see if ether will have an effect on eliciting an action potential which I believe that it will make it difficult. Curare is a well known plant extract that South American Indians used to paralyze their pray. It blocks synaptic transmission by preventing the flow of neural impulses from neuron to neuron (Laboratory Manual). I believe that the effect of curare eliciting an action potential will lead to curare not being able to act on an action potential because it will block and slow down the stimulation
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the terms depolarization and action potential mean the same thing? The terms depolarization and action potential differ because are excitable cells that communicate by transmitting electrical impulses that are capable of producing rapid electrical signals and depolarization in the interior surface of the membrane which becomes less negative and the exterior surface becomes less positive. Additionally‚ when depolarization reaches a certain threshold‚ an action potential is initiated and the polarity
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relaxation) 3. effects of increasing stim. Intensity on muscle force: forces increases then stays constant 1. Nervous Sys. I: Action Potential; Ion Channels; Membrane Potential 2. Nervoous Sys. II: Synaptic Potentials and Cellular Integration‚; Synaptic Transmission 3. Endocrine Sys.: Biochemistry‚ Secretion and Transport of Hormones; Actions of Hormones 4. Muscular Sys.: Neuromuscular Junction; Muscle Metabolism 5. CV Sys.: Cardiac Cycle; Measuring Blood Pressure; Cardiac Output
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Affirmative action ultimately fails in its attempt to address the social imbalance caused by past discrimination because it only treats the symptoms rather than the cause. Do you agree? A growing number of equality programs‚ also known as affirmative action‚ which include quotas‚ minority scholarships and job opportunities based on diversity‚ have been proposed by governments throughout the world‚ as measures to diminish the inherited discrimination towards different groups of our society. But what
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1. Compound action potentials can be graded responses. True 2. The sciatic nerve contains axons of both afferent and efferent neurones. True 3. The absolute refractory period of an action potential is the period after an initial stimulus when it is impossible to evoke another action potential with a second stimulus. True 4. The refractory periods of individual axons are important as they dictate the maximal action potential firing rate of a neuron. True 5. Compound action potentials represent the
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telodendria. terminals. mitochondria. neurosomes. vesicles. vesicles Most CNS neurons lack centrioles. This observation explains the ability of neurons to produce a resting potential. the ability of neurons to communicate with each other. why CNS neurons grow such long axons. the ability of neurons to generate an action potential. why CNS neurons cannot divide to regenerate damaged tissue. why CNS neurons cannot divide to
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Unit: Coordination and Control The human body is made up of many cells which form and create different tissues and organs within the body. Control and coordination are required to enable all functions within the body to work accordingly and appropriately at the specific times required. The system
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cleft is the space between the presynaptic and postsynaptic neuron. The arrival of an action potential normally causes the release of neurotransmitters from the presynaptic neuron. The action potential travels down to the axon terminal of the presynaptic neuron. Each axon terminal becomes swollen forming a presynaptic knob. There is a depolarisation of the presynaptic membrane resulting from the action potential. This depolarisation causes an increase in the permeability to sodium and calcium ions
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interact with the sodium ions inside the myelinated internodes and subsequently with the sodium ions in the next node of Ranvier‚ vastly speeding up the process of propagating the action potential5. This process can be modeled by a partial differential equation obtained from the Cable theorem and describes the potential across the myelin layer‚ found in Equation 1
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brain III. Nerve Impulse Conduction A. Resting Potential 1. positive charge outside a. high sodium ion concentration 1) sodium pump 2. negative charge inside a. phosphate & sulfate ions b. negatively charged proteins c. high potassium concentration 1) potassium pump 3. potential difference = -70 mV B. Potential changes 1. –70 mV to 0 = depolarization 2. higher than –70 mV = hyperpolarizing C. Action Potential occurs when Threshold Potential achieved 1. causes
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