Which of the following is NOT properly matched?
A. cervical spinal nerves: 7 pairs
B. thoracic spinal nerves: 12 pairs
C. lumbar spinal nerves: 5 pairs
D. sacral spinal nerves: 5 pairs
E. coccygeal spinal nerves: 1 pair
Ans: A. cervical spinal nerves: 7 pairs
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Which of the following does mesenchyme give rise to?
A. Nervous tissue B. Muscle, bone, and blood C. The digestive organs and endocrine glands D. The reproductive and urinary systems E. The integumentary system and exocrine glands
Enzymes are necessary for digestion; ________ is produced to break down fats.
A. nuclease B. lipase C. carbohydrase D. maltase
Which of the following regions of the spinal cord contains a conspicuous enlargement?
a) filum terminale b) cervical region c) thoracic region d) sacral region e) coccygeal region
Which of the following is a function of astrocytes?
A. They circulate the cerebrospinal fluid. B. They produce cerebrospinal fluid. C. They phagocytize tissue debris. D. They help form the blood-brain barrier. E. They form myelin in the CNS.