Exam 13: The Spinal Cord, Spinal Nerves, and Spinal Reflexes

Reflexes that activate muscles on the same side of the body as the stimulus are called

In a(n) ________ reflex, a sensory neuron synapses directly on a motor neuron.

In ________, one neuron synapses on several postsynaptic neurons.

Bill contracts a viral disease that destroys cells in the posterior gray horns in his spinal cord. As aresult, which of the following would you expect?

The gray horns of the spinal cord contain mainly

Figure 13-1 The Spinal Cord Use Figure 13-1 to answer the following questions: -Identify the structure labeled "9."

Suppose that you feel something brushing against your abdomen. The sensory information would be carriedtothe spinal cord over a(n) ________ ramus.

A motor neuron typically receives input from neurons that originate in various areas of the brain. Thistype of circuit is a

The most complicated spinal reflexes are called

The specialized membranes that surround the spinal cord are termed the

The spinal cord continues to elongate until about age

Figure 13-1 The Spinal Cord Use Figure 13-1 to answer the following questions: -Identify the structure labeled "1."

________ reflex has at least one interneuron placed between the sensory and motor neurons.

The white matter of the spinal cord is mainly

Each of the following nerves originates in the lumbar plexus except the ________ nerve.

In the condition ________, a virus infects posterior root ganglia, causing a painful rash whose distribution corresponds to that of the affected sensory nerves as seen in their dermatomes.

The neural "wiring" of a single reflex is called a(n)

A posterior and anterior root of each spinal segment unite to form a

The ________ innervates the ventrolateral body surface, structures in the body wall, and the limbs.

Figure 13-2 Spinal Nerves Use Figure 13-2 to answer the following questions: -Identify the structure labeled "2."