Question

You just cut yourself. Which statement best explains how the spinal cord is involved?

A) While sensory fibers do take the messages to the spinal cord, and motor fibers take the motor messages from the spinal cord, it is impossible to tell whether the dorsal root or ventral root is used unless we also know the location of the cut.
B) The message goes from the cut via the motor fibers to the ventral root of the spinal cord. The motor response message exits the spinal cord via sensory fibers from the dorsal root.
C) The message goes from the cut via the sensory fibers to the ventral root of the spinal cord. The motor response message exits the spinal cord via the dorsal root. The message goes from the cut via the sensory fibers to the dorsal root of the spinal cord.
D) The motor response message exits the spinal cord via the ventral root. The message goes from the cut via the motor fibers to the dorsal root of the spinal cord.
E)The motor response message exits the spinal cord using sensory fibers via the ventral root.

A) A is correct
B) A and C are correct
C) All are correct
D) A and E are correct

Answer 1

The spinal cord is involved in sensing a cut and initiating a motor response by transmitting sensory information through the dorsal root and sending motor commands out through the ventral root.

Step-by-step explanation:

When you cut yourself, the involvement of the spinal cord is essential for both sensing the injury and initiating a motor response. The correct statement about how the spinal cord is involved is: The message goes from the cut via the sensory fibers to the dorsal root of the spinal cord, and the motor response message exits the spinal cord via the ventral root. This means that sensory information from the cut is carried by sensory neurons, which enter the spinal cord through the dorsal root. The process for initiating a response to that sensory input involves motor neurons sending signals out through the ventral root to cause muscles to react, such as pulling your hand away from a sharp object that caused the cut.