Neuron Notes Neuron- Cells that carry messages throughout the
... 3. axons: (transmit/send signals) long fiber that carries impulses away from cell body. 4. myelin sheath: (lipids) insulating membrane around axon. There are small gaps in the myelin sheath along an axon called _nodes_____ Schwann Cells – individual cells of the myelin sheath 5. Axon Terminal- the e ...
... 3. axons: (transmit/send signals) long fiber that carries impulses away from cell body. 4. myelin sheath: (lipids) insulating membrane around axon. There are small gaps in the myelin sheath along an axon called _nodes_____ Schwann Cells – individual cells of the myelin sheath 5. Axon Terminal- the e ...
SELECT THE ONE BEST ANSWER OR COMPLETION 1. A function
... (B) excites the Golgi tendon organ (C) elicits contraction of intrafusal muscle fibers (D) inhibits nuclear bag fibers (E) antagonizes the reciprocal muscle 13. "ON" center bipolar cells (A) are hyperpolarized by the-neurotransmitter released from cone photoreceptor cells (B) are depolarized by glut ...
... (B) excites the Golgi tendon organ (C) elicits contraction of intrafusal muscle fibers (D) inhibits nuclear bag fibers (E) antagonizes the reciprocal muscle 13. "ON" center bipolar cells (A) are hyperpolarized by the-neurotransmitter released from cone photoreceptor cells (B) are depolarized by glut ...
The Neuron - Austin Community College
... After depolarization, the slower voltage-gated K+ channels open and K+ rapidly leaves the cell following its electrochemical gradient restoring resting membrane potential ...
... After depolarization, the slower voltage-gated K+ channels open and K+ rapidly leaves the cell following its electrochemical gradient restoring resting membrane potential ...
are involved in a few types of action potentials
... constantly at rates of up to 10-100 per second; some types, however, are much quieter, and may go for minutes or longer without emitting any action potentials ...
... constantly at rates of up to 10-100 per second; some types, however, are much quieter, and may go for minutes or longer without emitting any action potentials ...
General Physiology
... Homeostatic control systems are body components that generate compensatory regulatory responses to maintain relatively stable conditions of the internal environment • they are subject to nervous and endocrine control • homeostatic control systems have three components. They are: o detectors/sensors ...
... Homeostatic control systems are body components that generate compensatory regulatory responses to maintain relatively stable conditions of the internal environment • they are subject to nervous and endocrine control • homeostatic control systems have three components. They are: o detectors/sensors ...
Nervous System
... • If membrane potential becomes less negative, it has depolarized • Graded (or proportional) to intensity of stimulation, meaning the greater the stimulation, the greater the depolarization • if the depolarization is great enough, reach threshold potential ...
... • If membrane potential becomes less negative, it has depolarized • Graded (or proportional) to intensity of stimulation, meaning the greater the stimulation, the greater the depolarization • if the depolarization is great enough, reach threshold potential ...
3-2_UniqueFt_of_Neurons
... connect them to other neurons’ axons, the collections of them make the dendritic trees, most of the incoming information from other neurons go through the dendritic spines (small membranous protrusions from the dendrites) axon: one long (depends on the specie and the service site) cable-like project ...
... connect them to other neurons’ axons, the collections of them make the dendritic trees, most of the incoming information from other neurons go through the dendritic spines (small membranous protrusions from the dendrites) axon: one long (depends on the specie and the service site) cable-like project ...
1. If a significant amount of Cl - entered the body of a motor neuron
... 15. When the sodium potassium pump breaks down a molecule of ATP, ______ K+ ions are moved into the cell and ______ Na+ are moved out of the cell. a. 2-3 b. 3-2 c. 3-4 d. 4-3 e. None of the above 16. The influx of sodium will cause the membrane potential of a neuron to: a. Increase b. Decrease c. S ...
... 15. When the sodium potassium pump breaks down a molecule of ATP, ______ K+ ions are moved into the cell and ______ Na+ are moved out of the cell. a. 2-3 b. 3-2 c. 3-4 d. 4-3 e. None of the above 16. The influx of sodium will cause the membrane potential of a neuron to: a. Increase b. Decrease c. S ...
Nervous System – Ch 7
... Types of Neuroglial Cells: Microglial cells: scattered through CNS; support neurons and phagocytize bacterial cells and cell debris Oligodendrocytes: occur in nerve fibers; provide myelin around axons in brain and spinal cord Astrocytes: found between neurons and blood vessels; provide structural su ...
... Types of Neuroglial Cells: Microglial cells: scattered through CNS; support neurons and phagocytize bacterial cells and cell debris Oligodendrocytes: occur in nerve fibers; provide myelin around axons in brain and spinal cord Astrocytes: found between neurons and blood vessels; provide structural su ...
CHAPTER 4: Physical, Motor, and Sensory Development
... Understand how the brain develops and what this means for learning and early intervention. ...
... Understand how the brain develops and what this means for learning and early intervention. ...
The NERVOUS SYSTEM
... Carry impulses from the sensory receptors Cutaneous (skin) sense organs Proprioceptors – detect stretch or tension Sensory Motor (efferent) neurons Carry impulses from the central nervous system Interneurons (association neurons) • Are found in neural pathways in the central nervous system ...
... Carry impulses from the sensory receptors Cutaneous (skin) sense organs Proprioceptors – detect stretch or tension Sensory Motor (efferent) neurons Carry impulses from the central nervous system Interneurons (association neurons) • Are found in neural pathways in the central nervous system ...
Autonomic nervous system
... • Sympathetic axons reach target organs through ___________ and ______ _________ • Parasympathetic axons reach target organs through _____________ and _____ __________ • Remember _______ (________) _________ also travel via these nerves. ...
... • Sympathetic axons reach target organs through ___________ and ______ _________ • Parasympathetic axons reach target organs through _____________ and _____ __________ • Remember _______ (________) _________ also travel via these nerves. ...
Slide 1
... • Sympathetic axons reach target organs through ___________ and ______ _________ • Parasympathetic axons reach target organs through _____________ and _____ __________ • Remember _______ (________) _________ also travel via these nerves. ...
... • Sympathetic axons reach target organs through ___________ and ______ _________ • Parasympathetic axons reach target organs through _____________ and _____ __________ • Remember _______ (________) _________ also travel via these nerves. ...
What structures comprise the sympathetic division?
... • Sympathetic axons reach target organs through ___________ and ______ _________ • Parasympathetic axons reach target organs through _____________ and _____ __________ • Remember _______ (________) _________ also travel via these nerves. ...
... • Sympathetic axons reach target organs through ___________ and ______ _________ • Parasympathetic axons reach target organs through _____________ and _____ __________ • Remember _______ (________) _________ also travel via these nerves. ...
document
... The two sensory nerves helps to increase its sensitivity Also play a crucial role in maintaining posture and ...
... The two sensory nerves helps to increase its sensitivity Also play a crucial role in maintaining posture and ...
Slide 1
... • The minimum intensity of stimulus needed to generate an impulse • It does not matter if the stimulus is above the required strength the same message is sent • Message sent in all neurons is the same All or nothing Law – an impulse is only generated if the stimulus is at or above the threshold. ...
... • The minimum intensity of stimulus needed to generate an impulse • It does not matter if the stimulus is above the required strength the same message is sent • Message sent in all neurons is the same All or nothing Law – an impulse is only generated if the stimulus is at or above the threshold. ...
Senses powerpoint
... • 1. _adaptation__ - loss of sensitivity after exposure to a stimulus. • 2. _sensory adaptation_ - result of sensor fatigue , receptor becomes less sensitive to stimulus - smell has great adaptation E. Sensory Limitations • 1. there are many stimuli for which we do not have receptors • 2. stimuli ma ...
... • 1. _adaptation__ - loss of sensitivity after exposure to a stimulus. • 2. _sensory adaptation_ - result of sensor fatigue , receptor becomes less sensitive to stimulus - smell has great adaptation E. Sensory Limitations • 1. there are many stimuli for which we do not have receptors • 2. stimuli ma ...
Lab #6: Neurophysiology Simulation
... negative, and the membrane potential moves back towards the resting potential. Once the membrane potential is repolarized below threshold, the voltage-gated K+ channels close. Although the resting potential has been restored, the concentration gradients for Na+ and K+ are now different from resting ...
... negative, and the membrane potential moves back towards the resting potential. Once the membrane potential is repolarized below threshold, the voltage-gated K+ channels close. Although the resting potential has been restored, the concentration gradients for Na+ and K+ are now different from resting ...
13-2nd, 3rd, 4th & 6th cranial nerves
... sinus, lying below and lateral to the internal carotid artery. Then it enters the orbit through the superior orbital fissure. It supplies; the lateral rectus muscle which rotates the eye ball laterally ; (abduction). ...
... sinus, lying below and lateral to the internal carotid artery. Then it enters the orbit through the superior orbital fissure. It supplies; the lateral rectus muscle which rotates the eye ball laterally ; (abduction). ...
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.