Synapses and neuronal signalling
... • Active maintenance of the resting membrane potential • Depolarising and hyperpolarising currents • Input resistance of neurons determines the magnitude of passive changes in membrane potential • Membrane capacitance prolongs the timecourse of signals • Membrane and cytoplasmic resistance affect th ...
... • Active maintenance of the resting membrane potential • Depolarising and hyperpolarising currents • Input resistance of neurons determines the magnitude of passive changes in membrane potential • Membrane capacitance prolongs the timecourse of signals • Membrane and cytoplasmic resistance affect th ...
PowerPoint Chapter 29
... a. Signal must cross tiny gap between neurons called a synapse b. Chemical filled vesicles at end of axon (axon terminal) release chemicals in synapse ...
... a. Signal must cross tiny gap between neurons called a synapse b. Chemical filled vesicles at end of axon (axon terminal) release chemicals in synapse ...
Excitatory and inhibitory transmission in the superior olivary complex
... sites on each calyx (Schneggenberger and Neher, 2000). The role of calcium and calcium sequestration mechanisms in regulating exocytosis and vesicle recycling are major areas of interest which will have a major impact on information transmission at this site (Helmchen et al., 1997). Integration of t ...
... sites on each calyx (Schneggenberger and Neher, 2000). The role of calcium and calcium sequestration mechanisms in regulating exocytosis and vesicle recycling are major areas of interest which will have a major impact on information transmission at this site (Helmchen et al., 1997). Integration of t ...
Slide 1
... Neurons carry a negative electrical charge relative to the extra cellular fluid bathing them The plasma membrane is a semi permeable because certain ions can cross at certain times but there is not a free exchange The opening and closing of specific ion channels can be controlled by chemical signals ...
... Neurons carry a negative electrical charge relative to the extra cellular fluid bathing them The plasma membrane is a semi permeable because certain ions can cross at certain times but there is not a free exchange The opening and closing of specific ion channels can be controlled by chemical signals ...
the nervous system
... Describe the structural and functional organization of the nervous system into Central Nervous System and Peripheral Nervous System (Afferent and Efferent Divisions). b. Describe the functional organization of the Efferent Division of the Peripheral Nervous System into Autonomic Nervous System and S ...
... Describe the structural and functional organization of the nervous system into Central Nervous System and Peripheral Nervous System (Afferent and Efferent Divisions). b. Describe the functional organization of the Efferent Division of the Peripheral Nervous System into Autonomic Nervous System and S ...
The Brain
... material, and carries out the metabolic or life sustaining functions of the cell. 2. Dendrite- fibers that receive signals from the axons of other neurons and carry those signals to the cell body. 3. Axon- conducts outgoings messages to other neurons- in the brain they are a few thousandths of and i ...
... material, and carries out the metabolic or life sustaining functions of the cell. 2. Dendrite- fibers that receive signals from the axons of other neurons and carry those signals to the cell body. 3. Axon- conducts outgoings messages to other neurons- in the brain they are a few thousandths of and i ...
nervous-system-terms
... The control centre of the body. It is an organ in the skull made from nerve cells. It receives messages from all parts of the body and sends out messages in return. A long rod made of many nerves attached to the base of the brain and running down almost to the end of the spinal column. Nerves from t ...
... The control centre of the body. It is an organ in the skull made from nerve cells. It receives messages from all parts of the body and sends out messages in return. A long rod made of many nerves attached to the base of the brain and running down almost to the end of the spinal column. Nerves from t ...
Nervous System
... axon terminals, end bulbs, synapse (If myelinated, will have Schwann cells or Oligodendrocytes attached to axon) ...
... axon terminals, end bulbs, synapse (If myelinated, will have Schwann cells or Oligodendrocytes attached to axon) ...
Slide ()
... A perceptron implementing the Hubel-Wiesel model of selectivity and invariance. The network in Figure E–2C can be extended to grids of many cells by specifying synaptic connectivity at all locations in the visual field. The resulting network can be repeated four times, one for each preferred orienta ...
... A perceptron implementing the Hubel-Wiesel model of selectivity and invariance. The network in Figure E–2C can be extended to grids of many cells by specifying synaptic connectivity at all locations in the visual field. The resulting network can be repeated four times, one for each preferred orienta ...
Reflex Arc - TangHua2012-2013
... **Ca+2 causes the microfilaments to contract and pull the synaptic vesicles to the presynaptic membrane* Neurotransmitter’s job is to increase the ______________________________________ on the postsynaptic membrane. The Neurotransmitter binds to ____________________________ on the dendrite of the ne ...
... **Ca+2 causes the microfilaments to contract and pull the synaptic vesicles to the presynaptic membrane* Neurotransmitter’s job is to increase the ______________________________________ on the postsynaptic membrane. The Neurotransmitter binds to ____________________________ on the dendrite of the ne ...
notes - Mrs. Blackmon`s Science Blackboard
... inside the body • integration - processes and interprets input and makes decision • motor output - effects a response from either a muscle or a gland ...
... inside the body • integration - processes and interprets input and makes decision • motor output - effects a response from either a muscle or a gland ...
Biosc_48_Chapter_7_part_2_lecture
... The receptor protein is also an ion channel; binding of the neurotransmitter directly opens the ion channel. Nicotinic ACh receptors are ligand-gated channels with two receptor sites for two AChs. Binding of 2 acetylcholine molecules opens a channel that allows both Na+ and K+ passage. 1) Na+ fl ...
... The receptor protein is also an ion channel; binding of the neurotransmitter directly opens the ion channel. Nicotinic ACh receptors are ligand-gated channels with two receptor sites for two AChs. Binding of 2 acetylcholine molecules opens a channel that allows both Na+ and K+ passage. 1) Na+ fl ...
L23-Neurotransmitter
... hypothalamus also found in gastric mucosa and in mast cells. • Formed by decarboxylation of amino acid histidine with the help of enzyme histaminase. • Three known types of histamine receptors in found e.g. H1, H2, H3. • H3 receptors are presynaptic. Its function in brain is not very certain. Its ma ...
... hypothalamus also found in gastric mucosa and in mast cells. • Formed by decarboxylation of amino acid histidine with the help of enzyme histaminase. • Three known types of histamine receptors in found e.g. H1, H2, H3. • H3 receptors are presynaptic. Its function in brain is not very certain. Its ma ...
Spinal Cord and Ear - Mrs.Simmons Anatomy & Physiology I Lab IRSC
... can do all these at home: – Reaction time from a learned stimulus (with the ruler) p.345 Act.9 – Two-point discrimination p356 Act.2 – Adaptation of touch receptors p.357 Act. 5 – Determination of blind spot p. 371 Act. 5 ...
... can do all these at home: – Reaction time from a learned stimulus (with the ruler) p.345 Act.9 – Two-point discrimination p356 Act.2 – Adaptation of touch receptors p.357 Act. 5 – Determination of blind spot p. 371 Act. 5 ...
Printable version
... A. basic principles of electricity 1. the difference in two voltages is called the potential 2. in the body, electrical charges are provided by ions B. resting membrane potential 1. a resting neuron has an internal potential of about -70mV 2. the potential is due to the difference in the sodium and ...
... A. basic principles of electricity 1. the difference in two voltages is called the potential 2. in the body, electrical charges are provided by ions B. resting membrane potential 1. a resting neuron has an internal potential of about -70mV 2. the potential is due to the difference in the sodium and ...
Nervous System - Lemon Bay High School
... – Space in between neighboring neurons. – Contains neurotransmitters; chemicals that are released to control info/activity in brain. Types of Synapses • Neuron-to-Neuron Found throughout Nervous System ...
... – Space in between neighboring neurons. – Contains neurotransmitters; chemicals that are released to control info/activity in brain. Types of Synapses • Neuron-to-Neuron Found throughout Nervous System ...
PowerPoint version
... e. taste buds 2. The brain determines the loudness of a sound from a. the part of the organ of Corti stimulated by the sound. b. the rate of nerve impulses received. c. the size of air pressure changes in the middle ear. d. the part of the brain receiving nerve impulses from the ear. e. the size of ...
... e. taste buds 2. The brain determines the loudness of a sound from a. the part of the organ of Corti stimulated by the sound. b. the rate of nerve impulses received. c. the size of air pressure changes in the middle ear. d. the part of the brain receiving nerve impulses from the ear. e. the size of ...
Metabotropic Neurot
... Functional Roles for mGluR • All 3 classes inhibit L-type voltage sensitive Ca2+ channels • mGluR activation also closes K+ channels, leading to slow repolarization (prolong excitation) HPC and cortex • Opposite effect in cerebellum • Pre-synaptic mGluRs are inhibitory-on both Glutamate and GABA ne ...
... Functional Roles for mGluR • All 3 classes inhibit L-type voltage sensitive Ca2+ channels • mGluR activation also closes K+ channels, leading to slow repolarization (prolong excitation) HPC and cortex • Opposite effect in cerebellum • Pre-synaptic mGluRs are inhibitory-on both Glutamate and GABA ne ...
Chapter 12 - FacultyWeb Support Center
... 6. The synaptic knobs of axons contain sacs called ______________ vesicles. 7. Synaptic ______________ contain neurotransmitters. 8. When a nerve impulse reaches a synaptic knob, ________ ion diffuses inward from the extracellular fluid. 9. The calcium inside the synaptic knob initiates a series of ...
... 6. The synaptic knobs of axons contain sacs called ______________ vesicles. 7. Synaptic ______________ contain neurotransmitters. 8. When a nerve impulse reaches a synaptic knob, ________ ion diffuses inward from the extracellular fluid. 9. The calcium inside the synaptic knob initiates a series of ...
Biology 12 - Excretion
... A MOTOR neuron has a long axon and short dendrites. In the first part of the nerve impulse, the ion SODIUM moves to the inside of the neuron. The junction between one neuron and another is called a SYNAPSE. Each division of the autonomic nervous system controls the same organs, but they generally ha ...
... A MOTOR neuron has a long axon and short dendrites. In the first part of the nerve impulse, the ion SODIUM moves to the inside of the neuron. The junction between one neuron and another is called a SYNAPSE. Each division of the autonomic nervous system controls the same organs, but they generally ha ...
Peripheral Nervous System
... Relays message from sensory neuron to motor neuron Make up the brain and spinal cord ...
... Relays message from sensory neuron to motor neuron Make up the brain and spinal cord ...
The Nervous System: Basic Structure
... Nerves send a signal whenever they are stimulated past a minimum point Use the All-Or-None Principal- A neuron will fire completely or not at all. ...
... Nerves send a signal whenever they are stimulated past a minimum point Use the All-Or-None Principal- A neuron will fire completely or not at all. ...
Nervous System Cells - Dr. M`s Classes Rock
... sodium (Na+) and potassium (K+) ions in opposite directions and at different rates Maintains an imbalance in the distribution of positive ions, resulting in the inside surface becoming slightly negative compared with its outer surface ...
... sodium (Na+) and potassium (K+) ions in opposite directions and at different rates Maintains an imbalance in the distribution of positive ions, resulting in the inside surface becoming slightly negative compared with its outer surface ...
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.