Which of the following is the most important muscle used when a person's lips close around a drinking straw?
A. Risorius
B. Mentalis
C. Mylohyoid
D. Buccinator
E. Orbicularis oris
Answer: E. Orbicularis oris
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Which is not an effector innervated by the autonomic nervous system?
A. Cardiac muscle B. Smooth muscle C. Glands D. Skeletal muscle E. None of the choices is correct.
This figure shows a lymph node and its components. What structure is indicated by number 4?
A. Medullary cord B. Lymphatic nodule C. Hilum D. Trabecula E. Lymphatic sinusoid
The flexor __________ __________ is a muscle that allows the fingers to be curled into a fist because it attaches to distal phalanges II-V.
Fill in the blank(s) with the appropriate word(s).
The presence of fatty chyme in the small intestine stimulates it to release ________, which causes the ________.
A. gastrin; liver to secrete an alkaline solution B. secretin; stomach to increase motility C. CCK; gallbladder to release bile D. CCK; stomach to increase gastric secretion E. secretin; pancreas to release acidic pancreatic juice