Multiple Choice
Which condition is characterized by the presence of oligoclonal bands in cerebrospinal fluid (CSF) but not in serum?
275
views
12. The Central Nervous System
Introduction to the Central Nervous System
Struggling with Anatomy & Physiology?
Join thousands of students who trust us to help them ace their exams!Watch the first videoMultiple Choice
How many pairs of spinal nerves transmit sensory and motor messages to and from the spinal cord?
A
12 pairs
B
43 pairs
C
31 pairs
D
24 pairs
Verified step by step guidance1
Step 1: Understand the structure of the spinal cord and its role in transmitting sensory and motor messages. The spinal cord is divided into regions: cervical, thoracic, lumbar, sacral, and coccygeal.
Step 2: Recall that spinal nerves are paired, meaning there is one nerve on each side of the spinal cord for every segment. These nerves are responsible for transmitting sensory information to the spinal cord and motor commands from the spinal cord to the body.
Step 3: Learn the breakdown of spinal nerve pairs by region: cervical (8 pairs), thoracic (12 pairs), lumbar (5 pairs), sacral (5 pairs), and coccygeal (1 pair). Add these together to determine the total number of pairs.
Step 4: Use the formula to calculate the total number of spinal nerve pairs: \( \text{Total pairs} = 8 + 12 + 5 + 5 + 1 \). This will give the total number of spinal nerve pairs.
Step 5: Confirm that the correct answer is 31 pairs, as this is the sum of all spinal nerve pairs across the regions of the spinal cord.
1:32mWatch next
Master The Central Nervous System with a bite sized video explanation from Bruce Bryan
Start learningRelated Videos
Related Practice
Introduction to the Central Nervous System practice set
Problem sets built by lead tutorsExpert video explanations