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” ...
biopsychology-2-synaptic-transmission
... • Each neurotransmitter has its own specific molecular structure that fits perfectly into a post-synaptic receptor site, similar to a lock and a key. • When the right key (i.e. neurotransmitter) meets the right lock (i.e. receptor) a specific ion channel in the membrane is opened. • Ions then flow t ...
... • Each neurotransmitter has its own specific molecular structure that fits perfectly into a post-synaptic receptor site, similar to a lock and a key. • When the right key (i.e. neurotransmitter) meets the right lock (i.e. receptor) a specific ion channel in the membrane is opened. • Ions then flow t ...
Chapter Two - Texas Christian University
... polarity which results in a graded potential. When there are enough graded potentials in succession, channels open allowing positive ions from the outside to enter the interior of the neuron. Entrance of the positive ions into the cell body depolarizes the neuron, changing the interior from negative ...
... polarity which results in a graded potential. When there are enough graded potentials in succession, channels open allowing positive ions from the outside to enter the interior of the neuron. Entrance of the positive ions into the cell body depolarizes the neuron, changing the interior from negative ...
Physiology of Aging: Clinical Aspects
... Muscle/Tendon • reduction in size and number of mitochondria hence decrease in available energy • decrease in substances to supply energy (ATP, creatine phosphate and glycogen) ...
... Muscle/Tendon • reduction in size and number of mitochondria hence decrease in available energy • decrease in substances to supply energy (ATP, creatine phosphate and glycogen) ...
see p. D20 - Viktor`s Notes for the Neurosurgery Resident
... Fibrillation potential - biphasic (or triphasic) discharge with positive onset (except in endplate region); represents action potential generated in single muscle fiber (so cannot be detected by clinical examination). amplitude up to 300 µV, short duration ≤ 5 msec, frequency ≤ 20 Hz. usually ...
... Fibrillation potential - biphasic (or triphasic) discharge with positive onset (except in endplate region); represents action potential generated in single muscle fiber (so cannot be detected by clinical examination). amplitude up to 300 µV, short duration ≤ 5 msec, frequency ≤ 20 Hz. usually ...
ch13
... provides sensory input to the CNS via one pair of spinal nerves or the trigeminal nerve. ...
... provides sensory input to the CNS via one pair of spinal nerves or the trigeminal nerve. ...
Unit III Modules 9 to 13 Test Review
... – the level of stimulation required to trigger a neural impulse ...
... – the level of stimulation required to trigger a neural impulse ...
The left hemisphere
... The peripheral nervous system is everything else. The autonomic nervous system is a part of the peripheral nervous system, and it is the part that regulates functions that run without our conscious control, such as breathing, heart rate, and digestion. ...
... The peripheral nervous system is everything else. The autonomic nervous system is a part of the peripheral nervous system, and it is the part that regulates functions that run without our conscious control, such as breathing, heart rate, and digestion. ...
Spinal_Cord_Power_Point
... provides sensory input to the CNS via one pair of spinal nerves or the trigeminal nerve. ...
... provides sensory input to the CNS via one pair of spinal nerves or the trigeminal nerve. ...
Review
... Role of acetylcholine, synaptic cleft, interstitial fluid Depolarization vs. repolarization Role of calcium during muscle contraction Role of acetylcholinesterase Energy sources for muscle contraction o Role of creatine phosphate o Purpose of glycolysis o Aerobic system Fate of pyruvic acid Prod ...
... Role of acetylcholine, synaptic cleft, interstitial fluid Depolarization vs. repolarization Role of calcium during muscle contraction Role of acetylcholinesterase Energy sources for muscle contraction o Role of creatine phosphate o Purpose of glycolysis o Aerobic system Fate of pyruvic acid Prod ...
Chapter 48 Nervous Systems
... Gated Na+ channels open, Na+ diffuses into the cell, and the inside of the membrane becomes less negative. These changes in membrane potential are called graded potentials because the magnitude of the change—either hyperpolarization or depolarization—varies with the strength of the stimulus. A l ...
... Gated Na+ channels open, Na+ diffuses into the cell, and the inside of the membrane becomes less negative. These changes in membrane potential are called graded potentials because the magnitude of the change—either hyperpolarization or depolarization—varies with the strength of the stimulus. A l ...
B6 Brain and Mind revised - Blackpool Aspire Academy
... System Involuntary Conditioned Response Behaviour ...
... System Involuntary Conditioned Response Behaviour ...
HERE
... Click on the “Other Cells in the Brain” link and answer the following questions: 5. There are about ______________ neurons in the brain as well as ______________ of support cells called _____________________. 6. There are 3 types of glial cells. Name each of the 3 and explain their function: 1. ____ ...
... Click on the “Other Cells in the Brain” link and answer the following questions: 5. There are about ______________ neurons in the brain as well as ______________ of support cells called _____________________. 6. There are 3 types of glial cells. Name each of the 3 and explain their function: 1. ____ ...
How is the stimulus represented in the nervous system?
... the neuron represents are those that induce a change in its responses. The stimuli ...
... the neuron represents are those that induce a change in its responses. The stimuli ...
THE PHYSICAL BASIS FUNCTION OF NEURONAL
... Axons (also called nerve fibers) are specialized processes that conduct signals away from the cell body. Although many neurons have relatively short axons, the axons of some nerve cells extend surprisingly long distances. Axons have evolved mechanisms that allow them to carry information for long di ...
... Axons (also called nerve fibers) are specialized processes that conduct signals away from the cell body. Although many neurons have relatively short axons, the axons of some nerve cells extend surprisingly long distances. Axons have evolved mechanisms that allow them to carry information for long di ...
Biology and Behaviour 40s
... • These gates quickly close and K+ ions slowly leak out and the cell begins to actively pump Na+ ions back out. • This returns the cell to it’s resting state. • The depolarization of the cell produces electric currents that stimulate the threshold value in neighboring regions as the impulse travels ...
... • These gates quickly close and K+ ions slowly leak out and the cell begins to actively pump Na+ ions back out. • This returns the cell to it’s resting state. • The depolarization of the cell produces electric currents that stimulate the threshold value in neighboring regions as the impulse travels ...
neurology_lec13_9_5_2011 - Post-it
... ** binuclear vision …> by 2 eyes *** what you see by your right eye goes to your left side of cortex and via verse . Images at the cortex are inverted .. how it’s modified ?? … it’s still not well understood mechanism . The pupillary light reflex is a reflex that controls the diameter of the pupil, ...
... ** binuclear vision …> by 2 eyes *** what you see by your right eye goes to your left side of cortex and via verse . Images at the cortex are inverted .. how it’s modified ?? … it’s still not well understood mechanism . The pupillary light reflex is a reflex that controls the diameter of the pupil, ...
doc nervous system notes
... body to indicate health of the axon to stimulate the release of growth factors. Unfortunately viruses (polio, rabies, herpes) or tetanus toxins can use the retrograde movement to attack the cell body. Axon can be wrapped by myelin sheath which insulates the neuron. Classification of Neurons: Structu ...
... body to indicate health of the axon to stimulate the release of growth factors. Unfortunately viruses (polio, rabies, herpes) or tetanus toxins can use the retrograde movement to attack the cell body. Axon can be wrapped by myelin sheath which insulates the neuron. Classification of Neurons: Structu ...
Biopsychology 2012 – sec 002
... The study of the effects of drugs on the nervous system and on behavior. What is a drug? An exogenous chemical not necessary for normal cellular functioning that significantly alters the functions of certain cells of the body when taken in relatively low doses (in this context, cells of the nervous ...
... The study of the effects of drugs on the nervous system and on behavior. What is a drug? An exogenous chemical not necessary for normal cellular functioning that significantly alters the functions of certain cells of the body when taken in relatively low doses (in this context, cells of the nervous ...
Powerpoint
... of Corti, investigation on senses (0.75 hr) The sensory functions of skin (0.5 hr) The structure and functions of different types of neurone (0.5 hr) Nerve impulse - generation and transmission of nerve impulse, the role of sodium and potassium ions, production of resting and action potentials, all- ...
... of Corti, investigation on senses (0.75 hr) The sensory functions of skin (0.5 hr) The structure and functions of different types of neurone (0.5 hr) Nerve impulse - generation and transmission of nerve impulse, the role of sodium and potassium ions, production of resting and action potentials, all- ...
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.