Слайд 1 - Polymer
... • Most important and abused ecosystem in the world • Essential features – Species concept not useful – Feedback and feedforward coupling to dynamic environment is central – Functionality – Can’t measure much (anything) ...
... • Most important and abused ecosystem in the world • Essential features – Species concept not useful – Feedback and feedforward coupling to dynamic environment is central – Functionality – Can’t measure much (anything) ...
nervous system
... cell body and extend into the dendrites and axon. They serve to support the neuron (as neurofibrils) and to transport materials and organells down from the cell body to the axon (axon transport), for regeneration of damaged axons. Axon transport of certain materials also occurs in the opposite direc ...
... cell body and extend into the dendrites and axon. They serve to support the neuron (as neurofibrils) and to transport materials and organells down from the cell body to the axon (axon transport), for regeneration of damaged axons. Axon transport of certain materials also occurs in the opposite direc ...
Communication Workbook
... What can I do to improve: _____________________________________________________________ _____________________________________________________________ _____________________________________________________________ _____________________________________________________________ __________________________ ...
... What can I do to improve: _____________________________________________________________ _____________________________________________________________ _____________________________________________________________ _____________________________________________________________ __________________________ ...
Nervous and Muscular System
... those that can be contracted or relaxed at will – Involuntary muscles are regulated by the nervous and endocrine systems ...
... those that can be contracted or relaxed at will – Involuntary muscles are regulated by the nervous and endocrine systems ...
Neurophysiology: Sensing and categorizing
... elementary physical attributes, such as the orientation of visual edges, the frequency of an auditory tone, or the pressure of a somatosensory stimulus applied to the skin. Neural responses in these areas are thus largely independent of any perceptual category to which an object belongs. In contrast ...
... elementary physical attributes, such as the orientation of visual edges, the frequency of an auditory tone, or the pressure of a somatosensory stimulus applied to the skin. Neural responses in these areas are thus largely independent of any perceptual category to which an object belongs. In contrast ...
autonomic nervous system i
... 3. Reflex control of autonomic activity • Not under voluntary control • Reflexes are stereotyped responses triggered by specific sensory stimuli • Sensory stimuli that trigger autonomic reflexes do not reach consciousness • Autonomic reflexes are sensitive to & altered by emotional state ...
... 3. Reflex control of autonomic activity • Not under voluntary control • Reflexes are stereotyped responses triggered by specific sensory stimuli • Sensory stimuli that trigger autonomic reflexes do not reach consciousness • Autonomic reflexes are sensitive to & altered by emotional state ...
unit 5: the nervous and endocrine systems
... 2) Voluntary actions: These are than we do consciously. In a voluntary action, sensory information reaches the brain, and the brain modifies the response. THE ENDOCRINE SYSTEM.It is a collection of endocrine glands. They are called endocrine because they secrete internally. The substances they produ ...
... 2) Voluntary actions: These are than we do consciously. In a voluntary action, sensory information reaches the brain, and the brain modifies the response. THE ENDOCRINE SYSTEM.It is a collection of endocrine glands. They are called endocrine because they secrete internally. The substances they produ ...
Slide ()
... Central retinal artery occlusion. (A) A 62-year-old woman with a history of a previous stroke had sudden visual loss in her left eye. Her evaluation led to a diagnosis of embolic central retinal artery occlusion (CRAO). The funduscopic examination in the affected eye (pictured) shows narrowing of th ...
... Central retinal artery occlusion. (A) A 62-year-old woman with a history of a previous stroke had sudden visual loss in her left eye. Her evaluation led to a diagnosis of embolic central retinal artery occlusion (CRAO). The funduscopic examination in the affected eye (pictured) shows narrowing of th ...
Ativity 13 - PCC - Portland Community College
... • The cell body of a lower motor neuron is in the spinal cord and its termination is in a skeletal muscle. • The loss of lower motor neurons leads to weakness, twitching of muscle (fasciculation), and loss of muscle mass (muscle atrophy). “Flaccid Paralysis” ...
... • The cell body of a lower motor neuron is in the spinal cord and its termination is in a skeletal muscle. • The loss of lower motor neurons leads to weakness, twitching of muscle (fasciculation), and loss of muscle mass (muscle atrophy). “Flaccid Paralysis” ...
Nervous System Reading from SparkNotes
... Speeding Up the Action Potential Axons of many neurons are surrounded by a structure known as the myelin sheath, a structure that helps to speed up the movement of action potentials along the axon. The sheath is built of Schwann cells, which wrap themselves around the axon of the neuron, leaving sma ...
... Speeding Up the Action Potential Axons of many neurons are surrounded by a structure known as the myelin sheath, a structure that helps to speed up the movement of action potentials along the axon. The sheath is built of Schwann cells, which wrap themselves around the axon of the neuron, leaving sma ...
AUTONOMIC NERVOUS SYSTEM
... the autonomic nervous system such as smooth muscle around blood vessels. • Proceeds without conscious intention but can be influenced by volition. ...
... the autonomic nervous system such as smooth muscle around blood vessels. • Proceeds without conscious intention but can be influenced by volition. ...
3 Basic Nerve Cells
... The cerebral cortex, which is divided into right and left hemisp heres, encomp asses ab out two-thirds of the b rain mass and lies over and around most of the remaining structures of the b rain. It is the most highly develop ed p art of the human b rain and is resp onsib le for thinking, perceiving, ...
... The cerebral cortex, which is divided into right and left hemisp heres, encomp asses ab out two-thirds of the b rain mass and lies over and around most of the remaining structures of the b rain. It is the most highly develop ed p art of the human b rain and is resp onsib le for thinking, perceiving, ...
Cranial Nerves - Austin Community College
... Sulci and gyri = valleys and ridges on surface of cerebral hemispheres. Five lobes: Frontal, parietal, occipital, temporal and insula. ...
... Sulci and gyri = valleys and ridges on surface of cerebral hemispheres. Five lobes: Frontal, parietal, occipital, temporal and insula. ...
Document
... force water to follow. This is the only significant mechanism for getting water from one side of a membrane to the other. When you drink a fluid, it appears in the urine in a matter of hours. It has crossed membranes in your intestine to get into the bloodstream, crossed more membranes in your kidne ...
... force water to follow. This is the only significant mechanism for getting water from one side of a membrane to the other. When you drink a fluid, it appears in the urine in a matter of hours. It has crossed membranes in your intestine to get into the bloodstream, crossed more membranes in your kidne ...
The BRAIN - davis.k12.ut.us
... Repolarization phase Just split seconds after the opening of the sodium channels, the potassium channels in the axon membrane open. Since potassium is found in greater concentration within the cell, potassium ions rush outward. This flow of positively charged ions restores the positive charge outsid ...
... Repolarization phase Just split seconds after the opening of the sodium channels, the potassium channels in the axon membrane open. Since potassium is found in greater concentration within the cell, potassium ions rush outward. This flow of positively charged ions restores the positive charge outsid ...
Neuron Functioning
... toward the spinal cord and brain • Motor Neurons – send signals from your brain and spinal cord toward your body ...
... toward the spinal cord and brain • Motor Neurons – send signals from your brain and spinal cord toward your body ...
08 - Pierce College
... 53. At resting potential, voltage-gated Na+ and K+ channels are closed. a. True b. False 54. The amount of Na+ that enters through the postsynaptic membrane during the initiation of an action potential depends on: a. The type of channel that is opened (we need to open Na+ channels) b. The number of ...
... 53. At resting potential, voltage-gated Na+ and K+ channels are closed. a. True b. False 54. The amount of Na+ that enters through the postsynaptic membrane during the initiation of an action potential depends on: a. The type of channel that is opened (we need to open Na+ channels) b. The number of ...
spinal cord
... The gray matter contains the cell bodies of interneurons. Cell bodies in the dorsal horn form two sensory nuclei receiving somatic and visceral information. Cell bodies in the ventral horn form two efferent nuclei sending somatic and autonomic information. ...
... The gray matter contains the cell bodies of interneurons. Cell bodies in the dorsal horn form two sensory nuclei receiving somatic and visceral information. Cell bodies in the ventral horn form two efferent nuclei sending somatic and autonomic information. ...
How the Brain Works And Why it Probably Doesn`t Work this way!
... • In order to evaluate Neurological illness, the physician will observe the patient, listen to the patient, and examine the patient • The physician will look at the constellation of signs (what is found on examination) and symptoms (what the patient complains of) • The first step in the clinical eva ...
... • In order to evaluate Neurological illness, the physician will observe the patient, listen to the patient, and examine the patient • The physician will look at the constellation of signs (what is found on examination) and symptoms (what the patient complains of) • The first step in the clinical eva ...
A1982ND73700001
... mind. The work is still going on and the discoveries of the last years also represent an important contribution to the clinical diagnosis of nervous diseases. In 1973, I was invited to read a didactic lecture about VEPs at the Eighth International Congress of Electroencephalography and Clinical Neur ...
... mind. The work is still going on and the discoveries of the last years also represent an important contribution to the clinical diagnosis of nervous diseases. In 1973, I was invited to read a didactic lecture about VEPs at the Eighth International Congress of Electroencephalography and Clinical Neur ...
6419982_1441921514
... between the inside and outside of cells, each cell acts as a tiny battery with the positive pole outside the plasma membrane and the negative pole inside. The magnitude of this charge difference is measured in voltage. Although the voltage of this battery is very small (less than a tenth of a volt), ...
... between the inside and outside of cells, each cell acts as a tiny battery with the positive pole outside the plasma membrane and the negative pole inside. The magnitude of this charge difference is measured in voltage. Although the voltage of this battery is very small (less than a tenth of a volt), ...
What is a neuron?
... Schwann cells - supporting cells of the PNS that myelinate axons • Myelin sheath – whitish lipoprotein that surrounds and insulates the axon (nerve fiber) • Neurilemma - external layer containing bulk of cytoplasm with nucleus and organelles (cell membrane) ...
... Schwann cells - supporting cells of the PNS that myelinate axons • Myelin sheath – whitish lipoprotein that surrounds and insulates the axon (nerve fiber) • Neurilemma - external layer containing bulk of cytoplasm with nucleus and organelles (cell membrane) ...
7th sci Nervous System and Brain ppt nervous system and
... – Increases heart rate, bronchiole dilation, blood glucose, blood to skeletal muscle – “fight or flight” ...
... – Increases heart rate, bronchiole dilation, blood glucose, blood to skeletal muscle – “fight or flight” ...
Rheobase
Rheobase is a measure of membrane excitability. In neuroscience, rheobase is the minimal current amplitude of infinite duration (in a practical sense, about 300 milliseconds) that results in the depolarization threshold of the cell membranes being reached, such as an action potential or the contraction of a muscle. In Greek, the root ""rhe"" translates to current or flow, and ""basi"" means bottom or foundation: thus the rheobase is the minimum current that will produce an action potential or muscle contraction.Rheobase can be best understood in the context of the strength-duration relationship (Fig. 1). The ease with which a membrane can be stimulated depends on two variables: the strength of the stimulus, and the duration for which the stimulus is applied. These variables are inversely related: as the strength of the applied current increases, the time required to stimulate the membrane decreases (and vice versa) to maintain a constant effect. Mathematically, rheobase is equivalent to half the current that needs to be applied for the duration of chronaxie, which is a strength-duration time constant that corresponds to the duration of time that elicits a response when the nerve is stimulated at twice rheobasic strength.The strength-duration curve was first discovered by G. Weiss in 1901, but it was not until 1909 that Louis Lapicque coined the term ""rheobase"". Many studies are being conducted in relation to rheobase values and the dynamic changes throughout maturation and between different nerve fibers. In the past strength-duration curves and rheobase determinations were used to assess nerve injury; today, they play a role in clinical identification of many neurological pathologies, including as Diabetic neuropathy, CIDP, Machado-Joseph Disease, and ALS.