Which of the following is not a function associated with the spinal cord?
A. To conduct motor information down the cord
B. To conduct sensory information up to the brain
C. To coordinate the alternating contraction of several muscle groups associated with locomotion
D. To protect neurons in both the ascending and descending tracts
E. To mediate a reflex, such as the withdrawal of a hand from pain
Answer: D
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During fertilization, sperm bind to specific receptor sites on the surface of the
a. zona pellucida. b. corona radiata. c. plasma membrane of the ovum. d. polar body. e. oviduct.
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a. external intercostal muscles contract. b. internal intercostal muscles contract. c. external intercostal muscles relax. d. internal intercoastal muscles relax. e. abdominal muscles contract.
Which substance causes an increase in the blood calcium level?
A. Calcitonin B. Growth hormone C. Parathyroid hormone D. Sex hormones E. Vitamin D