puun Calied on by a ne ve im 7. Explain the roles sympathetic and parasympatheti

Question

puun Calied on by a ne ve im 7. Explain the roles sympathetic and parasympathetic nervous systems with re pect to homeostatic cardiac functions. 8. What are Schwan cells? Explain the role of Schwan cells in myelin sheath cegenera 9. Explain how memories are created, stored, and recalled, and distinguish among the l consciousness and unconsciousness. 10. Specify the components of the afferent and efferent divisions of the nervous system, a explain what is meant by the somatic nervous system. 11. Describe representative examples of cranial reflexes that produce somatic responses t cific stimuli. How are they relevant in clinical diagnosis, explain with one example. 12. Explain the process of visual adaptation involving bleaching and regeneration of visual pigments. How is this different in night blindness condition? 13. Explain why receptors respond to specific stimuli, and how the organization of a receptor affects its sensitivity 14. Summarize the effects of aging on the nervous system and give examples of interactions between the nervous system and other organ systems Check ur taxthaek for help. If using Internet, you must

Explanation / Answer

a receptoris a protein molecule that receives chemical signals from outside a cell. When such chemical signals bind to a receptor, they cause some form of cellular/tissue response, since there protein molecules protein molecules are very sensitive to the specific binding sites and allosteric group.

Organisation of proteins and basic derivatives define the function of the receptors there are many kind of receptors into the body for example a sensory receptor of the body .

Ampullae of Lorenzini (electroreceptors) electric fields, salinity, temperature Baroreceptors pressure in blood vessels Chemoreceptors chemical stimuli Hydroreceptors humidity changes Mechanoreceptors mechanical stress or mechanical strain Nociceptors damage to body tissues (which leads to pain perception) Osmoreceptors osmolarity of fluids Photoreceptors light Proprioceptors sense of position Thermoreceptors temperature, heat, cold or both Electromagnetic receptors electromagnetic waves Pacinian Corpuscles pressure on skin; weight of an object Meissner’s Corpuscle . Fine touch

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