This figure shows the muscles of facial expression. What muscle does number 4 indicate?
A. Orbicularis oris
B. Zygomaticus major
C. Risorius
D. Masseter
E. Buccinator
Answer: D
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The activity of alpha motor neurons innervating an extensor muscle can be inhibited by activation of the Golgi tendon organs in the tendon that attaches that muscle to bone.
Answer the following statement true (T) or false (F)
What is the major function of the axial skeleton?
A) provide central support for the body and protect internal organs B) provide a space for the major digestive organs C) provide an attachment point for muscles that allow movement D) give the body resilience
Natural analgesia occurs
a. when endogenous opiates bind to P-substance. b. when endogenous opiates bind to receptors on afferent pain fibers. c. when acute pain fibers are activated d. both (a) and (b) above. e. both (b) and (c) above.
Important functions of the skeletal system include
A. protection of the brain and soft organs. B. storage of water. C. production of Vitamin E. D. integration of other systems. E. regulation of acid-base balance.