Introduction to the Nervous System and Nerve Tissue
... Types of Supportive Cells of the CNS (Neuroglia) 4. Ependymal Cells: Form blood-brain barrier in the brain ventricles and central canal of spinal cord. Produce cerebrospinal fluid and assist in its circulation. ...
... Types of Supportive Cells of the CNS (Neuroglia) 4. Ependymal Cells: Form blood-brain barrier in the brain ventricles and central canal of spinal cord. Produce cerebrospinal fluid and assist in its circulation. ...
Neuroglia - wsscience
... Acetylcholine Acetylcholine binds with receptor sites for sodium channel Sodium is diffused into cell, making the membrane potential more positive If the potential reaches threshold level, then an action potential will be produced ...
... Acetylcholine Acetylcholine binds with receptor sites for sodium channel Sodium is diffused into cell, making the membrane potential more positive If the potential reaches threshold level, then an action potential will be produced ...
HUMAN ANATOMY - WordPress.com
... - creates structure like a cytoskeleton - guide neuronal development - regulates composition of extracellular brain fluid ...
... - creates structure like a cytoskeleton - guide neuronal development - regulates composition of extracellular brain fluid ...
THE NERVOUS SYSTEM CH 48 AND 49
... D. How the nerve impulse moves from one cell to another • The space between two nerve cells is called a synapse • Two nerves communicate with each other by synaptic signaling • How: – When the action potential reaches the end of the axon, it stimulates the release of neurotransmitters into the syna ...
... D. How the nerve impulse moves from one cell to another • The space between two nerve cells is called a synapse • Two nerves communicate with each other by synaptic signaling • How: – When the action potential reaches the end of the axon, it stimulates the release of neurotransmitters into the syna ...
INTRODUCTION to BIOENERGETICS H.R. Kaback
... receptor becomes desensitized. In contrast, at synapses in the CNS, the primary means of terminating the signal is by re-uptake of neurotransmitters (e.g., dopamine, serotonin, glutamate, glycine) into the pre-synaptic cell and subsequent repackaging into synaptic vesicles. ...
... receptor becomes desensitized. In contrast, at synapses in the CNS, the primary means of terminating the signal is by re-uptake of neurotransmitters (e.g., dopamine, serotonin, glutamate, glycine) into the pre-synaptic cell and subsequent repackaging into synaptic vesicles. ...
Schwann cells - MsPhilip1234
... • What is the charge inside the neuron at rest? • Why is the cell negative inside and positive outside? (be specific) ...
... • What is the charge inside the neuron at rest? • Why is the cell negative inside and positive outside? (be specific) ...
Chapter 11 Marieb
... The MYELIN SHEATH is created by glial cells (oligodendrocytes and Schwann cells). It is composed of multiple layers of cell membrane that are wrapped around the axon, so essentially is a wrapping of lipid bilayer. The sheath insulates against electrical leakage and speeds the impulse conduction. NOD ...
... The MYELIN SHEATH is created by glial cells (oligodendrocytes and Schwann cells). It is composed of multiple layers of cell membrane that are wrapped around the axon, so essentially is a wrapping of lipid bilayer. The sheath insulates against electrical leakage and speeds the impulse conduction. NOD ...
chapter 3: biological bases of behavior
... Excitatory PSP: a positive voltage shift; increases likelihood that a postsynaptic neuron will fire action potentials Inhibitory PSP: neg. voltage shift; decreases likelihood that a postsynaptic neuron will fire action potentials ...
... Excitatory PSP: a positive voltage shift; increases likelihood that a postsynaptic neuron will fire action potentials Inhibitory PSP: neg. voltage shift; decreases likelihood that a postsynaptic neuron will fire action potentials ...
Nervous System
... dendrites of many other nerve cells (synapses) • In a synapse, the axon and dendrite don’t touch, there is a gap • At each axon terminal, there are vesicles containing a neurotransmitter • Once the neurotransmitter is released, it binds to receptors on the dendrite • The chemical signal gets transdu ...
... dendrites of many other nerve cells (synapses) • In a synapse, the axon and dendrite don’t touch, there is a gap • At each axon terminal, there are vesicles containing a neurotransmitter • Once the neurotransmitter is released, it binds to receptors on the dendrite • The chemical signal gets transdu ...
Nervous System Notes Outline
... Schwann cell – cells that wrap around __________ and coat it with _________ Nodes of Ranvier – __________ between myelin where _____________ occur Dendrites – branches from the cell body that ___________ info from other cells Synaptic knob – end of axon that releases __________________ Impulse ...
... Schwann cell – cells that wrap around __________ and coat it with _________ Nodes of Ranvier – __________ between myelin where _____________ occur Dendrites – branches from the cell body that ___________ info from other cells Synaptic knob – end of axon that releases __________________ Impulse ...
nervous-system-12-1
... receive signals from other neurons and send them to the cell body • Axon: conducts nerve impulses away from the cell body toward other neurons or effectors TO PREVIOUS SLIDE ...
... receive signals from other neurons and send them to the cell body • Axon: conducts nerve impulses away from the cell body toward other neurons or effectors TO PREVIOUS SLIDE ...
Chapter 12: Nervous System
... receive signals from other neurons and send them to the cell body • Axon: conducts nerve impulses away from the cell body toward other neurons or effectors TO PREVIOUS SLIDE ...
... receive signals from other neurons and send them to the cell body • Axon: conducts nerve impulses away from the cell body toward other neurons or effectors TO PREVIOUS SLIDE ...
Axon = short Dendrite = long Axon = long or short Dendrite = short
... Axon = long Dendrite = short -dendrites and cell body are located in spinal cord; axon is outside of spinal cord -PNS ...
... Axon = long Dendrite = short -dendrites and cell body are located in spinal cord; axon is outside of spinal cord -PNS ...
chapter 48
... o Allows only ONE kind of ion to pass through o Any resulting net movement of positive or negative charge generates a _____________________ ______________________ or ___________________________ across the membrane. o In other words: the action of the ion channels serves to “defeat” the action of the ...
... o Allows only ONE kind of ion to pass through o Any resulting net movement of positive or negative charge generates a _____________________ ______________________ or ___________________________ across the membrane. o In other words: the action of the ion channels serves to “defeat” the action of the ...
The Biological Bases of Behavior: The Neuron
... chemicals called neurotransmitters. At the end of the terminal button is a gap known as a synapse. This is a junction where information is transferred from one cell to another. Neurotransmitters are used to carry the signal across the synapse to other neurons. ...
... chemicals called neurotransmitters. At the end of the terminal button is a gap known as a synapse. This is a junction where information is transferred from one cell to another. Neurotransmitters are used to carry the signal across the synapse to other neurons. ...
Chapter 39
... Neurons use electrical signals to transmit information A. The neuron membrane has a resting potential B. The membrane or resting potential is the difference in electrical charge across the plasma membrane C. The neuron membrane has a sizable resting potential 1. The membrane potential is expressed i ...
... Neurons use electrical signals to transmit information A. The neuron membrane has a resting potential B. The membrane or resting potential is the difference in electrical charge across the plasma membrane C. The neuron membrane has a sizable resting potential 1. The membrane potential is expressed i ...
Quiz
... b. Threshold of excitation reached -‐> action potential -‐> neurotransmitter release -‐> inhibitory or excitatory post-‐synaptic potential c. Threshold of excitation reached -‐> neurotransmitter release -‐> action pot ...
... b. Threshold of excitation reached -‐> action potential -‐> neurotransmitter release -‐> inhibitory or excitatory post-‐synaptic potential c. Threshold of excitation reached -‐> neurotransmitter release -‐> action pot ...
Nervous System
... • Some actions don’t/can’t wait for your brain to interpret the signal • Reflexes are involuntary actions; they travel from ____ to ____: –Receptors (nerve “endings”) –Sensory neurons ...
... • Some actions don’t/can’t wait for your brain to interpret the signal • Reflexes are involuntary actions; they travel from ____ to ____: –Receptors (nerve “endings”) –Sensory neurons ...
AP Chap 48 Nervous System AP
... threshold is reached (-50 mV) – always creates the same voltage spike regardless of intensity of the stimulus. • The frequency of the action potentials increases with intensity of stimulus. • Action potentials travel in only ONE direction! • The greater the axon diameter, the faster action potential ...
... threshold is reached (-50 mV) – always creates the same voltage spike regardless of intensity of the stimulus. • The frequency of the action potentials increases with intensity of stimulus. • Action potentials travel in only ONE direction! • The greater the axon diameter, the faster action potential ...
The acquisition of myelin: An evolutionary perspective
... constraint preventing the increase in axon diameter. It has been calculated that, in human, to maintain a speed of conduction of 50m/s, solely by increasing the diameter of axons, the spinal cord would reach a diameter of 1meter! Acquisition of the myelin sheath, by maintaining the axon diameter bel ...
... constraint preventing the increase in axon diameter. It has been calculated that, in human, to maintain a speed of conduction of 50m/s, solely by increasing the diameter of axons, the spinal cord would reach a diameter of 1meter! Acquisition of the myelin sheath, by maintaining the axon diameter bel ...
Structures and Functions Lecture 2
... • Occur only in muscle cells and axons of neurons • Brief reversal of membrane potential with a change in voltage of ~100 mV ...
... • Occur only in muscle cells and axons of neurons • Brief reversal of membrane potential with a change in voltage of ~100 mV ...
Nervous System - ABC-MissAngelochsBiologyClass
... • 2. Cell nucleus • 3. Dendrites – receive impulses ...
... • 2. Cell nucleus • 3. Dendrites – receive impulses ...
Node of Ranvier
The nodes of Ranvier also known as myelin sheath gaps, are the gaps (approximately 1 micrometer in length) formed between the myelin sheaths generated by different cells. A myelin sheath is a many-layered coating, largely composed of a fatty substance called myelin, that wraps around the axon of a neuron and very efficiently insulates it. At nodes of Ranvier, the axonal membrane is uninsulated and, therefore, capable of generating electrical activity.