Sin e sentence uestions 1. What are the various examples of general senses? The
ID: 80695 • Letter: S
Question
Sin e sentence uestions 1. What are the various examples of general senses? The examples of general senses are: pain, touch, pressure, vibration and temperature 2. What are various special senses? Special senses include olfaction (smell, vision (sight), gustation (taste), equilibrium (balance) and hearing 3. What is decussation of fibers in the central nervous system? It is the crossing of axons from one side to another in the central nervous system 4. What is the phenomenon shown by sensory receptors called adaptation? It is a reduction in the sensitivity of a receptor to a constant presence of a stimulus 5. What is perception? It is the conscious awareness of a sensation 6. What are phasic receptors? They show rapid reduction in the sensitivity to the presence of stimulus. 7. What are tonic receptors? They show little or no reduction in the sensitivity to the constant presence of the stimulus 8. Which sensory perception is caused by the stimulation of nociceptors? Pain 9. What are higher order functions of the brain? Planning, learning and memories 10. What are short-term memories? These are memories that do not last long, but can be recalled immediately while they persist. 11. What are free nerve endings? These are branching tips of dendrites that are not protected by the accessory structures. [Insert class title]: [Insert unit name] Page 10Explanation / Answer
Answer to Q.2.: Motor cortex is a region in the frontal lobe of the cerebral cortex which controls the planning and execution of voluntary muscle movements. The primary motor cortex is the most important region, which generates the maximum nerve impulses to reach the spinal cord and carry out muscle movements. Hence, upon damage of the primary motor cortex, the ability to exert fine control over the muscles is lost.
However, there are other regions of the motor cortex, adjoining the primary motor cortex region which also play a role in voluntary actions. For eg.the premotor cortex and the supplementary motor area. Apart from the cerebral cortex, components of the nervous system such as cerebellum , basal ganglia and some speacilaized motor nuclei also help in partial cluntary movement after damage to the primary motor cortex.