![Neurons](http://s1.studyres.com/store/data/005396809_1-4d660f27c433ee95f0cd68a6369b2111-300x300.png)
Structure of a Neuron
... Basis of the Resting Membrane Potential • Since Na+ ion are more concentrated in the ECF when a specific voltage gated Na+ channel opens Na+ will always rush into the cell by diffusion. • Since K+ ion channels are more concentrated in the ICF when a specific voltage gated K+ channel opens K+ will a ...
... Basis of the Resting Membrane Potential • Since Na+ ion are more concentrated in the ECF when a specific voltage gated Na+ channel opens Na+ will always rush into the cell by diffusion. • Since K+ ion channels are more concentrated in the ICF when a specific voltage gated K+ channel opens K+ will a ...
Nervous System
... myelinated processes, but gray matter contains nerve cell bodies, dendrites, axon terminals or bundles of unmyelinated axons & neuroglia In the spinal cord, gray matter form H shaped inner core surrounded by white matter. In the brain, a thin outer shell of gray matter covers the cerebral hemisphere ...
... myelinated processes, but gray matter contains nerve cell bodies, dendrites, axon terminals or bundles of unmyelinated axons & neuroglia In the spinal cord, gray matter form H shaped inner core surrounded by white matter. In the brain, a thin outer shell of gray matter covers the cerebral hemisphere ...
1.nerve notes
... - They block the enzyme from destroying the neurotransmitter after the message has been sent, so they keep sending the message The receptors get worn out & stop working (this is addiction) Addiction is when the person physically needs the drug to function ...
... - They block the enzyme from destroying the neurotransmitter after the message has been sent, so they keep sending the message The receptors get worn out & stop working (this is addiction) Addiction is when the person physically needs the drug to function ...
CS 256: Neural Computation Lecture Notes
... and desribed the dynamics mathematically. Awarded the Nobel Prize in 1963 for this work. • Two types of electric potentials – Synaptic/receptor potentials are graded, sustained and local. They are usually stimulated by neurotransmitters. (The stronger the stimulus, the larger the potential.) They ad ...
... and desribed the dynamics mathematically. Awarded the Nobel Prize in 1963 for this work. • Two types of electric potentials – Synaptic/receptor potentials are graded, sustained and local. They are usually stimulated by neurotransmitters. (The stronger the stimulus, the larger the potential.) They ad ...
Central Nervous System
... Nervous System: coordinates and controls body activity. It detects and processes internal and external information and sends out an appropriate response. Major structures of nervous system: brain, spinal cord, peripheral nerves, and sensory organs. Two major parts of the nervous system are: Centr ...
... Nervous System: coordinates and controls body activity. It detects and processes internal and external information and sends out an appropriate response. Major structures of nervous system: brain, spinal cord, peripheral nerves, and sensory organs. Two major parts of the nervous system are: Centr ...
File
... CNS (thus, in the Peripheral Nervous System (PNS)), or they simply exist within, and contribute to the structure of the CNS itself. -- the action potential (nerve impulse) does NOT diminish in strength as its journey along an axon persists. -- synaptic endings are swellings at the end of an axon. -- ...
... CNS (thus, in the Peripheral Nervous System (PNS)), or they simply exist within, and contribute to the structure of the CNS itself. -- the action potential (nerve impulse) does NOT diminish in strength as its journey along an axon persists. -- synaptic endings are swellings at the end of an axon. -- ...
Nervous System
... Na+ influx causes more depolarization At threshold (–55 to –50 mV) positive feedback leads to opening of all Na+ channels, and a reversal of membrane polarity to +30mV (spike of action potential) ...
... Na+ influx causes more depolarization At threshold (–55 to –50 mV) positive feedback leads to opening of all Na+ channels, and a reversal of membrane polarity to +30mV (spike of action potential) ...
neuron
... • Action Potential: neural impulse or brief electrical charge that travels down an axon at speeds as fast as ...
... • Action Potential: neural impulse or brief electrical charge that travels down an axon at speeds as fast as ...
Neural Tissue
... • Long cytoplasmic process attached to soma at the axon hillock – Initial segment • First part of axon • Contains the trigger zone, area where impulses arise at the junction of the axon hillock and the initial segment – Axon terminals • End of axon • May have bulb-shaped structures called synaptic e ...
... • Long cytoplasmic process attached to soma at the axon hillock – Initial segment • First part of axon • Contains the trigger zone, area where impulses arise at the junction of the axon hillock and the initial segment – Axon terminals • End of axon • May have bulb-shaped structures called synaptic e ...
Chapter 3
... 1. Know the main structures of neurons and the structural differences among neurons. 2. Know the main types of glia and their functions. 3. Be able to describe the advantages and disadvantages of the blood-brain barrier. Module 2.2 The Nerve Impulse 4. Understand why the neuron uses considerable ene ...
... 1. Know the main structures of neurons and the structural differences among neurons. 2. Know the main types of glia and their functions. 3. Be able to describe the advantages and disadvantages of the blood-brain barrier. Module 2.2 The Nerve Impulse 4. Understand why the neuron uses considerable ene ...
Document
... • Specialized to conduct information from one part of the body to another • There are many, many different types of neurons but most have certain structural and functional characteristics in common: - Cell body (soma) - One or more specialized, slender processes (axons/dendrites) - An input region ( ...
... • Specialized to conduct information from one part of the body to another • There are many, many different types of neurons but most have certain structural and functional characteristics in common: - Cell body (soma) - One or more specialized, slender processes (axons/dendrites) - An input region ( ...
BIOLOGICAL BASES OF BEHAVIOR
... All your behavior begins with actions of your neurons. A neuron gets incoming information from its receptor sites spread around the dendrites. That information is sent to the cell body. Neural impulses are electrical in nature along the neuron. The neuron at rest is more negative inside the cell mem ...
... All your behavior begins with actions of your neurons. A neuron gets incoming information from its receptor sites spread around the dendrites. That information is sent to the cell body. Neural impulses are electrical in nature along the neuron. The neuron at rest is more negative inside the cell mem ...
and peripheral nerves, and is composed of cells called neurons that
... • Sodium is found in greater concentrations outside of the cell while potassium is found in greater concentrations inside the cell. Sodiumpotassium pumps exist in the plasma membrane to maintain the the concentration gradients and the membrane potential. Nerve impulses have a domino effect. An actio ...
... • Sodium is found in greater concentrations outside of the cell while potassium is found in greater concentrations inside the cell. Sodiumpotassium pumps exist in the plasma membrane to maintain the the concentration gradients and the membrane potential. Nerve impulses have a domino effect. An actio ...
The Somatic Senses - Appoquinimink High School
... Middle ear – includes tympanic cavity, eardrum, and auditory ossicles (three small bones) ...
... Middle ear – includes tympanic cavity, eardrum, and auditory ossicles (three small bones) ...
Nerve
... choline, catalyzed in cleft. by may inhibit synaptic is presynaptic neuron and the other is postsynaptic channels, saltatory conduction, jumping from node segment of membrane is equilibrated by adjacent receptor on postsynaptic mem. Several types of NT -Application of NT directly to target cell must ...
... choline, catalyzed in cleft. by may inhibit synaptic is presynaptic neuron and the other is postsynaptic channels, saltatory conduction, jumping from node segment of membrane is equilibrated by adjacent receptor on postsynaptic mem. Several types of NT -Application of NT directly to target cell must ...
`synapse`.
... not any electrical signal that jumps the synapse) that excites or inhibits the postsynaptic neurons into activating or not. ...
... not any electrical signal that jumps the synapse) that excites or inhibits the postsynaptic neurons into activating or not. ...
Chapter 2
... But new dendrites can grow Provides room for more connections to other neurons New connections are basis for learning ...
... But new dendrites can grow Provides room for more connections to other neurons New connections are basis for learning ...
Nerve Tissue Notes
... Nerve Tissue • Made of connected neurons and neuroglial cells – Control over responses – Transmit electrical and chemical signals ...
... Nerve Tissue • Made of connected neurons and neuroglial cells – Control over responses – Transmit electrical and chemical signals ...
Activity of Spiking Neurons Stimulated by External Signals of
... deliver signals and act like an “input device”. Soma is the “central processing unit” that generates a signal if the total input exceeds a certain threshold (about -30 mV) and the axon transmits the signals to other neurons. Synapses are the contact points for transferring information between neuron ...
... deliver signals and act like an “input device”. Soma is the “central processing unit” that generates a signal if the total input exceeds a certain threshold (about -30 mV) and the axon transmits the signals to other neurons. Synapses are the contact points for transferring information between neuron ...
The Nervous System - Volunteer State Community College
... One neuron may receive information from thousands of synapses. Some synapses are excitatory, others are ...
... One neuron may receive information from thousands of synapses. Some synapses are excitatory, others are ...
Stimulus (physiology)
In physiology, a stimulus (plural stimuli) is a detectable change in the internal or external environment. The ability of an organism or organ to respond to external stimuli is called sensitivity. When a stimulus is applied to a sensory receptor, it normally elicits or influences a reflex via stimulus transduction. These sensory receptors can receive information from outside the body, as in touch receptors found in the skin or light receptors in the eye, as well as from inside the body, as in chemoreceptors and mechanorceptors. An internal stimulus is often the first component of a homeostatic control system. External stimuli are capable of producing systemic responses throughout the body, as in the fight-or-flight response. In order for a stimulus to be detected with high probability, its level must exceed the absolute threshold; if a signal does reach threshold, the information is transmitted to the central nervous system (CNS), where it is integrated and a decision on how to react is made. Although stimuli commonly cause the body to respond, it is the CNS that finally determines whether a signal causes a reaction or not.