Activity 1: Electrical Stimulation 1. Do you see any kind of response on the oscilloscope screen? NO 2. What was the threshold voltage‚ or the voltage at which you first saw an action potential? 3.0 V 3. How does this tracing compare to the one that was generated at the threshold voltage? The tracing travel in the same fashion but the tracing were different with an increase threshold voltage 4. What reason can you give for the change? Increase voltage 5. Record this maximal voltage here:
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BIOLOGY Are eyes enough to enjoy this natural splendour ...? Didn’t you notice the picture drawn by Raju and its caption? What is your opinion about the caption? You too might have got the opportunity to enjoy such scenes from nature. What have your blissful experiences in such situations been? — — — — — Colourful scenes The chirping of birds The gentle pat of the breeze The intoxicating fragrance of flowers The honey-sweetness of mango 7 BIOLOGY Though these are different experiences
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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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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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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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Example‚ if you touch a hot plate‚ your reflexes pull back your hand and your nerve simultaneously sends a pain signal to your brain. Sensory neuron take information from the skin to the brain. Freezing temperatures can affect the nerves causing the body to slow blood circulation to the hands and feet causing you to get a frostbite that means your nerves are frozen for a period of time. Tips
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