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Neurons
... Neuron- highly specialized cell that transmits electrical impulses Stephen M. Fowler ...
... Neuron- highly specialized cell that transmits electrical impulses Stephen M. Fowler ...
The Brain and Its Disorders
... • Soma (cell body) – contains nucleus, cytoplasm, organelles • Dendrites – receive info • Axon – transmits info • Myelin sheath – covers the axon to increase transmission speed (cause of sensory and motor disturbances in multiple sclerosis) ...
... • Soma (cell body) – contains nucleus, cytoplasm, organelles • Dendrites – receive info • Axon – transmits info • Myelin sheath – covers the axon to increase transmission speed (cause of sensory and motor disturbances in multiple sclerosis) ...
The Nervous System
... ● hyperpolarization: increase in the magnitude of the membrane potential ○ caused by opening of gated K+ channels ● depolarization: reduction of the magnitude of the membrane potential ○ caused by opening of gated Na+ channels ● graded potentials: changes in membrane potential ● threshold: a certain ...
... ● hyperpolarization: increase in the magnitude of the membrane potential ○ caused by opening of gated K+ channels ● depolarization: reduction of the magnitude of the membrane potential ○ caused by opening of gated Na+ channels ● graded potentials: changes in membrane potential ● threshold: a certain ...
The Nervous System and Senses
... The ear and balance • The semicircular canals (part of the cochlea) are also filled with fluid • As you move, the fluid moves and stimulates hair cells in the semicircular canals • They transmit impulses to the brain, which interprets them and orients your body ...
... The ear and balance • The semicircular canals (part of the cochlea) are also filled with fluid • As you move, the fluid moves and stimulates hair cells in the semicircular canals • They transmit impulses to the brain, which interprets them and orients your body ...
The Integumentary System
... Dermis is made of dense connective tissue Varies in thickness throughout the body ...
... Dermis is made of dense connective tissue Varies in thickness throughout the body ...
Prémio Artigo Destaque SPN_2011 Cellular and Molecular
... NeuroCentre Magendie (Bordeaux, France) PhD programme in Experimental Biology and Biomedicine (PhD BEB) University of Coimbra About the work Neurons are capable of integrating information spatially and temporally. They can process electrical signals at specific locations called synapses, which can b ...
... NeuroCentre Magendie (Bordeaux, France) PhD programme in Experimental Biology and Biomedicine (PhD BEB) University of Coimbra About the work Neurons are capable of integrating information spatially and temporally. They can process electrical signals at specific locations called synapses, which can b ...
The Nervous System - FW Johnson Collegiate
... - Central Nervous System – contains the brain and spinal cord - Peripheral Nervous System – carries information between the organs of the body and the central nervous system 2 Divisions of the Peripheral Nervous System: - Somatic Nerves – control the skeletal muscle, bones, skin, and sensory organs ...
... - Central Nervous System – contains the brain and spinal cord - Peripheral Nervous System – carries information between the organs of the body and the central nervous system 2 Divisions of the Peripheral Nervous System: - Somatic Nerves – control the skeletal muscle, bones, skin, and sensory organs ...
Presentation Package - faculty.coe.unt.edu
... The Motor Response • Each muscle fiber is innervated by only one neuron, but one neuron may innervate up to several thousand muscle fibers. • All muscle fibers within a motor unit are of the same fiber type. • Motor units are recruited in an orderly manner. Thus, specific units are called on each ti ...
... The Motor Response • Each muscle fiber is innervated by only one neuron, but one neuron may innervate up to several thousand muscle fibers. • All muscle fibers within a motor unit are of the same fiber type. • Motor units are recruited in an orderly manner. Thus, specific units are called on each ti ...
4-Taste and smell - Science-with
... Detection of a specific airborne chemicals that stimulates an olfactory cell to produce action potential that is perceived in the olfactory bulb. Olfactory receptor cells are neurons that line the upper portion of the nasal cavity Binding of odorant molecules to receptors triggers a signal tra ...
... Detection of a specific airborne chemicals that stimulates an olfactory cell to produce action potential that is perceived in the olfactory bulb. Olfactory receptor cells are neurons that line the upper portion of the nasal cavity Binding of odorant molecules to receptors triggers a signal tra ...
Action Potentials are - Winona State University
... -Leaking ions passing through gap junctions: Cardiac cells work this way • Step Two: Voltage gated channels detect a local change in membrane potential that was created (step 1) causing individual VG-Na+ channels to become open for only a few microseconds (Na+), before they close again! • Step Three ...
... -Leaking ions passing through gap junctions: Cardiac cells work this way • Step Two: Voltage gated channels detect a local change in membrane potential that was created (step 1) causing individual VG-Na+ channels to become open for only a few microseconds (Na+), before they close again! • Step Three ...
Ch 4: Synaptic Transmission
... presynaptic neurons When an AP reaches the terminal button, voltage-activated Ca2+ channels open & Ca2+ rushes in ◦ Ca2+ causes the vesicles to fuse with the membrane & release contents into the synaptic cleft ...
... presynaptic neurons When an AP reaches the terminal button, voltage-activated Ca2+ channels open & Ca2+ rushes in ◦ Ca2+ causes the vesicles to fuse with the membrane & release contents into the synaptic cleft ...
I can: State that the CNS is made up of the brain and the spinal cord
... Describe examples of reflex actions, for example the pupil of the eye becoming smaller in bright light to protect the sensitive cells at the back of the eye from damage ...
... Describe examples of reflex actions, for example the pupil of the eye becoming smaller in bright light to protect the sensitive cells at the back of the eye from damage ...
Biological Basis for Understanding Psychotropic Drugs
... Reality testing Memory Learning Social skills ...
... Reality testing Memory Learning Social skills ...
ANIMAL RESPONSES TO ENVIRONMENT
... Human Nervous system What to learn: • Structure of 3 types of neurons, nerve bundles transmission of an impulse (Making of drawings) ...
... Human Nervous system What to learn: • Structure of 3 types of neurons, nerve bundles transmission of an impulse (Making of drawings) ...
So it is the number of action potentials per second
... cations (potassium) to flow back in. 4. Eventually potassium would be entering the neuron at the same rate it is leaving. 5. Sodium is also moving across the membrane. There is a higher concentration outside the cell than inside so sodium moves into the cell. 6. This also would eventually end up at ...
... cations (potassium) to flow back in. 4. Eventually potassium would be entering the neuron at the same rate it is leaving. 5. Sodium is also moving across the membrane. There is a higher concentration outside the cell than inside so sodium moves into the cell. 6. This also would eventually end up at ...
Psychology 210
... Force 1: ________________________________: the idea that the concentration of a molecule tries to remain constant throughout the medium (substance) The Resting Potential Ex. Smells: the garbage begins to smell in one spot, but the smell slowly expands throughout the house The smell gets lighter and ...
... Force 1: ________________________________: the idea that the concentration of a molecule tries to remain constant throughout the medium (substance) The Resting Potential Ex. Smells: the garbage begins to smell in one spot, but the smell slowly expands throughout the house The smell gets lighter and ...
Brain 1
... The record indicates the rate of nerve firing measured in the postsynaptic neuron due to this initial experience. (b) After continued firing occurs due to repetitions of the experience, structural changes at the synapse occur that result in increased firing to the same stimulus. These changes in the ...
... The record indicates the rate of nerve firing measured in the postsynaptic neuron due to this initial experience. (b) After continued firing occurs due to repetitions of the experience, structural changes at the synapse occur that result in increased firing to the same stimulus. These changes in the ...
Ch11AB
... Graded potentials are _________________, ____________________ changes in the membrane potential. Graded potentials can be __________________or _______________________. The ___________________ of a graded potential varies directly (is graded) with stimulus strength. (Slide 10) The ___________________ ...
... Graded potentials are _________________, ____________________ changes in the membrane potential. Graded potentials can be __________________or _______________________. The ___________________ of a graded potential varies directly (is graded) with stimulus strength. (Slide 10) The ___________________ ...
Biology and Behaviour 40s
... • As each neurotransmitter crosses the synapse, it lands on specialized receptor cells on the dendrites of the next neuron. • The receptors then lower the action potential of the neuron. • As each neurotransmitter reaches a receptor, the action potential is lowered more and more until the threshold ...
... • As each neurotransmitter crosses the synapse, it lands on specialized receptor cells on the dendrites of the next neuron. • The receptors then lower the action potential of the neuron. • As each neurotransmitter reaches a receptor, the action potential is lowered more and more until the threshold ...
Inhibitory postsynaptic potential
... • Mechanisms in chronically epileptic tissue – Increased synaptic connectivity • mossy fiber sprouting ...
... • Mechanisms in chronically epileptic tissue – Increased synaptic connectivity • mossy fiber sprouting ...
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.