Pupil diameter would be increased by contraction of the ________.
A. radial muscles
B. superior rectus muscle
C. circular muscles
D. ciliary body
Answer: A
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The resistance to fatigue of fast fibers is ________ when compared to that of slow or intermediate fibers.
A. identical B. high C. low
Before beginning orthodontic treatment, a patient may have her wrist and hand x-rayed to determine her stage of growth. What feature of the long bones will the orthodontist use to assess this?
A. Osteon B. Periosteum C. Spongy bone D. Epiphyseal plate E. Compact bone
All cells (not just animal cells) have
a. mitochondria. b. a cell membrane. c. a cell wall. d. a nucleus. e. microtubules.
Which structure is a bundle of smooth muscle fibers that are attached to the hair follicle?
a. cuticle b. root c. medulla d. arrector pili