21 which region of the brain is responsible for the

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21. Which region of the brain is responsible for the regulation of breathing and blood pressure? The neural regulation of breathing, blood pressure and other physiological parameters such as heartbeat, digestive secretions, peristaltic movements and transpiration is performed by the medulla. The medulla, together with the pons and the midbrain, is part of the brainstem. 22. Which region of the brain receives conscious sensory information?
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Which region of the brain triggers voluntary motor activity? In the brain, conscious sensory information is received by neurons located in a special region called the postcentral gyrus (or sensory gyrus). Gyri are the convolutions of the cerebrum. Each of the two postcentral gyri are located in one of the parietal lobes of the cerebrum. Voluntary motor activity (voluntary muscle movement) is commanded by neurons located in the precentral gyrus (or motor gyrus). Each of the two precentral gyri are located in one of the frontal lobes of the cerebrum. The names post- and pre-central refer to the fact that the motor and sensory gyri are spaced apart in each cerebral hemisphere by the sulcus centralis, a fissure that separates the parietal and frontal lobes. Nervous System Review - Image Diversity: sensory gyri motor gyri The Spinal Cord and Reflex Arc 23. What is the spinal cord? What elements make up the spinal cord? The spinal cord is the dorsal neural cord of vertebrates. It is the part of the central nervous system that continues into the trunk to facilitate the nervous integration of the whole body. The spinal cord is made of groups of neurons located in its central portion forming gray matter, and axon fibers in its
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exterior portion forming white matter. Neural bundles connect to both lateral sides of spinal cord segments to form the dorsal and ventral spinal roots that join to form the spinal nerves. Dorsal spinal roots contain a ganglion with neurons that receive sensory information; ventral spinal roots contain motor fibers. Therefore, dorsal roots are sensory roots and ventral roots are motor roots. The Nervous System Review - Image Diversity: spinal cord 24. Which regions of the brain are associated with memory? According to researchers, some of the main regions of the nervous system associated with the phenomenon of memory are the hippocampus, located in the interior portion of the temporal lobes, and the frontal lobe cortex, both of which are part of the cerebral hemispheres. 25. How can the fact that the motor activity of the left side of the body is controlled by the right cerebral hemisphere and the motor activity of the right side of the body is controlled by the left cerebral hemisphere be explained?1 The cerebral hemispheres contain neurons that centrally command and control muscle movements. These neurons are
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called superior motor neurons and are located in a special gyrus of both frontal lobes known as the motor gyrus (or precentral gyrus). These superior motor neurons send axons that transmit impulses to the inferior motor neurons of the spinal cord (for neck, trunk and limb movements) and to the motor
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  • Spring '16
  • kate

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