Where does digestion begin in the digestive system?
Stomach
Esophagus
Small intestine
Oral cavity
The Correct Answer is D
Digestion begins in the oral cavity, also known as the mouth, where food is ingested and broken down into smaller pieces through mechanical digestion by the teeth and chemical digestion by enzymes in saliva, such as amylase. Once the food is sufficiently broken down, it forms a bolus and is then swallowed, passing through the esophagus and into the stomach. In the stomach, the food is further broken down by stomach acid and enzymes before passing into the small intestine for the absorption of nutrients.
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Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
Dermal papillae are small, raised structures in the dermis of the skin. They contain nerve endings, capillaries, and other specialized cells. Dermal papillae are responsible for creating fingerprints, as they push up into the epidermis and create ridges on the surface of the skin. These ridges are what give each person their unique pattern of fingerprints. Sudoriferous glands are responsible for producing sweat, Merkel cells are involved in touch sensation, and arrector pili are responsible for the contraction of hair follicles
Correct Answer is A
Explanation
The ureters are long, narrow tubes that transport urine from the kidneys to the urinary bladder. Each kidney has one ureter, which emerges from the renal pelvis (a funnel-shaped cavity in the kidney) and descends downward, passing behind the peritoneum and along the back of the abdominal cavity. The ureters then enter the bladder through small openings at the base of the bladder, where they join with the urethra, a tube that carries urine out of the body.
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