What is the organ described as the mass of nerve tissue made up of about 100 billion neurons?

What is the organ described as the mass of nerve tissue made up of about 100 billion neurons?

• A. Brain
• B. Spinal Cord
• C. Cerebellum
• D. Peripheral Nerves

Answer: (A)

The brain is the mass of nerve tissue in the nervous system that contains about 100 billion neurons. It serves as the control center for thoughts, senses, memory, and voluntary actions. The spinal cord is also part of the nervous system but is mainly a transmission pathway and contains far fewer neurons. The cerebellum is a major brain region involved in balance and coordination, not the entire mass described. Peripheral nerves are bundles of nerve fibers outside the CNS, not a single mass of nerve tissue. So the brain best fits the description.

The brain is the mass of nerve tissue in the nervous system that contains about 100 billion neurons. It serves as the control center for thoughts, senses, memory, and voluntary actions. The spinal cord is also part of the nervous system but is mainly a transmission pathway and contains far fewer neurons. The cerebellum is a major brain region involved in balance and coordination, not the entire mass described. Peripheral nerves are bundles of nerve fibers outside the CNS, not a single mass of nerve tissue. So the brain best fits the description.