Science+questions+page+82

Angela Corrao Science page 82, questions 1-5

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2. The central nervous system; which may also be called CNS includes your brain and spinal cord. It processes all incoming and out going messages. The peripheral nervous system; which may also be know as PNS consists of communication pathways or nerves, the connect all areas of your body to your CNS. The CNS connects to the PSN because the PSN has communication pathways that lead to all areas of your body.

3. If a spider is crawling up your left arm, then you will use your right hemisphere to knock it off.

4. Three major parts of the brain are cerebrum, cerebellum and the medulla. The cerebrum controls voluntary movements and allows you to detect touch, light, sound, odors, taste, pain, heat, and cold. Your cerebellum receives sensory impulses from skeletal muscles and joints. The cerebellum controls your balance. Your medulla receives sensory impulses from receptors in your blood vessels. It uses the information to regulate your blood pressure, and if your blood pressure gets too low the medulla sends out impulses that tell blood vessels to tighten up to increase the blood pressure. 5. A time that I had experienced a reflex was when I was cooking some macaroni, and I lifted the lid to the pot when a large cloud of steam came up and burned my arm. The natural reflex of that would be to quickly move your arm away from the cloud of steam and away from the oven or stove.