Vertebrate Zoology Study Guide I. Taxonomy 1. Reasons for Taxonomy a. means of providing a systematic framework with which to work when studying the varied life forms inhabiting this earth b. establishes order from chaos c. Provides a system of nomenclature with which you label items (organisms) d. necessary when imagining trying to gather information on an unfamiliar organism e. Meant to provide a useful‚ convenient system using all evolutionary‚ adaptational‚ and anatomical aspects
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7 have been experimented. In inhibiting a Nerve Impulse‚ numerous physical factors and chemical agents can impair the ability of nerve fibers to function. In these activities they show this exactly. In these experiments‚ it showed the effects of various agents to nerve transmission. In testing the effects of ether‚ there will be a nerve that will be stimulated. The experiment is to see if ether has any permanent alteration in neural response of the nerve. I believe that it won’t because it has no
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The brachial plexus is a somatic nerve plexus formed by intercommunications among the ventral rami (roots) of the lower 4 cervical nerves (C5-C8) and the first thoracic nerve (T1). It lies partly in the neck and partly in the axilla. It is responsible for the motor innervation of all of the muscles of the upper extremity‚ with the exception of the trapezius and levator scapula. The brachial plexus supplies all of the cutaneous innervation of the upper limb‚ except for the area of the axilla (which
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The Oculomotor nerve functions in opening and moving the eye‚ constricts and focuses the pupil. It originates in the midbrain and passes through the superior orbital fissure of the sphenoid bone. TheTrochlear nerve causes the superior oblique to contract‚ thereby moving the eyeball inferiorly and laterally (Primal). Passes through the sphenoid bone through the superior orbital fissure. The Trigeminal nerve is composed of the ophthalmic‚ maxillary‚ and mandibular nerves. All three serve different
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Sannu’s Story A. In Sannu’s case why is there both sensory loss and muscle weakness? Leprosy is a disease that has been known since biblical times. It causes skin sores‚ nerve damage‚ and muscle weakness that gets worse over time. Leprosy is caused by the bacterium Mycobacterium leprae. It is not very contagious and it has a long incubation period (time before symptoms appear)‚ which makes it hard to know where or when someone caught the disease. Children are more likely than adults to get the
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E X E R C I S E 3 Neurophysiology of Nerve Impulses O B J E C T I V E S 1. To define the following terms: irritability‚ conductivity‚ resting membrane potential‚ polarized‚ sodium-potassium pump‚ threshold stimulus‚ depolarization‚ action potential‚ repolarization‚ hyperpolarization‚ absolute refractory period‚ relative refractory period‚ nerve impulse‚ compound nerve action potential‚ and conduction velocity. 2. To list at least four different stimuli capable of generating
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Exercise 3: Neurophysiology of Nerve Impulses Worksheet Assignment Due: Week 4 Student instructions: Follow the step-by-step instructions for this exercise found in your text and record your answers in the spaces below. Submit this completed document by the assignment due date found in the Syllabus. Please make sure that your answers are typed in RED. Please type your Name and Student ID Number here: Charles Coon 4048223 Eliciting a Nerve Impulse Activity 1: Electrical Stimulation
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Exercise 3: Neurophysiology of Nerve Impulses Worksheet Eliciting a Nerve Impulse Activity 1: Electrical Stimulation 1. Do you see any kind of response on the oscilloscope screen? No there was no response‚ the line was flat 2. What was the threshold voltage‚ or the voltage at which you first saw an action potential? 3.0V 3. How does this tracing compare to the one that was generated at the threshold voltage? At 3.5V the high & low peaks were just slightly above and below respectively
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The Worksheet Questions Table 1. The effects of phentolamine and atropine on the contractile response to nerve stimulation (20 Hz) in the isolated rabbit ileum | |Contraction amplitude |Contraction amplitude with the |Effect of nerve stimulation on the contraction amplitude | | |pre-nerve stimulation |maximum response to nerve | | | |
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through the microscope of the neuron‚ the ox spinal cord smear‚ and the teased myelinated nerve. Please describe what you observed on each slide. Questions A. What is the function of a neuron? To carry and transmit electrical impulses generated by both internal and external stimuli. B. What is the difference between a neuron and a nerve? Nerves are organizes bundles of nervous system cells. These bundles are assigned specific areas of
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