Anatomy & Physiology

Anatomy & Physiology Study Guide

14.9 Chapter Fourteen Practice Exam 1. The ventral roots of each spinal segment ___________________. a. Bring sensory information into the spinal cord b. Control peripheral effectors c. Contain the axons of somatic motor and visceral motor neurons d. Do both B and C 2. Spinal nerves are called mixed nerves because they ___________________. a. Contain sensory and motor fibers b. Exit at intervertebral foramina c. Are associated with a pair of dorsal root ganglia d. Are associated with dorsal and ventral roots 3. The adult spinal cord extends only to ___________________. a. The coccyx b. The sacrum c. The third or fourth lumbar vertebra d. The first or second lumbar vertebra e. The last thoracic vertebra 4. Which of the following statements is false concerning the gray matter of the spinal cord? a. It is located in the interior of the spinal cord around the central canal b. It functions in processing neural information c. It is primarily involved in relaying information to the brain d. It contains motor neurons e. It is divided into regions called horns

5. The following are the steps in a reflex arc. Which is the proper sequence? 1. Activation of a sensory neuron 2. Activation of a motor neuron 3. Response by an effector 4. Arrival of a stimulus and activation of a receptor 5. Information processing a. 1, 3, 4, 5, 2 b. 4, 5, 3, 1, 2 c. 4, 1, 5, 2, 3 d. 4, 3, 1, 5, 2 6. A sensory region monitored by the dorsal rami of a single spinal segment is ___________________. a. A ganglion b. A fascicle c. A dermatome d. A ramus 7. The major nerve of the cervical plexus that innervates the diaphragm is the ___________________. a. Median nerve b. Axillary nerve c. Phrenic nerve d. Fibular nerve 8. The genitofemoral, femoral, and lateral femoral cutaneous nerves are major nerves of the ___________________. a. Lumbar plexus b. Sacral plexus c. Brachial plexus d. Cervical plexus 9. The synapsing of several neurons on the same postsynaptic neuron is called ___________________. a. Serial processing b. Reverberation c. Divergence d. Convergence Answer key found on page 366.

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