Nokea
What role does the pancreas play in digestion?
- A. producing bile
- B. producing enzymes
- C. storing nutrients
- D. absorbing vitamins
Correct Answer: B
Rationale: The correct answer is B: producing enzymes. The pancreas produces digestive enzymes such as amylase, lipase, and protease that help break down carbohydrates, fats, and proteins in the small intestine. These enzymes are crucial for proper digestion and nutrient absorption.
A: The pancreas does not produce bile. Bile is produced by the liver and stored in the gallbladder.
C: The pancreas does not store nutrients. Nutrient storage mainly occurs in the liver and adipose tissue.
D: The pancreas does not absorb vitamins. Vitamin absorption primarily takes place in the small intestine.
In summary, the pancreas plays a vital role in digestion by producing enzymes that aid in the breakdown of food components.
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A nurse is preparing to administer a medication via intramuscular (IM) injection. Which of the following sites is considered the safest for administering an IM injection?
- A. The dorsogluteal site
- B. The deltoid muscle
- C. The ventrogluteal site
- D. The vastus lateralis
Correct Answer: C
Rationale: The ventrogluteal site is considered the safest for IM injections due to the presence of fewer major blood vessels and nerves, reducing the risk of injury. The site is easily accessible and has a thick muscle mass suitable for medication absorption. To locate the ventrogluteal site, the nurse can ask the patient to lie on their side with the knee slightly flexed. The nurse should locate the greater trochanter and iliac crest, forming a V-shaped area where the injection is administered. The other choices are not as safe as the ventrogluteal site. The dorsogluteal site is not recommended due to proximity to the sciatic nerve and major blood vessels. The deltoid muscle is a smaller muscle and may not be suitable for all types of medications. The vastus lateralis site is more commonly used for pediatric patients or adults with limited muscle mass in other areas.
Patients with gastric ulcer typically exhibit the following symptoms:
- A. Epigastric pain worse after eating and weight loss.
- B. Epigastric pain worse before meals, pain awakening patient from sleep, and melena.
- C. Decreased bowel sounds, rigid abdomen, rebound tenderness, and fever.
- D. Boring epigastric pain radiating to back and left shoulder, bluish-gray discoloration of periumbilical area, and ascites.
Correct Answer: B
Rationale: Gastric ulcers typically present with epigastric pain that worsens before meals, pain that can wake the patient at night, and melena due to gastrointestinal bleeding.
Which patient is most likely to be diagnosed with short bowel syndrome?
- A. History of ulcerative colitis
- B. Had extensive resection of the ileum
- C. Diagnosed with irritable bowel syndrome
- D. Had colectomy performed for cancer of the bowel
Correct Answer: B
Rationale: Short bowel syndrome occurs most commonly in patients who have had extensive resections of the ileum, as the ileum is responsible for nutrient absorption.
Once absorbed into the epithelial cell of the small intestine, free fatty acids and glycerol are recombined and a protein coat is added to form a
- A. chylomicron.
- B. micelle.
- C. lipoprotein.
- D. fatty droplet.
Correct Answer: A
Rationale: The correct answer is A: chylomicron. After absorption, free fatty acids and glycerol are recombined in the epithelial cell to form triglycerides. These triglycerides are then packaged with proteins to form chylomicrons, which are lipoprotein particles that transport dietary fats through the lymphatic system and bloodstream. Chylomicrons are essential for the absorption of dietary fats and fat-soluble vitamins.
Summary:
- B: Micelle is incorrect because micelles are formed in the lumen of the small intestine to aid in the absorption of lipids but do not involve recombination of fatty acids and glycerol.
- C: Lipoprotein is incorrect because while chylomicrons are a type of lipoprotein, the specific process described in the question is not about general lipoprotein formation.
- D: Fatty droplet is incorrect as it does not involve the recombination and protein coating process described in the question.
Melena is an indication of:
- A. upper gastrointestinal bleeding
- B. lower gastrointestinal bleeding
- C. both
- D. neither
Correct Answer: A
Rationale: The correct answer is A: upper gastrointestinal bleeding. Melena is black, tarry stool resulting from the digestion of blood in the gastrointestinal tract. This typically occurs in the upper GI tract due to the longer transit time, allowing the blood to be digested. Lower GI bleeding usually presents as bright red blood in the stool or maroon-colored stool. Therefore, melena is a specific indicator of upper GI bleeding. Choices B, C, and D are incorrect because melena specifically points to upper GI bleeding, not lower GI bleeding or both.