Question

There are 5 lumbar pairs and sacral pairs of spinal nerves. How many pairs of spinal nerves are there in total?

1) 10
2) 12
3) 15
4) 20

Answer 1

There are five pairs of lumbar nerves and five pairs of sacral nerves, making a total of 10 pairs of spinal nerves for these regions combined.

Step-by-step explanation:

The question asks to calculate the total number of pairs of spinal nerves by combining the pairs of lumbar and sacral nerves. As explained, the human spine has several pairs of spinal nerves. Specifically, there are five pairs of lumbar nerves, denoted as L1 to L5, and five pairs of sacral nerves, denoted as S1 to S5. To find the total number of pairs of spinal nerves for the lumbar and sacral regions, we simply add the number of pairs together: 5 pairs of lumbar nerves + 5 pairs of sacral nerves = 10 pairs of spinal nerves.