Nervous Tissue - MrsSconyersAnatomy
... Smooth muscle, cardiac muscle, developing embryo advantages: Faster – don’t have to “jump the gap” Synchronization – allows groups of cell’s to work together – heart beating ...
... Smooth muscle, cardiac muscle, developing embryo advantages: Faster – don’t have to “jump the gap” Synchronization – allows groups of cell’s to work together – heart beating ...
Action Potential
... - Either a complete action potential that propagates along the axon or no response at all - once generated, moves along the axon without a drop or gain in amplitude 3. Always followed by a refactory period ...
... - Either a complete action potential that propagates along the axon or no response at all - once generated, moves along the axon without a drop or gain in amplitude 3. Always followed by a refactory period ...
2015-2016_1Semester_Exam2_140116
... Changes of the membrane potential upon binding of GABA to GABA-A receptors From -30mV to -65mV Changes in the firing rate of motoneurons, if the innervated muscle fibers are suddenly elongated: wtf ...
... Changes of the membrane potential upon binding of GABA to GABA-A receptors From -30mV to -65mV Changes in the firing rate of motoneurons, if the innervated muscle fibers are suddenly elongated: wtf ...
Neural Pathways
... outside 3. channels then automatically close very quickly, but this causes the neighboring channels to open 4. it proceeds like a wave along the membrane to the tip of the axon 5. then it arrives at the synapse ...
... outside 3. channels then automatically close very quickly, but this causes the neighboring channels to open 4. it proceeds like a wave along the membrane to the tip of the axon 5. then it arrives at the synapse ...
Synaptic Transmission
... •How a neuron communicates with another neuron and the effects of drugs on this process. •Types of Neurotransmitters ...
... •How a neuron communicates with another neuron and the effects of drugs on this process. •Types of Neurotransmitters ...
NERVES
... and open or close when a specific channel when a specific chemical binds to the channel › Voltage-gated ion channels- are found in axons and open or close when the membrane potential changes ...
... and open or close when a specific channel when a specific chemical binds to the channel › Voltage-gated ion channels- are found in axons and open or close when the membrane potential changes ...
The Nervous System: Neural Tissue
... b. The knob contains many tiny sacs called synaptic vesicles that contain a neurotransmitter. 3. Postsynaptic neuron – neuron conducting impulses away from the synapse a. The end of the dendrite has a receptor membrane. b. The membrane bears neurotransmitter receptors . 4. Synaptic Cleft – space bet ...
... b. The knob contains many tiny sacs called synaptic vesicles that contain a neurotransmitter. 3. Postsynaptic neuron – neuron conducting impulses away from the synapse a. The end of the dendrite has a receptor membrane. b. The membrane bears neurotransmitter receptors . 4. Synaptic Cleft – space bet ...
Synaptic Transmission and Neurotransmitters
... strength of stimulus that produced it; action potential is ungraded – Action potential obeys all or none law: occurs at full strength or not at all – Action potential is nondecremental: does NOT lose strength at each successive point (local potentials do degrade) ...
... strength of stimulus that produced it; action potential is ungraded – Action potential obeys all or none law: occurs at full strength or not at all – Action potential is nondecremental: does NOT lose strength at each successive point (local potentials do degrade) ...
Nervous Systems
... • Step 2: A stimulus causes some Na+ ion channels to open allowing Na+ to diffuse through the membrane. This causes the membrane to be depolarized. The depolarization causes even more Na+ ion channels to open (positive feedback) until a threshold is reached in the membrane potential • Step 3: Once t ...
... • Step 2: A stimulus causes some Na+ ion channels to open allowing Na+ to diffuse through the membrane. This causes the membrane to be depolarized. The depolarization causes even more Na+ ion channels to open (positive feedback) until a threshold is reached in the membrane potential • Step 3: Once t ...
Nervous System
... • Two ways to increase velocity of conduction: – Increase diameter of axon; reduces resistance to current flow; found primarily in invertebrates – Axon is myelinated; impulse jumps from node to node (Nodes of Ranvier – the only site of action potentials) = saltatory conduction – one action potential ...
... • Two ways to increase velocity of conduction: – Increase diameter of axon; reduces resistance to current flow; found primarily in invertebrates – Axon is myelinated; impulse jumps from node to node (Nodes of Ranvier – the only site of action potentials) = saltatory conduction – one action potential ...
Nerve Cell Physiology
... presynaptic membrane, resulting in Ca+ influx into the presynaptic terminal. ...
... presynaptic membrane, resulting in Ca+ influx into the presynaptic terminal. ...
Lecture_29_noquiz
... which the concentration and electrical gradients acting on that ion balance out. • The Nernst equation is a formula that converts energy stored in a concentration gradient to the energy stored as an electrical potential. This is calculated independently for each ion. ...
... which the concentration and electrical gradients acting on that ion balance out. • The Nernst equation is a formula that converts energy stored in a concentration gradient to the energy stored as an electrical potential. This is calculated independently for each ion. ...
Terms being described
... 11. It’s another name for motor neurons because of their direction of conduction. 13. It’s another name for sensory neurons because of their direction of conduction. 15. It’s the ability of a potential change to spread along the axon that is analogous to the conduction of electricity by a wire. 17. ...
... 11. It’s another name for motor neurons because of their direction of conduction. 13. It’s another name for sensory neurons because of their direction of conduction. 15. It’s the ability of a potential change to spread along the axon that is analogous to the conduction of electricity by a wire. 17. ...
a14b NeuroPhysII
... Threshold stimulus—strong enough to push the membrane potential toward and beyond threshold (Membrane is depolarized by 15 to 20 mV) AP is an all-or-none phenomenon—action potentials either happen completely, or not at all All action potentials are alike and are independent of stimulus intensi ...
... Threshold stimulus—strong enough to push the membrane potential toward and beyond threshold (Membrane is depolarized by 15 to 20 mV) AP is an all-or-none phenomenon—action potentials either happen completely, or not at all All action potentials are alike and are independent of stimulus intensi ...
Nervous Tissue - Chiropractor Manhattan | Chiropractor New
... cannot be initiated, even with a very strong stimulus. Relative refractory period – an action potential can be initiated, but only with a larger than normal stimulus. ...
... cannot be initiated, even with a very strong stimulus. Relative refractory period – an action potential can be initiated, but only with a larger than normal stimulus. ...
Nervous system lecture 1
... potentials at the axon hillock can bring about an action potential or inhibit the generation of the action potential. – Spatial: stimulation by many neurons at one time. – Temporal: increased numbers of impulses per minute. ...
... potentials at the axon hillock can bring about an action potential or inhibit the generation of the action potential. – Spatial: stimulation by many neurons at one time. – Temporal: increased numbers of impulses per minute. ...
CHAPTER 48 NEURONS, SYNAPSES, AND SIGNALING I. Student
... Student misconceptions The sequence of events during the generation of an action potential may be confusing to some students. Students may have some or all of these common misconceptions: ...
... Student misconceptions The sequence of events during the generation of an action potential may be confusing to some students. Students may have some or all of these common misconceptions: ...
AP Psychology - HOMEWORK 9
... The extension of a neuron that transmits information to other neurons is the: (2 pts) ...
... The extension of a neuron that transmits information to other neurons is the: (2 pts) ...
Biosc_48_Chapter_7_part_2_lecture
... Inward flow of Na+ depolarizes the cell, creating an EPSP (excitatory postsynaptic potential). 1) EPSPs occur in the dendrites and cell bodies. 2) EPSPs from the binding of several ACh molecules can be added together to produce greater depolarization summation of graded-potentials 3) This may reac ...
... Inward flow of Na+ depolarizes the cell, creating an EPSP (excitatory postsynaptic potential). 1) EPSPs occur in the dendrites and cell bodies. 2) EPSPs from the binding of several ACh molecules can be added together to produce greater depolarization summation of graded-potentials 3) This may reac ...
“Put that in the Form of a Question, Please!”
... a neuron is more negative on the inside (Na+ ions more prevalent on outside). When in action potential, polarity switches and cell becomes more positive on inside as ion channels open up and Na+ ions flood in? ...
... a neuron is more negative on the inside (Na+ ions more prevalent on outside). When in action potential, polarity switches and cell becomes more positive on inside as ion channels open up and Na+ ions flood in? ...
Study/Review * Nervous System Part 2 * CNS and PNS
... 5. ___________________is a region between an axon terminal and a dendrite or cell body of another neuron 6. The name of an autoimmune demyelination disease characterized by antibodies to myelin is _________________________________ ...
... 5. ___________________is a region between an axon terminal and a dendrite or cell body of another neuron 6. The name of an autoimmune demyelination disease characterized by antibodies to myelin is _________________________________ ...
End-plate potential
End plate potentials (EPPs) are the depolarizations of skeletal muscle fibers caused by neurotransmitters binding to the postsynaptic membrane in the neuromuscular junction. They are called ""end plates"" because the postsynaptic terminals of muscle fibers have a large, saucer-like appearance. When an action potential reaches the axon terminal of a motor neuron, vesicles carrying neurotransmitters (mostly acetylcholine) are exocytosed and the contents are released into the neuromuscular junction. These neurotransmitters bind to receptors on the postsynaptic membrane and lead to its depolarization. In the absence of an action potential, acetylcholine vesicles spontaneously leak into the neuromuscular junction and cause very small depolarizations in the postsynaptic membrane. This small response (~0.5mV) is called a miniature end plate potential (MEPP) and is generated by one acetylcholine-containing vesicle. It represents the smallest possible depolarization which can be induced in a muscle.