This essay will describe the electrochemical processes that allow an Action potential to occur in a neuron. This will be achieved by firstly‚ defining the purpose of neurons in the body along with a description of the components within a neuron and how they enable information to be passed through the cell membrane and on to other neurons. Secondly‚ the resting potential of a neuron will be explored with relation to the concept of selective permeability and the purpose of the Sodium - Potassium
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Though 45 years have passed since the end of Project MK-Ultra the name remains evident in the media of the United States today. The 1953-1975 experiments ran by the CIA are known to be one of the most notorious clandestine projects ever conducted to this date. Project MK-Ultra strived to gain a deeper understanding of the human mind through mind control. During the time the experiments were conducted‚ it was believed that mind control could be made possible by using the correct drug. The studies
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PHYSIOEX 9‚ ACTIVITY #3 Review Questions ACTIVITY #1 1. Explain why increasing extracellular K+ reduces the net diffusion of K+ out the neuron through the K+ leak channels? 2. Explain why increasing extracellular K+ causes the membrane potential to change to a less negative value. How well did the results compare with your predictions? 3. Explain why a change in extracellular Na+ did not significantly alter the membrane potential in the resting neuron? 4. Discuss the relative permeability
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the neuromuscular junction‚ which is the connection between the actual nerve fiber and muscle fiber. As the message to contract reaches the terminals a neurotransmitter‚ a chemical messenger for the body‚ is released into the gap between the terminal end‚ and the sarcolemma and motor end plate called the synaptic cleft. The particular neurotransmitter is called acetylcholine. Without acetylcholine muscles would not be able to contract. The acetylcholine then combines with receptors to stimulate movement
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neurons Nervous system consists of is divided into 1. which communicate across 2. 3. which is divided into which consists of which includes 4. 5. brain 6. autonomic nervous system using signal molecules called nerves which contains neurotransmitters 7. which contain which link sensory neurons to 8. which is divided into 9. 10. Copyright © by Holt‚ Rinehart and Winston. All rights reserved. Holt Biology 25 Nervous System Back Print TEACHER RESOURCE PAGE 2. Reaction times increase
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Addiction: “the number one health problem in America” the most common psychiatric problem on the planet In the past‚ the focus of treatment was on the absence of the treatment‚ but now it is on moderation. Reasons of using substances: to aid religious practices to explore the self to alter moods to treat disease to promote and enhance social interaction sharing drugs can be intimate like sharing food/coffee‚ etc. to enhance sensory experience and pleasure to stimulate artistic
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FALL 2011 Psychology 100 Final Exam Notes Greta Epstein Chapter 2: RESEARCH METHODOLOGY What is Scientific Inquiry? * A way of finding answers to empirical questions- questions that are answered by observing and measuring * 4 basic goals: * Describing what happens * Predicting when it happens * Controlling what causes it to happen * Explaining why it happens
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(synapse) where it stimulates the secretion of a particular neurotransmitter. The neurotransmitter acts as a chemical message able to bridge the fluid filled synaptic gap between neighbouring neurons so that communication between cells can occur. The amount of neurotransmitter released into the synaptic gap depends on the frequency of the incoming action potential. On reaching compatible receptors on the postsynaptic neuron the neurotransmitter has an effect on the neighbouring cells action potential
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1. Which was a fundamental problem with behaviorism? a. Not all learning comes from direct rewards b. Operant conditioning was not a valid form of learning c. Behaviorist methods were subjective d. None of the above 2. Which learning mechanism is based on rewarding and punishing voluntary behavior? a. Classical Conditioning b. Constructivism c. Rehearsal d. Operant conditioning 3. Which psychological theory maintains that the whole is greater than the sum of its parts? a. Associationism
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Chapter 2 Biology and Psychology MULTIPLE CHOICE 1. Which of the following would not be possible without the functioning of the nervous system? a. ideals‚ thoughts‚ and plans c. behaviors‚ emotions‚ and cognitions b. imagery and cognitions d. all of these ANS: D DIF: 2 REF: 2-26 OBJ: 1 MSC: TYPE: Conceptual 2. A(n) _________ is a nerve cell. a. axon c. dendrite b. neuron d. glial cell ANS: B DIF: 1 REF: 2-26 OBJ: 1 MSC: TYPE: Factual NOT: BTC 3. ________
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