Which of the following is not a difference between DNA and RNA?
What will be an ideal response?
DNA contains alternating sugar-phosphate molecules whereas RNA does not contains sugars
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Duodenal endocrine cells
A) carry products of digestion that will not pass through the walls of blood capillaries. B) produce new cells for the mucosa of the small intestine. C) function in the absorption of nutrients, especially vitamin B12. D) secrete hormones that coordinate the activities of other digestive organs. E) secrete a watery intestinal juice that includes intrinsic factor and hydrochloric acid.
Following an injury to his arm, a patient complains that he has lost the ability to flex his elbow and supinate his forearm. Which nerve do you suspect he has damaged?
A. Musculocutaneous nerve B. Median nerve C. Axillary nerve D. Ulnar nerve E. Radial nerve
Regurgitation of food from the stomach into the esophagus:
A. is ordinarily inhibited by the upper esophageal sphincter. B. causes irritation of the esophageal mucosa. C. is called retropulsion, and is essential for gastric digestion. D. is ordinarily prevented by the pyloric sphincter. E. is called secondary peristalsis.
Label area "C" on the cerebral cortex.
A. Motor speech area (Broca area) B. Primary motor cortex C. Visual cortex D. Sensory speech area (Wernicke area) E. Primary somatosensory cortex