11 - Karmayog .org
... This impulse is brought about by the movement of chemical ions either into or out of a neuron. - These ions have an electric charge this causes the flow of an electric current. - When it reaches a junction between two neurons (synapse). It causes the release of a neurotransmitters to stimulate the i ...
... This impulse is brought about by the movement of chemical ions either into or out of a neuron. - These ions have an electric charge this causes the flow of an electric current. - When it reaches a junction between two neurons (synapse). It causes the release of a neurotransmitters to stimulate the i ...
Nervous System
... Also allows the action potential to move faster & easier. These are White in color, so heavily myelated cells appear as White Matter. ...
... Also allows the action potential to move faster & easier. These are White in color, so heavily myelated cells appear as White Matter. ...
Test #1 Study Guide
... synaptic cleft- the gap between the two neurons communicating with one another. This is where the neurotransmitters are passed from one neuron to another parts of the neuron soma- Cell Body Dendrites- receives messages Axon- transmits messages away from the cell body to other neurons Axo ...
... synaptic cleft- the gap between the two neurons communicating with one another. This is where the neurotransmitters are passed from one neuron to another parts of the neuron soma- Cell Body Dendrites- receives messages Axon- transmits messages away from the cell body to other neurons Axo ...
Neuro1
... 2) Myelin is a lipid-rich layer surrounding nerve cells (making a myelin sheath). It insulates axons except at their initial and terminal segments and allows faster conductions of impulses through the nerve fiber. Myelin is secreted by Schwann cells in the PNS and oligodendrocytes in the CNS. 3) All ...
... 2) Myelin is a lipid-rich layer surrounding nerve cells (making a myelin sheath). It insulates axons except at their initial and terminal segments and allows faster conductions of impulses through the nerve fiber. Myelin is secreted by Schwann cells in the PNS and oligodendrocytes in the CNS. 3) All ...
4-S2 - L1 (1)
... Fast excitatory responses Excitatory neurotransmitters cause depolarisation of the postsynaptic cell by acting on ligand-gated ion channels. -excitatory postsynaptic potential (EPSP) - depolarisation causes more action potentials ...
... Fast excitatory responses Excitatory neurotransmitters cause depolarisation of the postsynaptic cell by acting on ligand-gated ion channels. -excitatory postsynaptic potential (EPSP) - depolarisation causes more action potentials ...
The Nervous System
... • There are three types of neurons: – Sensory neurons carry impulses from the sense organs to the spinal cord and the brain – Motor neurons carry impulses from the brain and spinal cord to muscles and glands – Interneurons connect sensory and motor neurons and carry impulses between them ...
... • There are three types of neurons: – Sensory neurons carry impulses from the sense organs to the spinal cord and the brain – Motor neurons carry impulses from the brain and spinal cord to muscles and glands – Interneurons connect sensory and motor neurons and carry impulses between them ...
Nerve cells - Dr Magrann
... Sensory (afferent) signals picked up by sensor receptors. They are carried by nerve fibers of PNS to the CNS Motor (efferent) signals are carried away from the CNS. They innervate muscles and glands 1. Receive a signal. Can be any type of stimulus (change in environment, signal from another neuron, ...
... Sensory (afferent) signals picked up by sensor receptors. They are carried by nerve fibers of PNS to the CNS Motor (efferent) signals are carried away from the CNS. They innervate muscles and glands 1. Receive a signal. Can be any type of stimulus (change in environment, signal from another neuron, ...
Academic Half-Day Neurophysiology 101
... Ion channels are transmembrane proteins with hydrophilic pores that, when activated, allow for selective ions to travel down their electrochemical gradient ...
... Ion channels are transmembrane proteins with hydrophilic pores that, when activated, allow for selective ions to travel down their electrochemical gradient ...
Nervous System
... • Found _____ inside the CNS • Connects ___________ (sensory to motor and vise versa) • Typically short dendrites and either long or ...
... • Found _____ inside the CNS • Connects ___________ (sensory to motor and vise versa) • Typically short dendrites and either long or ...
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 ...
Teacher Guide
... neurotransmitter - at a synapse, a chemical released by nerve terminals that binds to receptors on dendrites of neighboring neurons; neurotransmitters relay information across the space between one neuron's nerve terminal and another neuron's dendrites. (Connect the Neurons) occipital lobe - the mos ...
... neurotransmitter - at a synapse, a chemical released by nerve terminals that binds to receptors on dendrites of neighboring neurons; neurotransmitters relay information across the space between one neuron's nerve terminal and another neuron's dendrites. (Connect the Neurons) occipital lobe - the mos ...
Nerve Flash Cards
... How does the signal go through the space? By a chemical transmission. The synaptic knob has vesicles filled with a neurotransmitter that carries the signal. Each type of neuron used particular types of neurotransmitters, so there are 100’s of types. ...
... How does the signal go through the space? By a chemical transmission. The synaptic knob has vesicles filled with a neurotransmitter that carries the signal. Each type of neuron used particular types of neurotransmitters, so there are 100’s of types. ...
CHAPTER 3
... and organization of movements, and to certain aspects of memory. The frontal cortex also contains areas important for language function and some networks of mirror neurons which facilitate learning from watching and copying others. c) The Forebrain: Subcortical Areas: Several structures below the c ...
... and organization of movements, and to certain aspects of memory. The frontal cortex also contains areas important for language function and some networks of mirror neurons which facilitate learning from watching and copying others. c) The Forebrain: Subcortical Areas: Several structures below the c ...
Nervous System Overview
... • 12. What is the refractory period? It is the amount of time it takes for an excitable membrane to be ready for a second stimulus once it returns to its resting state ...
... • 12. What is the refractory period? It is the amount of time it takes for an excitable membrane to be ready for a second stimulus once it returns to its resting state ...
The Nervous System
... 1 – On your own, no notes 2 – On your own, with notes 3 – With partner, no notes 4 - with partner, with notes 5 – as a class, no notes 6 – as a class, with notes ...
... 1 – On your own, no notes 2 – On your own, with notes 3 – With partner, no notes 4 - with partner, with notes 5 – as a class, no notes 6 – as a class, with notes ...
The Nervous System
... the neuron to “fire”) while others may be inhibitory (i.e. they tell the neuron not to fire). 2. Whether or not a neuron “fires” off an action potential at any particular instant depends on its ability to integrate these multiple positive and negative inputs. 3. This allows neurons to be fine-tuned ...
... the neuron to “fire”) while others may be inhibitory (i.e. they tell the neuron not to fire). 2. Whether or not a neuron “fires” off an action potential at any particular instant depends on its ability to integrate these multiple positive and negative inputs. 3. This allows neurons to be fine-tuned ...
Prac T12 - studylib.net
... At an electrical synapse, the presynaptic and postsynaptic membranes are locked together at: synaptic vesicles neuromuscular junctions myelinated axons gap junctions Exocytosis and the release of acetylcholine into the synaptic cleft is triggered by: calcium ions leaving the cytoplasm calcium ions ...
... At an electrical synapse, the presynaptic and postsynaptic membranes are locked together at: synaptic vesicles neuromuscular junctions myelinated axons gap junctions Exocytosis and the release of acetylcholine into the synaptic cleft is triggered by: calcium ions leaving the cytoplasm calcium ions ...
Dynamic Equilibrium Review 1. Describe the structure and function
... exchange (Na+ in, K+ out) that is the process of neuron firing. 3. How is both passive and active transport part of the function of a neuron? Sodium will rush in once the ion channels open (when the threshold potential is reached) without the assistance of energy – passive. It is active when the Na+ ...
... exchange (Na+ in, K+ out) that is the process of neuron firing. 3. How is both passive and active transport part of the function of a neuron? Sodium will rush in once the ion channels open (when the threshold potential is reached) without the assistance of energy – passive. It is active when the Na+ ...
Chapter 11
... spatial summation is how the postsynaptic cell makes the "decision" whether or not to fire an action potential. If, after all EXCITATORY and INHIBITORY input, the axon hillock reaches the "threshold" voltage, the postsynaptic cell will fire an action potential. ...
... spatial summation is how the postsynaptic cell makes the "decision" whether or not to fire an action potential. If, after all EXCITATORY and INHIBITORY input, the axon hillock reaches the "threshold" voltage, the postsynaptic cell will fire an action potential. ...
Synaptic Plasticity
... frequently takes part in exciting another, some growth process or metabolic change takes place in one or both cells and the strength of their connection increases ” ...
... frequently takes part in exciting another, some growth process or metabolic change takes place in one or both cells and the strength of their connection increases ” ...
Nervous tissues (NS)
... The cell body (soma) contains most of the cytoplasm and many of the organells usually found in cells (mitochondria, colgi apparatus, nucleus and nucleolus). The cell body also contains Nissl granules(a complex of endoplasmic reticulum and ribosome that serves as the site of protein synthesis for the ...
... The cell body (soma) contains most of the cytoplasm and many of the organells usually found in cells (mitochondria, colgi apparatus, nucleus and nucleolus). The cell body also contains Nissl granules(a complex of endoplasmic reticulum and ribosome that serves as the site of protein synthesis for the ...
Ch 35 PowerPoint - Damien Rutkoski
... When an action potential arrives at the end of an axon, the sacs release the neurotransmitters into the synapse between the two cells. Neurotransmitter molecules attach to receptors on the neighboring cell. This causes positive ions to rush across the cell membrane, stimulating the cell. If the sti ...
... When an action potential arrives at the end of an axon, the sacs release the neurotransmitters into the synapse between the two cells. Neurotransmitter molecules attach to receptors on the neighboring cell. This causes positive ions to rush across the cell membrane, stimulating the cell. If the sti ...
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.