Reflexes Activity 1 – Nerves Type the numbers‚ in the space provided‚ of the structures pointed out on the diagram of a cross section of a nerve in your lab book with the following terms: 6 axon 12 endoneurium 1 epineurium 2 fascicle 7 motor ending 10 myelin sheath 9 neurilemma 11 node of Ranvier 3 perineurium 5 peripheral nerve 8 Schwann cell 4 sensory receptors What is the difference between a nerve and a neuron? They are both completely different a nerve is a cord like organ
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clumsiness E. Wrist flexion Choice “B” is the best answer. The nerve that was most likely injured in this patient is the
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isolated sciatic nerve from a cane toad‚ Bufo marinus. Compound action potentials are the total sum of action potentials from the multitude of neurons that compose a nerve (Stillman‚ 2005).
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Chapter 8 Vocabulary in the power point slides. Starting on page 240: Afferent nerves-transmitters of nerve impulses toward the CNS; sensory nerves Analgesia-without sensitivity to pain Anesthesia-without feeling or sensation Aphasia-inability to communicate through speech‚ writing‚ or signs because of injury or disease to certain areas of the brain Arachnoid membrane-weblike middle layer of the three membranous layers surrounding the brain and spinal cord Ataxia-without muscular coordination
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(Generating) a Nerve Impulse 1. Why don’t the terms depolarization and action potential mean the same thing? Depolarization has to do with surfaces becoming more negative or positive and reaches a certain point called a threshold. When the threshold is reached‚ an action potential is initiated. 2. What was the threshold voltage in Activity 1? The threshold voltage in Activity 1 was 3.0. 3. What was the effect of increasing the voltage? How does this change correlate to changes in the nerve? There
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The brachial plexus is a network of spinal nerves. Spinal nerves carry information from peripheral sensory receptors to the spinal cord (of the central nervous system)‚ and then carry information back from the central nervous system to effector muscles and glands. The brachial plexus carries out these functions in the pectoral girdle and upper limbs. Specifically‚ nerves of the brachial plexus aid in innervation of the muscles of the upper limbs (with the exception of the trapezius and the levator
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Biology II 30 March 2012 The Comparison of Nervous Systems in Humans‚ Cnidarians‚ Flatworms‚ and Annelids The nervous system is one of the most important organ systems in the body. It is in charge of all of the things that happen within the body. Being responsible for receiving sensory input from internal and external stimuli‚ integrating and processing information‚ and generating output‚ it would be hard to survive without a nervous system; however‚ there are different types of nervous systems
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midwife. After a difficult vaginal delivery‚ the child was responsive and able to feed. When the child’s head is lifted and dropped gently‚ her right arm moves outward‚ but her left remains extended and near her side. Lead in: Which nerve is least
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Arachnoid mater: is the middle layer located on the inner surface of the dura‚ superficial to the pia. Pia mater: is the thin‚ innermost layer that adheres to the outer surface of the brain and spinal cord‚ and the origins of the cranial and spinal nerves. 3. What is cerebrospinal fluid and what is its function? CSF is a clear liquid that bathes the brain and spinal cord. CSF provides the brain and spinal cord with nutrients and helps to create a chemically stable environment. 4. Which meningeal layer(s)
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Membrane irritability is the ability to respond to stimuli and convert them into nerve impulses and conductivity is the ability to transmit an impulse (in this case‚ to take the neutral impulse and pass it along the cell membrane). 5. Why does the nerve’s action potential increase slightly when add 1.0 V to the threshold voltage and stimulate the nerve? The action potential increases slightly because the nerve consists of more than one neuron‚ therefore increasing the voltage increases the
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