A 50-year-old woman was concerned about the appearance of "crow's-feet" by her eyes. She was told by her physician that these wrinkles were caused by years of squinting and blinking using which muscle?
a. frontal belly of occipitofrontalis
b. orbicularis oculi
c. risorius
d. orbicularis oris
b. orbicularis oculi
You might also like to view...
The pseudostratified columnar epithelium of the bronchi in smokers may transform into stratified squamous epithelium. This is an example of __________.
A. neoplasia B. metaplasia C. atrophy D. differentiation E. hyperplasia
Lungs are to the respiratory system as the spleen is to the
A) lymphatic system. B) urinary system. C) digestive system. D) cardiovascular system. E) muscular system.
Stimulus for the secretion of parathyroid hormone is a decrease in serum ________ levels.
A. phosphate B. Ca2+ C. calcitonin D. K+ E. Na+
Under normal circumstances, the wrist can be hyperextended, but the elbow cannot.
Answer the following statement true (T) or false (F)