Exam 16: Spinal Cord and Spinal Nerves

This figure shows a cross section of a vertebra and the spinal cord.What structure does number 1 indicate?

Spinal nerves exit the vertebral canal and travel through an intervertebral foramen above or below the vertebra of the same number.The exception is

What is the correct order for the events that occur during a reflex? A: Impulse travels through sensory neuron to the CNS B: A stimulus activates a receptor C: Information is processed by interneurons D: Motor neuron transmits impulse to effector E: Effector responds

A typical spinal cord in an adult is

The spinal cord and spinal nerves are exclusively responsible for some reflexes.

What reflex flexes the toes when the inferior surface of the foot is stroked?

Following an injury to his arm,a patient complains that he has no sensations from the thumb,index finger,middle finger,and part of the ring finger.You suspect that he has damaged the

The anterior ramus of a typical spinal nerve innervates the

The lateral horns of the spinal cord contain

The simple knee-jerk reflex is an example of a(n)_____ reflex.

The thin strand of pia mater that helps to anchor the spinal cord to the coccyx is the

Which of these spinal nerve counts is incorrect?

In a lumbar puncture (spinal tap),fluid is extracted from the

The plexus that supplies the upper limbs is the _________ plexus.

This structure contains unmyelinated axons and serves as a communication route between the right and left sides of the gray matter in the spinal cord.

The plexus formed from the anterior rami of L4-S4 is the ________ plexus.

A diminished reflex response that may indicate damage to a segment of the spinal cord is a(n)_____ reflex.

The spinal cord allows for two-way communication between the brain and body.

The posterior ramus of a typical spinal nerve innervates the

This nerve receives sensation from the skin of the external genitalia.