Technical Definitions
... This means that the magnitude of a neuron’s response to a stimulus is independent of the strength of that stimulus. When a single stimulus is strong enough to exceed a certain threshold potential, the neuron will fire. A stimulus that substantially exceeds the threshold potential does not generate a ...
... This means that the magnitude of a neuron’s response to a stimulus is independent of the strength of that stimulus. When a single stimulus is strong enough to exceed a certain threshold potential, the neuron will fire. A stimulus that substantially exceeds the threshold potential does not generate a ...
Sympathetic - Perkins Science
... • Medulla – originates from neural crest; innervated by preganglionic sympathetic fibers which trigger the secretion of epinephrine into the blood • Cortex – secretes steroid hormones • Sympathoadrenal system – stimulation of adrenal medulla by mass activation of sympathetic nervous system ...
... • Medulla – originates from neural crest; innervated by preganglionic sympathetic fibers which trigger the secretion of epinephrine into the blood • Cortex – secretes steroid hormones • Sympathoadrenal system – stimulation of adrenal medulla by mass activation of sympathetic nervous system ...
LECTURE23.EmotionDriveDrugs
... the ventral tegmental area (VTA) that project to the nucleus accumbens (NA) region of the forebrain Rats can be implanted with electrodes into the VTA, with stimulation triggered by the animals pressing a lever. Such animals learn to frequently self-”reward” by pressing the lever ...
... the ventral tegmental area (VTA) that project to the nucleus accumbens (NA) region of the forebrain Rats can be implanted with electrodes into the VTA, with stimulation triggered by the animals pressing a lever. Such animals learn to frequently self-”reward” by pressing the lever ...
The biological basis of behavior
... The synapse • Synapse: area composed of the axon terminal of one neuron, the synaptic space, and the dendrite or cell body of the next neuron. • Neurotransmitters: chemicals released by the synaptic vesicles that travel across the synaptic space and affect adjacent neurons. ...
... The synapse • Synapse: area composed of the axon terminal of one neuron, the synaptic space, and the dendrite or cell body of the next neuron. • Neurotransmitters: chemicals released by the synaptic vesicles that travel across the synaptic space and affect adjacent neurons. ...
Chapter 9 Touch, Pain, Taste and Smell
... The tongue is as sensitive to touch, temperature, and pain as is the thumb. In addition, the tongue performs a chemical analysis of substances dissolved in the saliva. It senses 5 basic tastes: bitter, sour, salty, sweet and, the recently discovered, umami. Each taste can be sensed everywhere on the ...
... The tongue is as sensitive to touch, temperature, and pain as is the thumb. In addition, the tongue performs a chemical analysis of substances dissolved in the saliva. It senses 5 basic tastes: bitter, sour, salty, sweet and, the recently discovered, umami. Each taste can be sensed everywhere on the ...
Document
... cardiac muscle, and endocrine glands • Contralateral reflex - starts on one side of body and travels to opposite side • Ipsilateral reflex - stimulus and response are on same side of body ...
... cardiac muscle, and endocrine glands • Contralateral reflex - starts on one side of body and travels to opposite side • Ipsilateral reflex - stimulus and response are on same side of body ...
Chp 9: NERVOUS TISSUE
... ______________________________: have several dendrites and one axon; most in brain and spinal cord ______________________________: have one main dendrite and one axon; retina of the eye, inner ear, olfactory area of brain ______________________________: dendrites and one axon fused together fo ...
... ______________________________: have several dendrites and one axon; most in brain and spinal cord ______________________________: have one main dendrite and one axon; retina of the eye, inner ear, olfactory area of brain ______________________________: dendrites and one axon fused together fo ...
Intro Nervous System and Neurons
... Axon Terminals- axon ends • contain vesicles with neurotransmitters • do not touch dendrite of next neuron OR muscle – Synaptic cleft—gap between adjacent neurons – Synapse—junction between nerves ...
... Axon Terminals- axon ends • contain vesicles with neurotransmitters • do not touch dendrite of next neuron OR muscle – Synaptic cleft—gap between adjacent neurons – Synapse—junction between nerves ...
Nervous System - Academic Computer Center
... neurotransmitter, and spatial summation, which occurs when the postsynaptic cell is stimulated at the same time by multiple terminals. ...
... neurotransmitter, and spatial summation, which occurs when the postsynaptic cell is stimulated at the same time by multiple terminals. ...
Chapters 13, and 14
... not move backwards. In myelinated fibers the action potential only occurs at the nodes of Ranvier. This is called saltatory conduction. The Synapse Transmission of the nerve impulse from one neuron to another takes place at a synapse when a neurotransmitter molecule is released from an axon bulb int ...
... not move backwards. In myelinated fibers the action potential only occurs at the nodes of Ranvier. This is called saltatory conduction. The Synapse Transmission of the nerve impulse from one neuron to another takes place at a synapse when a neurotransmitter molecule is released from an axon bulb int ...
Review (10/25/16) updated
... • Which type of hair cell receives more efferent input from the brain – Outer. If you do not know what efferent means, google it. This should make sense. ...
... • Which type of hair cell receives more efferent input from the brain – Outer. If you do not know what efferent means, google it. This should make sense. ...
Touch is complicated
... tail, whiskers, skin – in other animals) Perception of motion (change in location of above) ...
... tail, whiskers, skin – in other animals) Perception of motion (change in location of above) ...
File
... • Relay neurons • One long axon with cell body that may • Found entirely in CNS be near source of stimuli or in swelling of a spinal nerve (GANGLION) • Dendron is usually longer than the axon • Contains many dendrites • Some are myelinated • May form synapse with relay neuron ...
... • Relay neurons • One long axon with cell body that may • Found entirely in CNS be near source of stimuli or in swelling of a spinal nerve (GANGLION) • Dendron is usually longer than the axon • Contains many dendrites • Some are myelinated • May form synapse with relay neuron ...
Notes Intro to Nervous System and Neurons
... Axon Terminals- axon ends • contain vesicles with neurotransmitters • do not touch dendrite of next neuron OR muscle – Synaptic cleft—gap between adjacent neurons – Synapse—junction between nerves ...
... Axon Terminals- axon ends • contain vesicles with neurotransmitters • do not touch dendrite of next neuron OR muscle – Synaptic cleft—gap between adjacent neurons – Synapse—junction between nerves ...
G. Nervous system physiology a. Explain the basic
... (IPSP). Slow EPSPs and IPSPs are caused by transmitters which alter the permeability to K+. Each neurone releases only one neurotransmitter and so is either excitatory or inhibitory. Inhibitory interneurones allow one neurone to act to generate both EPSPs and IPSPs. If enough EPSPs sum in time and p ...
... (IPSP). Slow EPSPs and IPSPs are caused by transmitters which alter the permeability to K+. Each neurone releases only one neurotransmitter and so is either excitatory or inhibitory. Inhibitory interneurones allow one neurone to act to generate both EPSPs and IPSPs. If enough EPSPs sum in time and p ...
Lesson 3 Brain Communication
... • They look like roots of a tree. • DENDRITES: Short fibers sticking out of a neuron that work as receptors (receivers) for messages. • They receive messages from other nerve cells and send it through the neuron. • The have DENDRITIC RECEPTORS on the ends: • Receivers on the end of each dendrite whi ...
... • They look like roots of a tree. • DENDRITES: Short fibers sticking out of a neuron that work as receptors (receivers) for messages. • They receive messages from other nerve cells and send it through the neuron. • The have DENDRITIC RECEPTORS on the ends: • Receivers on the end of each dendrite whi ...
Exercise 17
... Nissl bodies: elaborate type of rough ER; involved in the metabolic activity of the the cell Dendrites: are receptive regions that bear receptors for neurotransmitters released by other neurons Axons: are nerve impulse generators and transmitters Collaterals: branches of axons from neurons Axon Hill ...
... Nissl bodies: elaborate type of rough ER; involved in the metabolic activity of the the cell Dendrites: are receptive regions that bear receptors for neurotransmitters released by other neurons Axons: are nerve impulse generators and transmitters Collaterals: branches of axons from neurons Axon Hill ...
Nervous System Neurons And Synapses
... 2. Describe how the following substances exert their effects on the body: botulism; curare; tetrodotoxin; and nerve gas. Botulism is caused by botulinum toxin, produced by the bacterium Clostridium botulinum. The toxin inhibits acetylcholine release at the neuromuscular junctions. Characterized by m ...
... 2. Describe how the following substances exert their effects on the body: botulism; curare; tetrodotoxin; and nerve gas. Botulism is caused by botulinum toxin, produced by the bacterium Clostridium botulinum. The toxin inhibits acetylcholine release at the neuromuscular junctions. Characterized by m ...
STRUCTURE AND FUNCTION OF THE NERVOUS SYSTEM
... mechanisms of neurotransmitter exocytosis. Inhibition of exocytosis by specific toxins. Neurotransmitters: definition, structure and types of action. Biosynthesis, Precursors. Systems of inactivation, degradation and reuptake of neurotransmitters. The different neurotransmitters: Acetylcholine, Mono ...
... mechanisms of neurotransmitter exocytosis. Inhibition of exocytosis by specific toxins. Neurotransmitters: definition, structure and types of action. Biosynthesis, Precursors. Systems of inactivation, degradation and reuptake of neurotransmitters. The different neurotransmitters: Acetylcholine, Mono ...
Introduction to Anatomy
... pathways 3. Somatosensory cortex D. Physiology of motor pathways 1. Direct (pyramidal) pathways 2. Indirect (extrapyramidal) pathways ...
... pathways 3. Somatosensory cortex D. Physiology of motor pathways 1. Direct (pyramidal) pathways 2. Indirect (extrapyramidal) pathways ...
Chapter 15: Sense Organs
... Light Rays Enter the Eye More Divergent when Viewing Near Objects as Opposed to Parallel when Viewing Far Objects Means Light Rays Must be More Acutely Bent in Order to get them Focused on the Retina ...
... Light Rays Enter the Eye More Divergent when Viewing Near Objects as Opposed to Parallel when Viewing Far Objects Means Light Rays Must be More Acutely Bent in Order to get them Focused on the Retina ...
Synaptic Plasticity
... some pyramidal cells in the hippocampus have preferred spatial orientations fire in bursts ...
... some pyramidal cells in the hippocampus have preferred spatial orientations fire in bursts ...
unit 5: the nervous and endocrine systems
... THE ENDOCRINE SYSTEM.It is a collection of endocrine glands. They are called endocrine because they secrete internally. The substances they produce (hormones) are secreted directly into the bloodstream. Hormones travel through the bloodstream to the cells. Although all hormones reach all tissues, ea ...
... THE ENDOCRINE SYSTEM.It is a collection of endocrine glands. They are called endocrine because they secrete internally. The substances they produce (hormones) are secreted directly into the bloodstream. Hormones travel through the bloodstream to the cells. Although all hormones reach all tissues, ea ...
Document
... from nucleus raphe magnus neurons release -endorphin at their nerve endings. d. All of the above are true. 10. Massaging the skin or application of an irritant to the skin can suppress the Transmission of pain signals from the corresponding body area by suppressing the sensory fibers transmitting t ...
... from nucleus raphe magnus neurons release -endorphin at their nerve endings. d. All of the above are true. 10. Massaging the skin or application of an irritant to the skin can suppress the Transmission of pain signals from the corresponding body area by suppressing the sensory fibers transmitting t ...