Biology 12 Nervous System Major Divisions of Nervous System 1
... • In this situation there is also a higher concentration of Sodium ions on the outside of the membrane than on the inside and also a higher concentration of Potassium ions on the inside than on the outside. • In the centre of the neuron are large negatively charged units which are responsible for th ...
... • In this situation there is also a higher concentration of Sodium ions on the outside of the membrane than on the inside and also a higher concentration of Potassium ions on the inside than on the outside. • In the centre of the neuron are large negatively charged units which are responsible for th ...
3.E.2 Nervous System - kromko
... 4. The membrane hyperpolarizes (becomes more negative than resting potential). During this period of recovery, called the refractory period, the nerve cell cannot be stimulated again. The sodium-potassium pump returns the membrane potential to -70 mV. ...
... 4. The membrane hyperpolarizes (becomes more negative than resting potential). During this period of recovery, called the refractory period, the nerve cell cannot be stimulated again. The sodium-potassium pump returns the membrane potential to -70 mV. ...
The Nervous System
... The Resting Neuron • Not transmitting an impulse • If the outside of the cell has a positive charge and inside of the cell is a negative charge, then the neuron is said to be at resting potential ...
... The Resting Neuron • Not transmitting an impulse • If the outside of the cell has a positive charge and inside of the cell is a negative charge, then the neuron is said to be at resting potential ...
Nervous Systems (ch. 48 & 49) Sum13
... • Sum of all excitatory & inhibitory ‘blips’ = summation action potential ...
... • Sum of all excitatory & inhibitory ‘blips’ = summation action potential ...
NMSI - 1 Intro to the Nervous System
... • A typical neuron has a cell body, axons and dendrites. Many axons may have a myelin sheath that acts as an electrical insulator. ...
... • A typical neuron has a cell body, axons and dendrites. Many axons may have a myelin sheath that acts as an electrical insulator. ...
The Nervous System - Zen Shiatsu Chicago
... o Voltage = measure of potential energy generated by separated charge o Potential or potential difference = measurement of voltage between two points; the greater the difference in charge between two points, the higher the voltage o Current = flow of electrical charge between two points o Resistance ...
... o Voltage = measure of potential energy generated by separated charge o Potential or potential difference = measurement of voltage between two points; the greater the difference in charge between two points, the higher the voltage o Current = flow of electrical charge between two points o Resistance ...
Chapter 3 Notes (part 1) 1. Basic Elements of the Nervous System (a
... down the axon toward the axon terminal (this is the action potential) D. The “all or nothing” principle states that neurons are either active or inactive. EITHER the charge reaches the stimulus threshold, causing an action potential, or it fails to reach that level, in which case the cell repolarize ...
... down the axon toward the axon terminal (this is the action potential) D. The “all or nothing” principle states that neurons are either active or inactive. EITHER the charge reaches the stimulus threshold, causing an action potential, or it fails to reach that level, in which case the cell repolarize ...
to specify axonal trajectories and target specificity of Jessell, 2000; Shira-
... In addition to the anatomical studies, the authors provide new insight into how these pathways may operate as “choice points” between incompatible behaviors. The pathway-specific projections of Lhx6expressing neurons in the MEApd show preferential activation by reproductive olfactory cues such as fe ...
... In addition to the anatomical studies, the authors provide new insight into how these pathways may operate as “choice points” between incompatible behaviors. The pathway-specific projections of Lhx6expressing neurons in the MEApd show preferential activation by reproductive olfactory cues such as fe ...
Psych 11Nervous System Overview
... muscle), shunting of blood away from the digestive organs to make more blood available to muscles (effector is smooth muscle of arterioles), and the release of hormones such as adrenalin/epinephrine (effector is adrenal gland). The parasympathetic branch of the ANS acts to normalize conditions in ...
... muscle), shunting of blood away from the digestive organs to make more blood available to muscles (effector is smooth muscle of arterioles), and the release of hormones such as adrenalin/epinephrine (effector is adrenal gland). The parasympathetic branch of the ANS acts to normalize conditions in ...
file
... nerve cell (inner surface of plasma membrane) is more negative than on the outside of the cell (due to the permeability of the membrane allowing K+ ions to move outside the cell). ...
... nerve cell (inner surface of plasma membrane) is more negative than on the outside of the cell (due to the permeability of the membrane allowing K+ ions to move outside the cell). ...
File
... T6.5.6 - Propagation of nerve impulses is the result of local currents that cause each successive part of the axon to reach the threshold potential. Propagation of nerve impulses along the axon results from the diffusion of Na+ ions from the area that was just depolarized to the neighbouring area ...
... T6.5.6 - Propagation of nerve impulses is the result of local currents that cause each successive part of the axon to reach the threshold potential. Propagation of nerve impulses along the axon results from the diffusion of Na+ ions from the area that was just depolarized to the neighbouring area ...
22 reflexes 1 - The reflex arc
... If these excitatory potentials summate enough to bring the efferent membrane to threshold, the efferent neuron fires The efferent axon also carries all-or-none action potentials The neuromuscular junction the response there is also the need for summation, but the excitatory post-synaptic potential i ...
... If these excitatory potentials summate enough to bring the efferent membrane to threshold, the efferent neuron fires The efferent axon also carries all-or-none action potentials The neuromuscular junction the response there is also the need for summation, but the excitatory post-synaptic potential i ...
nervous system ppt
... In the normal communication process, dopamine is released by a neuron into the synapse, where it can bind to dopamine receptors on neighboring neurons. Normally, dopamine is then recycled back into the transmitting neuron by a specialized protein called the dopamine transporter. If cocaine is pres ...
... In the normal communication process, dopamine is released by a neuron into the synapse, where it can bind to dopamine receptors on neighboring neurons. Normally, dopamine is then recycled back into the transmitting neuron by a specialized protein called the dopamine transporter. If cocaine is pres ...
11: Fundamentals of the Nervous System and Nervous Tissue
... The neuron cell membrane is polarized, being more negatively charged inside than outside. The degree of this difference in electrical charge is the resting membrane potential. ...
... The neuron cell membrane is polarized, being more negatively charged inside than outside. The degree of this difference in electrical charge is the resting membrane potential. ...
Ch. 12 Nervous Tissue
... • Understand how the nervous system is divided and the types of cells that are found in nervous tissue • Know the anatomy of a neuron and the structural and functional types of neurons • Understand what a potential is and how this can ...
... • Understand how the nervous system is divided and the types of cells that are found in nervous tissue • Know the anatomy of a neuron and the structural and functional types of neurons • Understand what a potential is and how this can ...
1. Impulse Conduction
... brain – info can also come from inside the body like the organs B) Motor or efferent neurons = conduct messages form the spinal cord and brain to muscle and glands e.g. If you want to run brain sends message to muscles ...
... brain – info can also come from inside the body like the organs B) Motor or efferent neurons = conduct messages form the spinal cord and brain to muscle and glands e.g. If you want to run brain sends message to muscles ...
Drug Addiction - Perelman School of Medicine at the
... electrical impulses away from the neuron's cell body or soma. ...
... electrical impulses away from the neuron's cell body or soma. ...
PSYCH 2230
... Wednesday, August 31st Lecture Keywords: Neurophysiology, cell membrane, resting potential, action potential, concentration gradient, charge gradient, spike Neurophysiology: 1. Neurons do actually look like the diagram. ...
... Wednesday, August 31st Lecture Keywords: Neurophysiology, cell membrane, resting potential, action potential, concentration gradient, charge gradient, spike Neurophysiology: 1. Neurons do actually look like the diagram. ...
histology of nervous tissue
... Support and brace neurons Anchor neurons to their nutrient supplies Guide migration of young neurons Control the chemical environment ...
... Support and brace neurons Anchor neurons to their nutrient supplies Guide migration of young neurons Control the chemical environment ...
10synapse & neurotransmitter
... • A single neuron maybe connected to 5000 to 10,000 other neurons. • Brain is responsible for different activities like sensations, movements of muscle, thought, emotion, memory – all these depend on electrical and chemical signaling between neurons along wired neural pathways. ...
... • A single neuron maybe connected to 5000 to 10,000 other neurons. • Brain is responsible for different activities like sensations, movements of muscle, thought, emotion, memory – all these depend on electrical and chemical signaling between neurons along wired neural pathways. ...
Neuroscience and Behavior
... Neurons that receive information from the external world and convey this information to the brain via the spinal cord. Motor Neurons Neurons that carry signals from the spinal cord and produce movement. ...
... Neurons that receive information from the external world and convey this information to the brain via the spinal cord. Motor Neurons Neurons that carry signals from the spinal cord and produce movement. ...
Nervous Systems
... • Neurons are excitable cells – a stimulus can change the neuron’s membrane potential • Resting potential – membrane potential of unexcited neuron (-70mV) • Neurons become “excited,” when a stimulus opens a gated ion channel and increases the movement of K+ or Na+ across the plasma membrane ...
... • Neurons are excitable cells – a stimulus can change the neuron’s membrane potential • Resting potential – membrane potential of unexcited neuron (-70mV) • Neurons become “excited,” when a stimulus opens a gated ion channel and increases the movement of K+ or Na+ across the plasma membrane ...
Nervous System ch 11
... –Restores the resting electrical conditions of the neuron –Does not restore the resting ionic conditions •Redistributes ions back to their resting conditions which restores the sodium-potassium pump Phases of the Action Potential •1 – resting state •2 – depolarization phase •3 – repolarization phase ...
... –Restores the resting electrical conditions of the neuron –Does not restore the resting ionic conditions •Redistributes ions back to their resting conditions which restores the sodium-potassium pump Phases of the Action Potential •1 – resting state •2 – depolarization phase •3 – repolarization phase ...