The correct answer is C. Spinal cord.
The spinal cord is a long, thin, tubular bundle of nervous tissue that extends from the brain down the back through the spinal canal. It is made up of millions of nerve fibers that carry messages between the brain and the rest of the body.
The spinal cord is responsible for controlling many of the body’s automatic functions, such as breathing, heart rate, and digestion. It also plays a role in movement, sensation, and reflexes.
Reflexes are involuntary actions that occur in response to a stimulus. For example, when you touch a hot stove, your hand will jerk away automatically. This reflex is controlled by the spinal cord, without any input from the brain.
The spinal cord is also responsible for transmitting messages from the brain to the muscles. These messages control voluntary movements, such as walking, talking, and eating.
The spinal cord is a vital part of the nervous system. It is responsible for controlling many of the body’s automatic functions, as well as movement, sensation, and reflexes.
The other options are incorrect because:
- The cerebrum is the largest part of the brain. It is responsible for higher-level functions such as thinking, planning, and decision-making.
- The cerebellum is located below the cerebrum. It is responsible for coordination and balance.
- Nerve cells are the basic units of the nervous system. They transmit messages between the brain and the rest of the body.