THE NERVOUS SYSTEM
... Action potentials occur whenever a depolarization increases the membrane voltage to a particular value, called the threshold, for many mammalian neurons this being -55mV o Action potentials have a constant magnitude and can regenerate in adjacent regions of the membrane o Action potentials can aris ...
... Action potentials occur whenever a depolarization increases the membrane voltage to a particular value, called the threshold, for many mammalian neurons this being -55mV o Action potentials have a constant magnitude and can regenerate in adjacent regions of the membrane o Action potentials can aris ...
6.5 Nervous system part1
... potential to the positive action potential. • Re-polarisation is the change in the electrical potential from the positive action potential back to the negative resting potential. ...
... potential to the positive action potential. • Re-polarisation is the change in the electrical potential from the positive action potential back to the negative resting potential. ...
05 - Nervous Tissue
... 1. Motor neurons: Carry impulses from the CNS to the body. Example: anterior horn cells and the Autonomic neurons. 2. Sensory neurons: Carry sensory information from the body to the CNS. Example: Neurons of the dorsal root ganglia. According to Size: • The cell bodies are variable in size. They coul ...
... 1. Motor neurons: Carry impulses from the CNS to the body. Example: anterior horn cells and the Autonomic neurons. 2. Sensory neurons: Carry sensory information from the body to the CNS. Example: Neurons of the dorsal root ganglia. According to Size: • The cell bodies are variable in size. They coul ...
Neurons
... At that moment, the charge becomes less negative/even positive, creating an action potential ACTION POTENTIAL- a very brief shift in a neuron’s electrical charge that travels along an axon Voltage change will race down the axon (like a spark in a line of gunpowder) ...
... At that moment, the charge becomes less negative/even positive, creating an action potential ACTION POTENTIAL- a very brief shift in a neuron’s electrical charge that travels along an axon Voltage change will race down the axon (like a spark in a line of gunpowder) ...
axonal terminals
... 1. Polarization of the neuron's membrane: Sodium is on the outside, and potassium is on the inside. • When a neuron is not stimulated — it's just sitting with no impulse to carry or transmit — its membrane is polarized. • Being polarized means that the electrical charge on the outside of the membran ...
... 1. Polarization of the neuron's membrane: Sodium is on the outside, and potassium is on the inside. • When a neuron is not stimulated — it's just sitting with no impulse to carry or transmit — its membrane is polarized. • Being polarized means that the electrical charge on the outside of the membran ...
Neurons and Glia Three basic neurons: ∼ Multipolar: Neurons by
... Axosecretory: Axon terminal secretes directly into bloodstream Axoaxonic: Axon terminal secretes into another axon Axodendritic: Axon terminal ends on a dendritic spine Axoextracellular: Axon with no connection secretes into extracellular fluid Axosomatic: Axon terminal ends on soma Axosynaptic: Axo ...
... Axosecretory: Axon terminal secretes directly into bloodstream Axoaxonic: Axon terminal secretes into another axon Axodendritic: Axon terminal ends on a dendritic spine Axoextracellular: Axon with no connection secretes into extracellular fluid Axosomatic: Axon terminal ends on soma Axosynaptic: Axo ...
Chapter 12: Neural Tissue
... • Must depolarize to threshold (-55mV) before action potential begins – Voltage gated channels on excitable membrane open at threshold to propagate action potential ...
... • Must depolarize to threshold (-55mV) before action potential begins – Voltage gated channels on excitable membrane open at threshold to propagate action potential ...
Types of neurons
... – Squid giant axon (1 mm diameter), λ = 13 mm! – Frog muscle fiber (50 µm diameter), λ = 1.4 mm! – Mammalian nerve fiber (1 µm diameter), λ = 0.3 mm! Length constant increase! – with axon diameter! – with membrane resistance! Increase λ! – more efficient longitudinal spread of current! • faster prop ...
... – Squid giant axon (1 mm diameter), λ = 13 mm! – Frog muscle fiber (50 µm diameter), λ = 1.4 mm! – Mammalian nerve fiber (1 µm diameter), λ = 0.3 mm! Length constant increase! – with axon diameter! – with membrane resistance! Increase λ! – more efficient longitudinal spread of current! • faster prop ...
Chapter 12 Functional Organization of the Nervous System
... a. Cl- moves into cell making inside more negative. b. K+ moves out of cell making inside more negative. D. Presynaptic inhibitions and facilitation 1. Axoaxonic synapses on presynaptic terminal can alter the amount of neurotransmitter released. a. Presynaptic inhibition decreases neurotransmitter r ...
... a. Cl- moves into cell making inside more negative. b. K+ moves out of cell making inside more negative. D. Presynaptic inhibitions and facilitation 1. Axoaxonic synapses on presynaptic terminal can alter the amount of neurotransmitter released. a. Presynaptic inhibition decreases neurotransmitter r ...
Nervous - Anoka-Hennepin School District
... polarization of the neuron. Sodium ions are actively transported out of the cell and potassium ions are moved iside the cell. ...
... polarization of the neuron. Sodium ions are actively transported out of the cell and potassium ions are moved iside the cell. ...
NERVOUS SYSTEM - Welcome to the Health Science Program
... and a receiving neuron space between a terminal axon and receiving neuron is called the synaptic cleft synaptic cleft is where electrochemical transmission takes place, thus communication Impulses from one neuron are transmitted across the synapse to another neuron by a chemical called a neurotransm ...
... and a receiving neuron space between a terminal axon and receiving neuron is called the synaptic cleft synaptic cleft is where electrochemical transmission takes place, thus communication Impulses from one neuron are transmitted across the synapse to another neuron by a chemical called a neurotransm ...
Information Processing in Motor Learning
... Connects CNS with the rest of the body Sport Books Publisher ...
... Connects CNS with the rest of the body Sport Books Publisher ...
Overview of Neuromorphic Computing Chris Carothers, CCI Director
... multipolar according to the number of processes that originate from the cell body. A. Unipolar cells have a single process, with different segments serving as receptive surfaces or releasing terminals. Unipolar cells are characteristic of the invertebrate nervous system. B. Bipolar cells have two pr ...
... multipolar according to the number of processes that originate from the cell body. A. Unipolar cells have a single process, with different segments serving as receptive surfaces or releasing terminals. Unipolar cells are characteristic of the invertebrate nervous system. B. Bipolar cells have two pr ...
31.1 The Neuron
... your senses. In your notes write out the path it would take from outside the body and through the aspects of the nervous system. ...
... your senses. In your notes write out the path it would take from outside the body and through the aspects of the nervous system. ...
How is the Nervous System Organized? Class Objectives:
... The neurotransmitters are like pieces of a puzzle, and the receptor sites on the next neuron are differently shaped spaces. ‐ The chemical is almost immediately destroyed or reabsorbed (reuptake) ...
... The neurotransmitters are like pieces of a puzzle, and the receptor sites on the next neuron are differently shaped spaces. ‐ The chemical is almost immediately destroyed or reabsorbed (reuptake) ...
013368718X_CH31_483-498.indd
... about the body’s internal and external environment, processes that information, and responds to it. The peripheral nervous system consists of nerves and supporting cells. It collects information about the body’s internal and external environment. The central nervous system consists of the brain and ...
... about the body’s internal and external environment, processes that information, and responds to it. The peripheral nervous system consists of nerves and supporting cells. It collects information about the body’s internal and external environment. The central nervous system consists of the brain and ...
Chp 15 Homeostasis in Animals
... Nervous System – action potential The message is passed down an axon by ...
... Nervous System – action potential The message is passed down an axon by ...
nervous system - Doctor Jade Main
... Step 2: local current develops & spreads in all directions depolarizing adjacent parts of membrane – continues in a chain reaction Steps 3-4: more distant parts of membrane are affected – action potential moves forward – cannot reverse – because previous segment is still in absolute refractory perio ...
... Step 2: local current develops & spreads in all directions depolarizing adjacent parts of membrane – continues in a chain reaction Steps 3-4: more distant parts of membrane are affected – action potential moves forward – cannot reverse – because previous segment is still in absolute refractory perio ...
Sxn 2 Objectives
... Define graded potential. Identify where and how a graded potential can occur on a neuron. Give examples based on specific ion movements. Define threshold and action potential. Identify where and how an action potential can occur on a neuron. Compare and contrast graded potentials with action p ...
... Define graded potential. Identify where and how a graded potential can occur on a neuron. Give examples based on specific ion movements. Define threshold and action potential. Identify where and how an action potential can occur on a neuron. Compare and contrast graded potentials with action p ...
Nerve and muscle signalling
... • The frequency of spikes within a trains usually encodes the intensity of the sensation or instruction • Trains of spikes are usually interspersed by periods of silence ...
... • The frequency of spikes within a trains usually encodes the intensity of the sensation or instruction • Trains of spikes are usually interspersed by periods of silence ...
File
... synapses to make it more efficient During adolescence your brain has a major tidy-up and gets rid of lots of ...
... synapses to make it more efficient During adolescence your brain has a major tidy-up and gets rid of lots of ...
Chapter 12: Neural Tissue
... • Must depolarize to threshold (-55mV) before action potential begins – Voltage gated channels on excitable membrane open at threshold to propagate action potential ...
... • Must depolarize to threshold (-55mV) before action potential begins – Voltage gated channels on excitable membrane open at threshold to propagate action potential ...
2-3 nervous sys Sp13
... the CNS Information is integrated by interneurons in brain and spinal cord ...
... the CNS Information is integrated by interneurons in brain and spinal cord ...
Nervous System
... A. Synapse; B. Axon; C. Myelin sheath; D. Nerve impulse; E. Sense receptor; F. Response; G. Reflex; H. Cell body; I. Dendrite; J. Nerve; K. Neurotransmitter; L. Axon terminal Term ...
... A. Synapse; B. Axon; C. Myelin sheath; D. Nerve impulse; E. Sense receptor; F. Response; G. Reflex; H. Cell body; I. Dendrite; J. Nerve; K. Neurotransmitter; L. Axon terminal Term ...
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.