QUANTITATIVE / class 9 / set 4 / Passage Based MCQ Passage No. 1 Rachna has in her kitchen 17 spoons‚ 3 serving spoons‚ 22 quarter plates‚ 25 full plates‚ 11 forks‚ 2 lighters and 42 boxes. Some of these boxes contain spices‚ 7 of the boxes contain pulses and 4 boxes contain rice. Two boxes have ghee and three boxes have oil in them. In this way Rachna’s kitchen is full of variety of things. On the basis of your reading of the passage answer the questions given below : 1. How many utensils are
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neurons (gray matter) forming the cortex of the cerebrum. The cerebral cortex is responsible for higher functions of the nervous system‚ including voluntary muscle activity and learning‚ language‚ and memory. It is composed of neurons and axons. Define hemisphere as it relates to the brain The left side of the brain controls the functions of the right side of the body. That also includes controlling speech and language functions. This is to the left of the corpus callosum.
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Psychology chapter three vocabulary nervous system‚ a collection of hundreds of billions of specialized and interconnected cells through which messages are sent between the brain and the rest of the body. The nervous system consists of the central nervous system (CNS)‚ made up of the brain and the spinal cord‚ and the peripheral nervous system (PNS)‚ the neurons that link the CNS to our skin‚ muscles‚ and glands. And we will see that our behavior is also influenced in large part by the endocrine
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Each olfactory nerve cell binds on only one odor. In this way‚ the brain sorts the smells by which group of nerves is signaling. Since scents are complex‚ many different molecules and neurons will fire together to signal the brain for analysis. The axons of the olfactory receptor cells send signal to terminate the glomeruli. In each glomerulus‚ receptor cells carry scent information to the mitral cells. These mitral cells refine the scent information and send them to the brain to process. 9. A.The
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flow in the axon can be described by two main models‚ the Hodgkin-Huxley model and the Cable model. For myelinated fibers‚ we can use the Hodgkin-Huxley model for the nodes of Ranvier and the Cable model for the internode of the myelin sheath. For the unmyelinated axons‚ we can use just the Hodgkin-Huxley model by itself since there is no myelin sheath to interrupt the conductance described by the model. I will first discuss the current flow in the myelinated axon4. The myelinated axon is composed
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arrow and dragging it to point to the correct location: Dendrite‚ Axon‚ Cell Body‚ Myelin Sheath‚ Terminal Branches of the Axon Cell Body Dendrite Terminal Branches of the Axon Myelin Sheath Axon A Briefly describe the role each of the following play in neural communication: 1. Dendrite: branching neuron structures that receive neural impulses from other neurons and convey impulses toward the cell body 2. Axon: long tube like structure that conveys impulses away from the neurons
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Chapter 12: Neural Tissue - An Introduction to the Nervous System Learning Outcomes 12-1 Describe the anatomical and functional divisions of the nervous system. 12-2 Sketch and label the structure of a typical neuron‚ describe the functions of each component‚ and classify neurons on the basis of their structure and function. 12-3 Describe the locations and functions of the various types of neuroglia. 12-4 Explain how the resting potential is created and maintained. 12-5 Describe the events
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branch many times. One of the structures‚ however‚ is very thin and very long. This latter structure is most likely the neuron’s __________ ‚ which carries the __________. a. dendrite; efferent signal b. dendrite; afferent signal c. axon; action potential d. axon; receptors 2. If the myelin sheathing on neurons is absent or removed in a given individual‚ he or she will exhibit difficulties in speaking‚ vision‚ and balance because without myelin the a. quantity of neurotransmitters released
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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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1. What is a neuron? o The individual nerve cell‚ comprised of the axon‚ dendrites‚ and cell body. 2. How many neurons in the nervous system? o 86 billion 3. Function of cell body‚ dendrites‚ and axons. o Cell body: Contains the nucleus and other major components. o Dendrites: Branch out from the cell body and receive messages from other neurons. o Axons: Carries messages away from the cell body to the dendrites. 4. Define polarization/depolarization. o Polarization: Resting state of neuron
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