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Biology: The Unity and Diversity o...
Biology: The Unity and Diversity o...
Commands to move your right arm start in the ________ .
- a. left frontal lobe
- b. right occipital lobe
- c. right temporal lobe
- d. left parietal lobe
Introduction: The nervous system is concentrated in the head and is divided into the central nervous system (CNS) and peripheral nervous system (PNS). The central nervous system of humans includes the brain and the spinal cord. The peripheral nervous system consists of nerves that convey the information to and from the CNS. The cerebrum is the largest area of the forebrain. It is involved in receiving sensory signals, integrates information, and initiates involuntary actions. The cerebral cortex is divided into right and left hemisphere. Each half receives the information from and controls the movement of the opposite side of the body. The two hemispheres of the cerebral cortex differ in their function. A fissure called corpus callosum divides the cerebrum into the right and left hemispheres and relays signals between the two hemispheres.
Reasons for the correct statement:
Each cerebral hemisphere receives an input from and sends the commands to the opposite side of the body. The command to move the right arm originates in the motor cortex of the left frontal lobe of the left hemisphere.
Hence, option a. is correct.
Reasons for the incorrect statements:
Option b. is given as “right occipital lobe”. However, the right occipital lobe is the visual processing center of mammalian brain. Therefore, option b...
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