Information Processing in the Spinal Cord

Question 1 of 4

Animation 44.4 Quiz

Sensory axons enter the spinal cord through the

dorsal roots.

ventral roots.

pons.

sympathetic ganglia.

Correct. See Key Concept 44.4 Neurons and Glia Form Information-Processing Circuits

Incorrect. See Key Concept 44.4 Neurons and Glia Form Information-Processing Circuits

Animation 44.4 Quiz

Which is a pathway that could be found in a reflex arc?

Sensory neuron, interneuron, brain, motor neuron, muscle

Sensory neuron, interneuron, motor neuron, muscle

Sensory neuron, motor neuron, interneuron, muscle

Sensory neuron, interneuron, muscle, motor neuron

Correct. See Key Concept 44.4 Neurons and Glia Form Information-Processing Circuits

Incorrect. See Key Concept 44.4 Neurons and Glia Form Information-Processing Circuits

Animation 44.4 Quiz

Interneurons

connect a sensory neuron and motor neuron.

determine whether a particular motor neuron is excited or inhibited.

are located throughout the body.

Both a and b

Correct. See Key Concept 44.4 Neurons and Glia Form Information-Processing Circuits

Incorrect. See Key Concept 44.4 Neurons and Glia Form Information-Processing Circuits

Animation 44.4 Quiz

A person with a spinal cord injury cannot voluntarily move their leg, yet a physician can elicit a jerking movement of the leg by gently tapping on the person’s knee. How can this be explained?

As a result of the injury, information is blocked from moving from the brain to the leg, but information can move from the leg to the brain.

The movement of leg muscles following tapping with a hammer does not result from neural stimulation.

The neural pathway involved in the leg movement does not pass through the spinal cord.

The part of the spinal cord involved in the neural circuitry that enables the leg to move is intact even though another region of the spinal cord is damaged.

Correct. See Key Concept 44.4 Neurons and Glia Form Information-Processing Circuits

Incorrect. See Key Concept 44.4 Neurons and Glia Form Information-Processing Circuits

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Chapter 1. Information Processing in the Spinal Cord