All of the following are true of muscle tone except
A) exists for long periods of time
B) depends on multiple motor units contracting in phase with each other
C) helps maintain the head upright
D) Tension in the whole muscle remains constant.
Ans: B) depends on multiple motor units contracting in phase with each other
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The process of muscular activity that results in the forcible expulsion of the fetus from the uterus is called
A) development. B) placental expulsion. C) labor. D) birth, or parturition. E) None of the answers are correct.
Because bones are adaptable, their shapes reflect the ________ applied to them.
Fill in the blank(s) with the appropriate word(s).
A motor unit within the powerful quadriceps muscle would
A. contain several motor neurons. B. be much like those in the eye muscles. C. generally contain less than ten fibers. D. generally contain several hundred fibers.
Answer the following statements true (T) or false (F)
1. Senses can react to changes in both our internal and external environment. 2. Sensations of touch and pain are usually generated by special senses. 3. Equilibrium, temperature, and pressure are sensations generated by general sense organs. 4. Most of the free nerve endings are found in the epithelial layers of the body. 5. The sensation of taste and the perception of taste occur in different parts of the body.