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- Question 1 of 10
1. Question
1 pointsCategory: nervous system1 which of the following statements are true about the spinal cord
I The lowest level of the central nervous system (CNS
II Continuous with the brainstem
III it exits the skull through the foramen magnumCorrectIncorrectThe lowest level of the central nervous system (CNS), anatomically and functionally, is the spinal cord . Continuous with the brainstem, it exits the skull through the foramen magnum . The spinal cord then passes through the vertebral canal of the vertebral column to the level of the first or second lumbar vertebrae.
- Question 2 of 10
2. Question
1 pointsCategory: nervous system2 which of the following are true about the spinal nerves
I There are a total of 31 pairs of spinal nerves
II exits the CNS through the intervertebral foramina
III there are 6 Sacral spinal nervesCorrectIncorrectThe spinal cord is divided into four anatomical regions: cervical, thoracic, lumbar, and sacral. These regions are named according to the vertebrae adjacent to them during embryonic development. Each region is subdivided into functional segments. A pair of spinal nerves extends from each segment (one nerve from the left side of the spinal cord and one nerve from the right ) and exits the CNS through the intervertebral foramina , or openings between adjacent vertebrae. There are a total of 31 pairs of spinal nerves:
• 8 Cervical
• 12 Thoracic
• 5 Lumbar
• 5 Sacral
• 1 Coccygeal - Question 3 of 10
3. Question
1 pointsCategory: nervous system3 which of the following are true about the pairs of spinal nerves
I 10 Cervical
II 5 Lumbar
III 1 CoccygealCorrectIncorrectThere are a total of 31 pairs of spinal nerves:
• 8 Cervical
• 12 Thoracic
• 5 Lumbar
• 5 Sacral
• 1 Coccygeal - Question 4 of 10
4. Question
1 pointsCategory: nervous system4 which section of the spinal nerve is involved with sensory perception and motor function of the back of the head, neck, and arms
I Lumbar
II Cervical
III SacralCorrectIncorrectSpinal nerves arising from the cervical level of the cord are involved with sensory perception and motor function of the back of the head, neck, and arms.
- Question 5 of 10
5. Question
1 pointsCategory: nervous system5 which of the following spinal nerves innervate the lower trunk, back, and legs
I thoracic
II lumbar
III sacralCorrectIncorrectNerves arising from the thoracic level innervate the upper trunk. Spinal nerves from the lumbar and sacral regions of the cord innervate the lower trunk, back, and legs. Lesions of the spinal cord interrupt sensation and motor function.
- Question 6 of 10
6. Question
1 pointsCategory: nervous system6 which of the following are true about the grey matter of the spinal cord
I composed of nerve cell bodies and unmyelinated interneuron fibers
II the gray matter is found internally
III white matter is found internallyCorrectIncorrectThe gray matter is composed of nerve cell bodies and unmyelinated interneuron fibers. The location of the gray matter in the spinal cord is opposite to that of the brain. In the brain, the gray matter of the cerebrum and the cerebellum is found externally forming a cortex, or covering, over the internally located white matter. In the spinal cord, the gray matter is found internally and is surrounded by the white matter
- Question 7 of 10
7. Question
1 pointsCategory: nervous system7 The spinal cord is funtions includes
I Conducts nerve impulses to and from the brain
II initiate reflex response
III Processes sensory input from the skin, joints, and musclesCorrectIncorrectThe spinal cord is responsible for two vital CNS functions. The cord:
• Conducts nerve impulses to and from the brain
• Processes sensory input from the skin, joints, and muscles of the trunk and limbs and initiates reflex responses to this input - Question 8 of 10
8. Question
1 pointsCategory: nervous system8 on each side of the spinal cord the gray matter is divided into
I Dorsal horn
II Ventral horn
III Lateral hornCorrectIncorrectAs such, on each side of the spinal cord the gray matter is divided into three regions:
• Dorsal horn (posterior, toward the back)
• Ventral horn (anterior)
• Lateral horn - Question 9 of 10
9. Question
1 pointsCategory: nervous system9 Each spinal segment contains which of the following types of neurons
I Second-order sensory neurons
II Somatic motor neurons
III Visceral motor neuronsCorrectIncorrectEach spinal segment contains millions of neurons within the gray matter.Functionally, four types of neurons exist:
• Second-order sensory neurons
• Somatic motor neurons
• Visceral motor neurons
• Interneurons - Question 10 of 10
10. Question
1 pointsCategory: nervous system10 The cell bodies ofsecond-order sensory neurons are found in
I Dorsal horn
II Ventral horn
III Lateral hornCorrectIncorrectThe cell bodies of second-order sensory neurons are found in the dorsal horn.
