An extension of a bone that is set at an angle to the rest of the bone is usually called a(n) ________.
A) sulcus
B) fossa
C) ramus
D) condyle
E) meatus
ramus
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Which statement regarding isometric contractions is true?
A) Tension rises during a contraction. B) The skeletal muscle's length changes. C) The tension produced never exceeds the load. D) Tension remains at a constant level until relaxation occurs. E) Examples are walking and running.
Chemicals that become ionic conductors when dissolved in water are called:
A. ions. B. exocytes. C. endocytes. D. electrolytes.
Hair, like the fingernails and toenails, is composed of a fibrous protein called ________.
A. antigen B. bilirubin C. collagen D. keratin
Which of the following statements is incorrect?
A) The contractions of skeletal muscles pull on tendons and move bones of the skeleton. B) Skeletal muscles are responsible for controlling the openings of the digestive and urinary tracts. C) Skeletal muscles are responsible for the pumping action of the heart. D) Skeletal muscles support the weight of some internal organs. E) Skeletal muscle contractions help maintain body temperature