Psychology Vocab. Words chapter 1 Psychology p.3: science of behavior and mental processes Bias p.5: beliefs that interfere with objectivity Law of Parsimony p.6: principle that simple explanations of phenomena are preferred to complex explanations Placebo Effect p.8: in drug research‚ positive effects associated with a person’s beliefs and attitudes about the drug‚ even when it contains no active ingredients. Scientific Method p.10: system of investigation in which a person makes a careful
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nervous system there would be no way to get information from the brain to the rest of the body; all the messages that our brain sends out must be sent though the nervous system through neuron communication. "Neurons communicate with each other using axons and dendrites. When a neuron receives a message from another neuron‚ it sends an electrical signal down the length of its axon. At the end of the axon‚ the electrical signal is converted into a chemical signal‚ and the axon releases chemical messages
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Review Sheet Results 1. Explain why increasing extracellular K+ reduces the net diffusion of K+ out of the neuron through the K+ leak channels. Your answer: If the extracellular K+ increases then the concentration of intracellular K+ will decrease causing a decrease in the steepness of the concentration gradient and fewer K+ ions would be drawn out. 2. Explain why increasing extracellular K+ causes the membrane potential to change to a less negative value. How well did the results compare
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norepinephrine are released in the body‚ they tend to bind to receptors‚ tissues and neurons. These neurotransmitters transfer signals throughout the nervous system and stimulates action potentials in the postganglionic neurons. Receptors found on the ANS and PNS includes the cholinergic receptors‚ which consists of all sympathetic and parasympathetic preganglionic‚ sympathetic postganglionic and all parasympathetic postganglionic neurons. The cholinergic receptors are found in the postsynaptic plasma membrane
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Alzheimer’s Disease | January 16 2013 | Alzheimer ’s disease is a progressive neurologic disease of the brain leading to the irreversible loss of neurons and the loss of intellectual abilities‚ including memory and reasoning‚ which become severe enough to impede social or occupational functioning. The brain is the center of the nervous system. It controls all of our nerves. The brain is also able to hold memory and language. Dementia is a loss of brain function that occurs with certain diseases
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at Austin. He is currently working on research relating to the connectivity between pre- and postsynaptic neurons. Dr. Nishiyama uses the cerebellum as a primary model system and a combination of scientific techniques and software to try and answer the questions he discussed in his seminar presentation. To begin his seminar‚ Dr. Nishiyama explained that the synaptic connections between neurons undergo constant structural remodeling from childhood
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1. Record the intracellular and extracellular concentrations of the following ions (mM/L): | Intracellular | Extracellular | Sodium (Na+) | 15 | 150 | Potassium (K+) | 150 | 5 | Chloride (Cl–) | 10 | 125 | 2. Excitable cells‚ like neurons‚ are more permeable to K+ than to Na+. 3. How would the following alterations affect the membrane permeability to K+? Use arrows to indicate the change in permeability. a. An increase in the number of passive K+ channels up b. Opening of voltage-gated
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Foundation of America‚ Alzheimer ’s Disease is a “progressive‚ degenerative disorder that attacks the brain ’s nerve cells‚ or neurons‚ resulting in the loss of memory‚ thinking‚ language skills‚ and behavioral changes” (www.alzfdn.org) With Alzheimer ’s disease‚ neuron cells are destroyed in the hippocampus‚ and this is what sparks the loss of short term memory; and as neuron cells die in the cerebral cortex‚ so too the functionality of language and clear thinking sees a marked decline in the
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Remember the basic functional unit of the brain is called the neuron – which is composed of the cell body‚ dendrite‚ and axon The dendrites are like branches with synapses for receiving messages. Axons take the impulses away from the cell bodies and may be covered with a lipid material – referred to as the myelin sheath…we’ll talk later about demyelinating diseases such as MS and Guillian Barre. Neurotransmitters – neurons generate and conduct electrical and chemical impulses by selectively
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thereby increase the concentration of serotonin molecules in the a. axon terminals. b. synaptic gaps. c. glial cells. d. endocrine glands. 1 out of 1 Correct! 3. The vast majority of neurons in the body’s information system are a. stem cells. b. interneurons. c. motor neurons. d. sensory neurons. 1 out of 1 Correct! 4. The release of epinephrine and norepinephrine ________ blood pressure and ________ blood sugar levels. a. raises; raises b. lowers; lowers c. raises; lowers
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