(580.422) Lecture 7, Synaptic Transmission
... capacitance? The data at right were obtained from mast cells, which release secretory vesicles that are larger than typical neurotransmitter vesicles. Levitan & Kaczmarek, 2002 ...
... capacitance? The data at right were obtained from mast cells, which release secretory vesicles that are larger than typical neurotransmitter vesicles. Levitan & Kaczmarek, 2002 ...
Neurology - wsscience
... Chemical synapses differ from electric synapses because chemical synapses: Contain integral proteins Involve a neurotransmitter Involve direct physical contact between cells Propagate action potentials quickly and efficiently ...
... Chemical synapses differ from electric synapses because chemical synapses: Contain integral proteins Involve a neurotransmitter Involve direct physical contact between cells Propagate action potentials quickly and efficiently ...
Respiratory and Nervous Systems
... The neurotransmitters bind with specific receptors on the postsynaptic membrane. Depolarization occurs on the postsynaptic membrane if threshold is reached. The neurotransmitter is destroyed by an enzyme (ex. acetylcholinesterase) or reabsorbed back into the presynaptic membrane. ...
... The neurotransmitters bind with specific receptors on the postsynaptic membrane. Depolarization occurs on the postsynaptic membrane if threshold is reached. The neurotransmitter is destroyed by an enzyme (ex. acetylcholinesterase) or reabsorbed back into the presynaptic membrane. ...
01.22.10 Lecture 5: Membrane transport
... Ion channels have ion selectivity - they only allow passage of specific molecules ...
... Ion channels have ion selectivity - they only allow passage of specific molecules ...
Nerves, Hormones and Homeostasis
... The neurotransmitter diffuses across the synaptic cleft and binds to the receptors in the post synaptic membrane. 5. The receptors are transmitter-gated ion channels which open when the neurotransmitter binds. Sodium and other positively charged ions diffuse into the post-synaptic membrane. 6. Depo ...
... The neurotransmitter diffuses across the synaptic cleft and binds to the receptors in the post synaptic membrane. 5. The receptors are transmitter-gated ion channels which open when the neurotransmitter binds. Sodium and other positively charged ions diffuse into the post-synaptic membrane. 6. Depo ...
Electrochemical Impulse
... There are many things that can cause a change in membrane potential of a neuron. Specialized receptors exist in your skin and organs that can change membrane potential due to environmental changes. These receptors will open channels allowing cations like sodium into the cell body. ...
... There are many things that can cause a change in membrane potential of a neuron. Specialized receptors exist in your skin and organs that can change membrane potential due to environmental changes. These receptors will open channels allowing cations like sodium into the cell body. ...
Action Potential
... Neurons don’t want most ions to flow across the concentration gradient because that would cause constant electrical activity and eventual neuron death… ...
... Neurons don’t want most ions to flow across the concentration gradient because that would cause constant electrical activity and eventual neuron death… ...
Nervous System - De Anza College
... neuron (presynaptic cell) to the receiving neuron (postsynaptic cell) Synaptic terminals ...
... neuron (presynaptic cell) to the receiving neuron (postsynaptic cell) Synaptic terminals ...
Biopsychology 2012 – sec 002
... from one node of Ranvier to the next. It allows for more rapid action potential conduction and requires less energy. Where are neurotransmitters produced? 1. Small neurotransmitter molecules are synthesized in the terminal buttons via synthetic enzymes and precursor molecules (ex., acetylcholine). 2 ...
... from one node of Ranvier to the next. It allows for more rapid action potential conduction and requires less energy. Where are neurotransmitters produced? 1. Small neurotransmitter molecules are synthesized in the terminal buttons via synthetic enzymes and precursor molecules (ex., acetylcholine). 2 ...
Tayler
... potassium is on the inside Resting potential gives the neuron a break Action potential: Sodium ions move inside the membrane Depolarization: as sodium rushes back into the cell the positive sodium ions raise the charge inside of the cell from negative to positive Refractory period puts every ...
... potassium is on the inside Resting potential gives the neuron a break Action potential: Sodium ions move inside the membrane Depolarization: as sodium rushes back into the cell the positive sodium ions raise the charge inside of the cell from negative to positive Refractory period puts every ...
Diapositive 1
... 3. 3. They bind selectively to the CB 1 type of cannabinoid receptor, which is mainly located on certain presynaptic tecminals. CB1 receptors are G-protein-coupled receptors, and their main effect is to reduce the opening of presynaptic calcium channels. With its calcium channels inhibited, the abil ...
... 3. 3. They bind selectively to the CB 1 type of cannabinoid receptor, which is mainly located on certain presynaptic tecminals. CB1 receptors are G-protein-coupled receptors, and their main effect is to reduce the opening of presynaptic calcium channels. With its calcium channels inhibited, the abil ...
Power Point
... During an action potential, depolarization can change the membrane potential from –70 mV to about +30 mV. During repolarization the membrane potential returns to –70 mV. The nerve fiber cannot be stimulated again until repolarization is complete. This period is called the refractory period. If the s ...
... During an action potential, depolarization can change the membrane potential from –70 mV to about +30 mV. During repolarization the membrane potential returns to –70 mV. The nerve fiber cannot be stimulated again until repolarization is complete. This period is called the refractory period. If the s ...
Unit 3-2 Nervous System Pt 2 Notes File
... Flood of Na+ rushes into cell Incoming Na + causes a Large depolarization (inside becomes positive) Closes voltage gated Na+-channels, Opens voltage-gated K+-channels Triggers AP further along the axon 2. Repolarizing phase - END of Action potential signaling Voltage-gated Na+ channels Clo ...
... Flood of Na+ rushes into cell Incoming Na + causes a Large depolarization (inside becomes positive) Closes voltage gated Na+-channels, Opens voltage-gated K+-channels Triggers AP further along the axon 2. Repolarizing phase - END of Action potential signaling Voltage-gated Na+ channels Clo ...
The Nervous System
... dendrites of the next or between a neuron and an effector synapse between neuron and muscle cell is called a neuromuscular junction or motor end plate ...
... dendrites of the next or between a neuron and an effector synapse between neuron and muscle cell is called a neuromuscular junction or motor end plate ...
Nervous and Immune Systems
... 2. Sodium ions (Na+) rush into the axon causing depolarization in the neuron and initiating an action potential 3. Depolarization moves down the axon causing more voltage-gated sodium channels to open 4. Another action potential occurs further down the axon resulting in the transmission of the signa ...
... 2. Sodium ions (Na+) rush into the axon causing depolarization in the neuron and initiating an action potential 3. Depolarization moves down the axon causing more voltage-gated sodium channels to open 4. Another action potential occurs further down the axon resulting in the transmission of the signa ...
M.learning.hccs.edu
... A) chemically-regulated potassium channels are open and potassium is diffusing out of the cell. B) more calcium ions than usual diffuse into the neuron. C) chemically-regulated sodium channels are open and sodium is diffusing into the cell. D) the neuron is hyperpolarized. E) more potassium ions tha ...
... A) chemically-regulated potassium channels are open and potassium is diffusing out of the cell. B) more calcium ions than usual diffuse into the neuron. C) chemically-regulated sodium channels are open and sodium is diffusing into the cell. D) the neuron is hyperpolarized. E) more potassium ions tha ...
The Nervous System Nervous system links sensory receptors and
... between neurons - axon/dendrite junctions, between neurons and muscles or gland cells Synaptic cleft - narrow gap between cells Chemical signals cross synaptic cleft by diffusion ...
... between neurons - axon/dendrite junctions, between neurons and muscles or gland cells Synaptic cleft - narrow gap between cells Chemical signals cross synaptic cleft by diffusion ...
Chapter 3 Synapses
... Release of Neurotransmitters Molecules Exocytosis • Release of neurotransmitter molecules • Action potential causes positive calcium ions to enter the terminal *This depolarizes the terminal ...
... Release of Neurotransmitters Molecules Exocytosis • Release of neurotransmitter molecules • Action potential causes positive calcium ions to enter the terminal *This depolarizes the terminal ...
Ch. 48 - 49
... Name the three types of neurons and their functions. Which make up the CNS and the PNS? Describe the main parts of a neuron. Describe what happens in a Reflex Arc. How are Nodes of Ranvier and Saltatory conduction related? What occurs at the synapse? ...
... Name the three types of neurons and their functions. Which make up the CNS and the PNS? Describe the main parts of a neuron. Describe what happens in a Reflex Arc. How are Nodes of Ranvier and Saltatory conduction related? What occurs at the synapse? ...
9.01 Exam #1 September 27, 2004 30 multiple
... refractory period (when no amount of pressing the lever will produce another flush) is set by: a) the inactivation of voltage insensitive potassium channels b) the inactivation of voltage gated calcium channels c) the inactivation of voltage gated delayed rectifier potassium channels d) the inactiva ...
... refractory period (when no amount of pressing the lever will produce another flush) is set by: a) the inactivation of voltage insensitive potassium channels b) the inactivation of voltage gated calcium channels c) the inactivation of voltage gated delayed rectifier potassium channels d) the inactiva ...
2 - IS MU
... synaptic vesicles initiates their fusion with the presynaptic membrane and neurotransmitter exocytosis. The membranes of vesicles are recycled. At neuromuscular junctions, the arrival of a nerve impulse releases about 300 vesicles (approx. 40 000 acetylcholine molecules in each), which raises the ac ...
... synaptic vesicles initiates their fusion with the presynaptic membrane and neurotransmitter exocytosis. The membranes of vesicles are recycled. At neuromuscular junctions, the arrival of a nerve impulse releases about 300 vesicles (approx. 40 000 acetylcholine molecules in each), which raises the ac ...
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.