Which of the following is not a component of a reflex arc?
A. Somatic receptors
B. Afferent nerve fibers
C. Integrating center
D. Motor neurons in the cerebral cortex
E. Efferent nerve fibers
D. Motor neurons in the cerebral cortex
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Histamine's primary role in the respiratory system is as a
A) surfactant. B) vasodilator. C) bronchoconstrictor. D) vasoconstrictor. E) bronchodilator.
The blood clotting cascade is initiated by chemicals released by
A. fibroblasts in the vicinity of the broken blood vessel. B. pathogenic microorganisms in the area. C. normal cells in the vicinity of the broken blood vessel. D. injured tissues and platelets. E. red blood cells in the area.
Which of the following statements regarding lipid digestion and absorption is TRUE?
A. The presence of fatty acids in the duodenum stimulates the secretion of CCK, which in turn stimulates secretion of pancreatic enzymes. B. The presence of fatty acids in the duodenum stimulates the secretion of secretin, which in turn stimulates contraction of the gallbladder. C. The presence of fatty acids in the duodenum stimulates the secretion of gastrin, which in turn stimulates bile synthesis in the gallbladder. D. The presence of fatty acids in the duodenum stimulates emptying of the stomach. E. The presence of fatty acids in the stomach stimulates the secretion of secretin, which inhibits motility of the large intestine.
Age-related changes to the pubic symphysis make the os coxae a reliable indicator of age at death for skeletal remains
Indicate whether this statement is true or false.