Question

Which statement is correct regarding spinal nerves in man?

• A. They come out of vertebral column through foramen magnum.
• B. Each spinal nerve is formed within neural canal of vertebral column.
• C. There are 21 pairs of spinal nerves.
• D. They are sensory, motor and mixed types.

Hint:

There are 31 pairs of spinal nerves in humans, and they are formed within the neural canal of the vertebral column.

Answer 1

The Correct Option is B

Step 1: Understanding spinal nerves.
Spinal nerves are formed from the spinal cord and emerge from the vertebral column through the intervertebral foramina. They are classified as sensory, motor, or mixed, depending on their function.
Step 2: Analyzing the options.
(A) They come out of vertebral column through foramen magnum: Incorrect — The foramen magnum is where the spinal cord enters the skull, not where the spinal nerves exit.
(B) Each spinal nerve is formed within neural canal of vertebral column: Correct — Spinal nerves are formed within the spinal cord (neural canal) and exit through the intervertebral foramina.
(C) There are 21 pairs of spinal nerves: Incorrect — There are 31 pairs of spinal nerves in humans.
(D) They are sensory, motor and mixed types: Correct — Spinal nerves are classified as sensory, motor, or mixed, depending on their function.
Step 3: Conclusion.
The correct answer is (B) Each spinal nerve is formed within neural canal of vertebral column.