Facial muscles are unusual in that they
A. are not involved in movement.
B. insert and sometimes originate on skin and connective tissue.
C. are not involved in facial expression.
D. represent a combination of first-class and second-class lever systems.
E. are smooth muscles rather than skeletal muscles.
Answer: B
You might also like to view...
During which phase of an excitation-contraction cycle does depolarization occur?
A) Excitation B) Inhibition C) Contraction D) Relaxation
Each rod and cone cell of an eye monitors
A) specific colors or tones of black and white. B) objects at a specific range of distances from the observer. C) specific rates of movement of objects across the visual field. D) a specific receptive field. E) None of the answers are correct.
Premature infants are at risk of infant respiratory distress syndrome because of lack of
A. respiratory muscle strength (e.g., of the diaphragm). B. serous fluid between the pleurae. C. functional respiratory membrane cilia. D. surfactant, a lipoprotein secreted in alveoli. E. fluid clearance from airways.
Describe the alkaline tide
A) The alkaline tide is the activation of carbonic acid inside parietal cells. B) The alkaline tide is the release of intrinsic factor. C) The alkaline tide is the release of hormones that influence digestion. D) The alkaline tide is the sudden influx of bicarbonate ions into the bloodstream. E) The alkaline tide is the active transport of hydrogen ions into the gastric lumen.