Homework Answers
5. (a) The analgesics work by inhibiting the enzymes that synthesise prostagladins. The NSAIDs (Non-steroidal anti-inflammatory drugs) uses other peripheral and central mechanisms for their effect. The enzyme COX-2 is inhibited. This enzyme is present in the infalmmatory cells. This helps in maintaining the levels of COX-1 and COX-2 enzyme. COX-1 is a constiteunet of the normal cells. This maintainence of the levels of these two enzymes makes the analgesics work.
b. The mechanism of action of hyperalgesia involves the sensitization of nocireceptors, histamine, protons, nerve growth factors, and prostagladins.
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Question 1 Not yet answered Marked out of 12.50 Flag question What is encapsulation? What purpose is served by the encapsulation of some sensory nerve endings in the skin? 1 A- в І. Question 2 Answer saved Marked out of 12.50 p Flag question Center-Surround receptive fields in the retina are a mechanism to amplify stimuli with light- dark contrasts. Lateral inhibition in the somatosensory system has been proposed as a mechanism for amplifying the contrast of a stimulus. For...
Question 3 Not yet answered Marked out of 12.50 Flag question Where within the body can pain be modulated? What causes its modulation? 1 A B I Question 4 Not yet answered Marked out of 12.50 Flag question (a) Describe the two experiments done on the owl monkey somatosensory cortex. What were the conclusions about somatensory cortex plasticity? (b) Describe two analogous experiments in humans? What were the conclusions about human somatensory cortex plasticity? 1 A B I - EE
Not yet answered Question 7 Marked out of 12.50 P Flag question Where in the CNS does information about touch, shape, temperature, and pain converge? How does this relate to what we saw about parallel pathways in vision? 1 AB I 9 EE Answer saved Marked out of 19.50 Flat question Receptive field size Small Large Meissner's corpuscle Pacinian corpuscle Merkel's disk Ruffini's ending Consider the figure above describing the receptive fields for mechanoreceptors. (a) Which receptors are rapidly adapting?...
Question 5 Not yet answered Marked out of 4.00 P Flag question A photomenotaxis would describe a behavior in which an animal moves Select one: a. at a fixed angle relative to a light source b. straight toward a source of light c. by turning toward or away from a light source d. in an undirected way to search for cues from a light source e. by changing its rate of turning when it encounters a high light environment Question...
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