Question

Spinal cord originates from
A. Cerebrum
B. Medulla
C. Pons
D. Cerebellum

Answer 1

Hint:- The spinal cord is a long, extended soft tube-like structure that originates from the brain and continues till the end of the spine. It constitutes various nerves that carry signals for communication between the brain and the other parts of the body.

Complete answer:
The spinal cord is the center for all the reflexes. It is very fragile and is surrounded by three layers for protection. These layers along with the surface they cover run through the center of the spine.
Our brain is divided into three parts – The forebrain, midbrain, and hindbrain. The part of the brain present at the bottom (close to the spinal cord) is the Hindbrain. It has further three major portions, which are pons, cerebellum, and medulla. Pons connects different parts of the brain. Cerebellum has a convoluted surface that provides extra space to the neurons. The medulla is the lowest part which is connected to the spinal cord.

Additional information: The Spinal cord contains two major types of nerves i.e. motor nerves and sensory nerves. Similar to the brain, the spinal cord is also made up of gray and white matter. The center of the spinal cord is occupied by gray matter. There are two types of wings present in the spinal cord, these are front wings and back wings. Front wings carry motor nerve cells that transmit signals containing the information from the brain via the spinal cord to the muscles, whereas the back wings carry the sensory nerve cells which transmit information from the body to the brain via the spinal cord.

So the correct option is (B) Medulla.

Note:- In adult human beings, the spine is made up of 33 bones (vertebrae) forming a vertebral column. Just as the skull protects the brain, similarly vertebrae protect the spinal cord. It acts as a cushion reducing any force that could affect the spinal cord.