Membrane potential moves toward the K equilibrium
... Some higher functions only exist in one hemisphere - unilateral (eg language in left hemisphere only). PNS – cutting of an axon leads to sprouting from the cut end in order to re-establish a connection – i.e. it can regenerate, although this is not always successful as the connections can get mixed ...
... Some higher functions only exist in one hemisphere - unilateral (eg language in left hemisphere only). PNS – cutting of an axon leads to sprouting from the cut end in order to re-establish a connection – i.e. it can regenerate, although this is not always successful as the connections can get mixed ...
Answers to Mastering Concepts Questions
... Neurotransmitters are released from terminals on axons in response to an action potential. These chemical messengers diffuse across space between neurons and bind to receptors on the receiving cell membrane. Neurotransmitter binding alters the permeability of the membrane in a way that stimulates or ...
... Neurotransmitters are released from terminals on axons in response to an action potential. These chemical messengers diffuse across space between neurons and bind to receptors on the receiving cell membrane. Neurotransmitter binding alters the permeability of the membrane in a way that stimulates or ...
Additional Nervous System Notes
... • Contain rhodopsin – visual pigment made up of protein (opsin) and retinal (made from vitamin A) – Light falling on rhodopsin causes reversible change in shape – called bleaching – This generates an action potential that is carried to visual cortex of brain via optic nerve • Groups of rods may pass ...
... • Contain rhodopsin – visual pigment made up of protein (opsin) and retinal (made from vitamin A) – Light falling on rhodopsin causes reversible change in shape – called bleaching – This generates an action potential that is carried to visual cortex of brain via optic nerve • Groups of rods may pass ...
action potential
... local membrane depolarization, above threshold level, by stimulus causes ‘voltage gated’ Na+ pores to open; [Na+] rushes inside outside causing a spike of depolarization (increase of membrane potential to +40mV) e. refractory period 3-4 msec period after action potential where neuron is unresponsiv ...
... local membrane depolarization, above threshold level, by stimulus causes ‘voltage gated’ Na+ pores to open; [Na+] rushes inside outside causing a spike of depolarization (increase of membrane potential to +40mV) e. refractory period 3-4 msec period after action potential where neuron is unresponsiv ...
Sens1-General
... 2. Each modality has a discrete pathway to the brain. 3. The specific sensation and location of stimulus perceived is determined by area of brain activated. 4. ‘Intensity’ is coded by frequency of action potentials and number of receptors activated. ...
... 2. Each modality has a discrete pathway to the brain. 3. The specific sensation and location of stimulus perceived is determined by area of brain activated. 4. ‘Intensity’ is coded by frequency of action potentials and number of receptors activated. ...
chapter – 21
... 4. Name the divisions of autonomic nervous system? A. Sympathetic and parasympathetic. 5. What are neurotransmitters? A. Neurotransmitters are biochemical’s secreted by terminal of one neuron for transmitting impulse to the next neuron. 6. What is synaptic knob? A. Each axon terminates as a bulb lik ...
... 4. Name the divisions of autonomic nervous system? A. Sympathetic and parasympathetic. 5. What are neurotransmitters? A. Neurotransmitters are biochemical’s secreted by terminal of one neuron for transmitting impulse to the next neuron. 6. What is synaptic knob? A. Each axon terminates as a bulb lik ...
neuro jeopardy
... A membrane maintains its resting potential mainly due to _________. a. the sodium-potassium pump b. chemically gated sodium channels c. potassium leak channels d. calcium leak channels BACK TO GAME ...
... A membrane maintains its resting potential mainly due to _________. a. the sodium-potassium pump b. chemically gated sodium channels c. potassium leak channels d. calcium leak channels BACK TO GAME ...
PowerPoint version
... 1. Which of the following maintains resting potential--the difference in electrical charge inside and outside a neuron membrane that enables the cell to transmit a signal? a. charges that pull sodium and potassium through the membrane b. opening of sodium and potassium channels in the membrane. c. t ...
... 1. Which of the following maintains resting potential--the difference in electrical charge inside and outside a neuron membrane that enables the cell to transmit a signal? a. charges that pull sodium and potassium through the membrane b. opening of sodium and potassium channels in the membrane. c. t ...
chapt10_holes_lecture_animation
... with an action potential (nerve impulse) • A nerve impulse is conducted whenever a stimulus of threshold intensity or above is applied to an axon • All impulses carried on an axon are the same strength ...
... with an action potential (nerve impulse) • A nerve impulse is conducted whenever a stimulus of threshold intensity or above is applied to an axon • All impulses carried on an axon are the same strength ...
Chapter 9 Nervous
... K ions are transferred into cell within cytoplasm. This is threshold potential. The permeability of the cell membrane increases, allowing Na to rush into the cell. Cells interior takes a positive charge. (Called depolarization) Depolarization sweeps down the neuron, making the impulse or action pote ...
... K ions are transferred into cell within cytoplasm. This is threshold potential. The permeability of the cell membrane increases, allowing Na to rush into the cell. Cells interior takes a positive charge. (Called depolarization) Depolarization sweeps down the neuron, making the impulse or action pote ...
Single Unit Recording
... electrode introduced into the brain of a living animal will detect electrical activity that is generated by the neurons adjacent to the electrode tip. If the electrode is a microelectrode, with a tip size of 3 to 10 micrometers, the electrode will often isolate the activity of a single neuron. The a ...
... electrode introduced into the brain of a living animal will detect electrical activity that is generated by the neurons adjacent to the electrode tip. If the electrode is a microelectrode, with a tip size of 3 to 10 micrometers, the electrode will often isolate the activity of a single neuron. The a ...
Chapter 24
... 3. __________ neurons transmit information to the major integrating centers where information is processed. A) Internuncial B) Motor C) Sensory D) Association E) Efferent ...
... 3. __________ neurons transmit information to the major integrating centers where information is processed. A) Internuncial B) Motor C) Sensory D) Association E) Efferent ...
The Nervous System
... A single neuron may branch many times a tits end plate (axon terminals) and join (make connections with) many different neurons Small vesicles containing chemicals called neurotransmitters are located in the end plates of axons. When the nerve impulse reaches the end of the axon it causes the ...
... A single neuron may branch many times a tits end plate (axon terminals) and join (make connections with) many different neurons Small vesicles containing chemicals called neurotransmitters are located in the end plates of axons. When the nerve impulse reaches the end of the axon it causes the ...
The Nervous System
... ensues, depolarizing the cell and causing the VM to increase. This is the rising phase of an AP. • Eventually, the Na+ channel will have inactivated and the K+ channels will be open. Now, K+ effluxes and repolarization occurs. This is the falling phase. – K+ channels are slow to open and slow to clo ...
... ensues, depolarizing the cell and causing the VM to increase. This is the rising phase of an AP. • Eventually, the Na+ channel will have inactivated and the K+ channels will be open. Now, K+ effluxes and repolarization occurs. This is the falling phase. – K+ channels are slow to open and slow to clo ...
action potentials - Zanichelli online per la scuola
... neurotransmitter ACh when voltage-gated Ca2+ channels open and Ca2+ enters the axon terminal. Vesicles release ACh into the synaptic cleft by exocytosis, ACh diffuses across the cleft and binds to receptors on the motor end plate. ...
... neurotransmitter ACh when voltage-gated Ca2+ channels open and Ca2+ enters the axon terminal. Vesicles release ACh into the synaptic cleft by exocytosis, ACh diffuses across the cleft and binds to receptors on the motor end plate. ...
Chemical Transmission BETWEEN Neurons
... (dendrites, cell body, axon, terminal buttons, synaptic vesicles, and receptor sites) ...
... (dendrites, cell body, axon, terminal buttons, synaptic vesicles, and receptor sites) ...
How Neurons Communicate - Computing Science and Mathematics
... • They may be depolarising, hyperpolarising or make no change to the membrane potential • The receptor ion channels pass potassium or chloride ions – Equilibrium potential is near threshold (just above or below) ...
... • They may be depolarising, hyperpolarising or make no change to the membrane potential • The receptor ion channels pass potassium or chloride ions – Equilibrium potential is near threshold (just above or below) ...
eating spaghetti!
... bubbles in the diagram contain chemicals that pour out in the axon terminal of one neuron, cross the synapse, and trigger a nerve impulse in the second neuron. The electrical signal is changing from positive to negative, and it moves the nerve impulse along a neuron. Neurons are in a fiber-like bund ...
... bubbles in the diagram contain chemicals that pour out in the axon terminal of one neuron, cross the synapse, and trigger a nerve impulse in the second neuron. The electrical signal is changing from positive to negative, and it moves the nerve impulse along a neuron. Neurons are in a fiber-like bund ...
Information Processing in the Central Nervous System
... across the membrane reaches a particular threshold. • Finally, some receptors are both ligand- and voltage-gated. For example, the NMDA (N-methyl-D-aspartate) receptor is activated by glutamate. However, the channel is blocked by a magnesium (Mg2+) ion that is ejected when the local membrane is depo ...
... across the membrane reaches a particular threshold. • Finally, some receptors are both ligand- and voltage-gated. For example, the NMDA (N-methyl-D-aspartate) receptor is activated by glutamate. However, the channel is blocked by a magnesium (Mg2+) ion that is ejected when the local membrane is depo ...
Lesson 3 Brain Communication
... • They receive messages from other nerve cells and send it through the neuron. • The have DENDRITIC RECEPTORS on the ends: • Receivers on the end of each dendrite which catch the chemicals as they jump from the previous neuron. They then send the message down the dendrites. ...
... • They receive messages from other nerve cells and send it through the neuron. • The have DENDRITIC RECEPTORS on the ends: • Receivers on the end of each dendrite which catch the chemicals as they jump from the previous neuron. They then send the message down the dendrites. ...
Chapter 11 Notes
... In many cases, a number of neurons come together at a junction Often, when this occurs, more than one of the neurons bringing a message into the junction must be active to produce an action potential in the neuron leaving the junction Summation is the effect produced by the accumulation of neurotran ...
... In many cases, a number of neurons come together at a junction Often, when this occurs, more than one of the neurons bringing a message into the junction must be active to produce an action potential in the neuron leaving the junction Summation is the effect produced by the accumulation of neurotran ...
The Central Nervous System
... In many cases, a number of neurons come together at a junction Often, when this occurs, more than one of the neurons bringing a message into the junction must be active to produce an action potential in the neuron leaving the junction Summation is the effect produced by the accumulation of neurotran ...
... In many cases, a number of neurons come together at a junction Often, when this occurs, more than one of the neurons bringing a message into the junction must be active to produce an action potential in the neuron leaving the junction Summation is the effect produced by the accumulation of neurotran ...
Cells of the Nervous System
... Neuron: its physiology What makes neurons different from other cells? Neurons process and transmit electrical impulses Neuron’s cell membrane is electrically charged (interior is more negative) Neurons influence each other’s charge (‘communicate’) ...
... Neuron: its physiology What makes neurons different from other cells? Neurons process and transmit electrical impulses Neuron’s cell membrane is electrically charged (interior is more negative) Neurons influence each other’s charge (‘communicate’) ...
The Resting Potential II
... of charge carriers), electromotive force (the force that drives the fluxes), and conductance current (I) equals the product of conductance (g) and driving force (E) I = g E this is Ohm's law expressed in terms of transmembrane ionic currents (g is the inverse of resistance (i.e., g = ...
... of charge carriers), electromotive force (the force that drives the fluxes), and conductance current (I) equals the product of conductance (g) and driving force (E) I = g E this is Ohm's law expressed in terms of transmembrane ionic currents (g is the inverse of resistance (i.e., g = ...
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.