The Nervous System
... • Allows body to respond to stimuli • Structures • 1. Central Nervous System: • - brain • - spinal cord • 2. Peripheral Nervous System - nerves leading away from cns ...
... • Allows body to respond to stimuli • Structures • 1. Central Nervous System: • - brain • - spinal cord • 2. Peripheral Nervous System - nerves leading away from cns ...
9.2 - 4ubiology
... Electrochemical message is created by the movement of ions across the nerve cell membrane The resting nerve membrane has a electrical potential difference (potential) of -70 mV due to an unequal concentration of positive ions across the membrane ...
... Electrochemical message is created by the movement of ions across the nerve cell membrane The resting nerve membrane has a electrical potential difference (potential) of -70 mV due to an unequal concentration of positive ions across the membrane ...
Unit III Modules 9 to 13 Test Review
... Threshold: Each neuron receives depolarizing and hyperpolarizing currents from many neurons. When the depolarizing current (positive ions) minus the hyperpolarizing current (negative ions) exceed minimum intensity (threshold) the neuron fires an action potential. ...
... Threshold: Each neuron receives depolarizing and hyperpolarizing currents from many neurons. When the depolarizing current (positive ions) minus the hyperpolarizing current (negative ions) exceed minimum intensity (threshold) the neuron fires an action potential. ...
Central nervous system
... of time – spatial summation occurs when single synapse receives many EPSPs from many presynaptic cells ...
... of time – spatial summation occurs when single synapse receives many EPSPs from many presynaptic cells ...
WARM UP 3/4 - KENYON'S CLASS
... •Slowed down messages from the brain to muscle impair our reflexes, reduce reaction time and impair our coordination, and our ability to drive is impaired. •Slurring of speech, stumbling when you walk, loss of ...
... •Slowed down messages from the brain to muscle impair our reflexes, reduce reaction time and impair our coordination, and our ability to drive is impaired. •Slurring of speech, stumbling when you walk, loss of ...
Unit 1 Practice
... 7. Which of these activities most likely involves activation of the parasympathetic division? a. taking an exam b. studying for an exam c. resting after taking an exam d. waiting for a corrected exam to be returned 8. Joshua is watching a football game. Which lobe of his brain is activated as he do ...
... 7. Which of these activities most likely involves activation of the parasympathetic division? a. taking an exam b. studying for an exam c. resting after taking an exam d. waiting for a corrected exam to be returned 8. Joshua is watching a football game. Which lobe of his brain is activated as he do ...
Nervous System webquest……
... www.g2conline.org Then, search for “Virtual Neuron”. Using two neurotransmitters, balance the inputs of the neurons so that you get the primary neuron to fire. Summarize your findings from the animation. Part 5: Nerve Impulse http://www.mind.ilstu.edu/flash/synapse_1.swf 1. Neurons communicate with ...
... www.g2conline.org Then, search for “Virtual Neuron”. Using two neurotransmitters, balance the inputs of the neurons so that you get the primary neuron to fire. Summarize your findings from the animation. Part 5: Nerve Impulse http://www.mind.ilstu.edu/flash/synapse_1.swf 1. Neurons communicate with ...
Neurons
... • Myelin Sheath An insulating layer around an axon. Made up of Schwann cells. • Nodes of Ranvier Gaps between schwann cells. – Conduction of the impulse. (Situation where speed of an impulse is greatly increased by the message ‘jumping’ the gaps in an axon). ...
... • Myelin Sheath An insulating layer around an axon. Made up of Schwann cells. • Nodes of Ranvier Gaps between schwann cells. – Conduction of the impulse. (Situation where speed of an impulse is greatly increased by the message ‘jumping’ the gaps in an axon). ...
Slide 1
... just ahead to depolarize too. Speed of conduction depends on the size of the axon and the number of ion channels. Myelin permits the action potential to travel rapidly from node to node by blocking the membrane ...
... just ahead to depolarize too. Speed of conduction depends on the size of the axon and the number of ion channels. Myelin permits the action potential to travel rapidly from node to node by blocking the membrane ...
The Brain: It`s All In Your Mind
... Anatomy of a basic neuron: Neurons are comprised of three major parts – Dendrites, Cell Body, and Axon. See Figure 2 Neuron, next page. Most neurons have a series of branching extensions called dendrites. They look something like small tree branches. Dendrites extend out from the cell body. These de ...
... Anatomy of a basic neuron: Neurons are comprised of three major parts – Dendrites, Cell Body, and Axon. See Figure 2 Neuron, next page. Most neurons have a series of branching extensions called dendrites. They look something like small tree branches. Dendrites extend out from the cell body. These de ...
brainy tests - WordPress.com
... One estimate puts the human brain at about 100 billion neurons and 100 trillion synapses. True ...
... One estimate puts the human brain at about 100 billion neurons and 100 trillion synapses. True ...
Nervous System = communication conduit b/w brain
... Neurons with myelin carry impulses associated with sharp pain. Neurons that lack myelin carry impulses associated with dull, throbbing pain. Action potential in these neurons travels much more slowly than they do in neurons with myelin. Synapse = small gap between axon of 1 neuron & dendrite o ...
... Neurons with myelin carry impulses associated with sharp pain. Neurons that lack myelin carry impulses associated with dull, throbbing pain. Action potential in these neurons travels much more slowly than they do in neurons with myelin. Synapse = small gap between axon of 1 neuron & dendrite o ...
Automatic unconscious knowledge
... Automatic unconscious knowledge - Tsushima, Sasaki, & Watanabe (2006). Science, 314. ...
... Automatic unconscious knowledge - Tsushima, Sasaki, & Watanabe (2006). Science, 314. ...
Nervous tissue
... • a negative voltage change causing postsynaptic cell to be less likely to fire (hyperpolarize) • result of Cl- flowing into the cell or K+ leaving the cell • glycine and GABA are inhibitory neurotransmitters ...
... • a negative voltage change causing postsynaptic cell to be less likely to fire (hyperpolarize) • result of Cl- flowing into the cell or K+ leaving the cell • glycine and GABA are inhibitory neurotransmitters ...
Bradley`s.
... The ion channels will open and close allowing ions to pass in and out of the cell When a cell is resting (not transmitting information) the ion channels are closed creating a slight negative charge. Outside the cell, the charge is positive making the resting neuron become what is known as polarized. ...
... The ion channels will open and close allowing ions to pass in and out of the cell When a cell is resting (not transmitting information) the ion channels are closed creating a slight negative charge. Outside the cell, the charge is positive making the resting neuron become what is known as polarized. ...
Biopsychology
... A large enough depolarization causes the inside of the cell to become positive with respect to the outside at the point of stimulation. Is contagious & results in the info being carried down the length of the cell. Is all-or-none. Summary Synaptic Transmission The Synapse Exocytosis Ov ...
... A large enough depolarization causes the inside of the cell to become positive with respect to the outside at the point of stimulation. Is contagious & results in the info being carried down the length of the cell. Is all-or-none. Summary Synaptic Transmission The Synapse Exocytosis Ov ...
Unimodal or Bimodal Distribution of Synaptic Weights?
... Most Hebbian learning rules or BCM rules used to describe receptive field development exhibit a spontaneous separation of synaptic weights into two groups, i.e., strong and weak synapses, so that the distribution of synaptic weights is bimodal. This implies that even rather ‘weak’, non-significant c ...
... Most Hebbian learning rules or BCM rules used to describe receptive field development exhibit a spontaneous separation of synaptic weights into two groups, i.e., strong and weak synapses, so that the distribution of synaptic weights is bimodal. This implies that even rather ‘weak’, non-significant c ...
Introduction to Anatomy
... basic properties of their cell membranes: 1. There is an electrical voltage, called the resting membrane potential, across the cell membrane. 2. Their cell membranes contain a variety of ion channels (pores) that may be open or ...
... basic properties of their cell membranes: 1. There is an electrical voltage, called the resting membrane potential, across the cell membrane. 2. Their cell membranes contain a variety of ion channels (pores) that may be open or ...
Slide 1
... 1. Neurons are electrically active; They have a resting voltage, and can undergo electrical changes ...
... 1. Neurons are electrically active; They have a resting voltage, and can undergo electrical changes ...
chapter the nervous system and the effects of drugs
... Read the paragraph in the box and study the diagram. Then answer the questions. The nervous system is like a very complicated computer. As in a computer, electrical signals travel throughout the system. Instead of the wires you would see in a computer, the nervous system is made up of nerve cells, o ...
... Read the paragraph in the box and study the diagram. Then answer the questions. The nervous system is like a very complicated computer. As in a computer, electrical signals travel throughout the system. Instead of the wires you would see in a computer, the nervous system is made up of nerve cells, o ...
Nervous System
... Examples of reflex action: knee jerk, eye blink, pupil size alteration, closure of the glottis on swallowing. A reflex arc is a specific nerve pathway involved in a fast, unconscious response to an unexpected stimulus. E.g. Spinal Reflex Action - the withdrawal of hand when finger jabbed unexp ...
... Examples of reflex action: knee jerk, eye blink, pupil size alteration, closure of the glottis on swallowing. A reflex arc is a specific nerve pathway involved in a fast, unconscious response to an unexpected stimulus. E.g. Spinal Reflex Action - the withdrawal of hand when finger jabbed unexp ...
Action_ Resting_Potential
... resting state. In the resting state, the inside of a neuron has a slightly higher concentration of negatively charged ions than the outside does. This situation creates a slight negative charge inside the neuron, which acts as a store of potential energy called the resting potential. The resting pot ...
... resting state. In the resting state, the inside of a neuron has a slightly higher concentration of negatively charged ions than the outside does. This situation creates a slight negative charge inside the neuron, which acts as a store of potential energy called the resting potential. The resting pot ...
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... • One person holds the yard stick up • Second person is being tested at how fast they can respond to the yard stick falling • The first person will release the yard stick and the second person will catch it. They will record where their hand grabs the yard stick. • Using this formula: t = √2y/g , y ...
... • One person holds the yard stick up • Second person is being tested at how fast they can respond to the yard stick falling • The first person will release the yard stick and the second person will catch it. They will record where their hand grabs the yard stick. • Using this formula: t = √2y/g , y ...
Topic Presentation: Biopsychology
... i. Electrical impulse in the axon is converted into a chemical message c. Neurotransmitters i. Biochemical substances released into the synaptic cleft to stimulate or suppress other neurons ii. Different kinds of Neurotransmitters molecules have specific shapes d. Receptors i. Lock and Key e. Reupta ...
... i. Electrical impulse in the axon is converted into a chemical message c. Neurotransmitters i. Biochemical substances released into the synaptic cleft to stimulate or suppress other neurons ii. Different kinds of Neurotransmitters molecules have specific shapes d. Receptors i. Lock and Key e. Reupta ...
Synaptic gating
Synaptic gating is the ability of neural circuits to gate inputs by either suppressing or facilitating specific synaptic activity. Selective inhibition of certain synapses has been studied thoroughly (see Gate theory of pain), and recent studies have supported the existence of permissively gated synaptic transmission. In general, synaptic gating involves a mechanism of central control over neuronal output. It includes a sort of gatekeeper neuron, which has the ability to influence transmission of information to selected targets independently of the parts of the synapse upon which it exerts its action (see also neuromodulation).Bistable neurons have the ability to oscillate between a hyperpolarized (down state) and a depolarized (up state) resting membrane potential without firing an action potential. These neurons can thus be referred to as up/down neurons. According to one model, this ability is linked to the presence of NMDA and AMPA glutamate receptors. External stimulation of the NMDA receptors is responsible for moving the neuron from the down state to the up state, while the stimulation of AMPA receptors allows the neuron to reach and surpass the threshold potential. Neurons that have this bistable ability have the potential to be gated because outside gatekeeper neurons can modulate the membrane potential of the gated neuron by selectively shifting them from the up state to the down state. Such mechanisms have been observed in the nucleus accumbens, with gatekeepers originating in the cortex, thalamus and basal ganglia.