia, where it undergoes conversion to glutamine, return to neuron terminal (where it can be reconverted to Glu and then to GABA) ...
Chapter 4 lec 2
... Metabotropic Glutamate Receptor – a category of metabotropic receptors that are sensitive to glutamate. ...
... Metabotropic Glutamate Receptor – a category of metabotropic receptors that are sensitive to glutamate. ...
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 ...
Chemical synapse
Chemical synapses are specialized junctions through which neurons signal to each other and to non-neuronal cells such as those in muscles or glands. Chemical synapses allow neurons to form circuits within the central nervous system. They are crucial to the biological computations that underlie perception and thought. They allow the nervous system to connect to and control other systems of the body.At a chemical synapse, one neuron releases neurotransmitter molecules into a small space (the synaptic cleft) that is adjacent to another neuron. The neurotransmitters are kept within small sacs called vesicles, and are released into the synaptic cleft by exocytosis. These molecules then bind to receptors on the postsynaptic cell's side of the synaptic cleft. Finally, the neurotransmitters must be cleared from the synapse through one of several potential mechanisms including enzymatic degradation or re-uptake by specific transporters either on the presynaptic cell or possibly by neuroglia to terminate the action of the transmitter.The adult human brain is estimated to contain from 1014 to 5 × 1014 (100–500 trillion) synapses. Every cubic millimeter of cerebral cortex contains roughly a billion (short scale, i.e. 109) of them.The word ""synapse"" comes from ""synaptein"", which Sir Charles Scott Sherrington and colleagues coined from the Greek ""syn-"" (""together"") and ""haptein"" (""to clasp""). Chemical synapses are not the only type of biological synapse: electrical and immunological synapses also exist. Without a qualifier, however, ""synapse"" commonly means chemical synapse.