Nokea
Concerning saliva:
- A. its secretion is under neural control only.
- B. its secretion is under hormonal control only.
- C. it is alkaline.
- D. Contains enzymes that digest proteins.
Correct Answer: C
Rationale: Step-by-step rationale:
1. Saliva is slightly acidic, not alkaline.
2. The secretion of saliva is under both neural and hormonal control.
3. Saliva contains enzymes that digest carbohydrates, not proteins.
4. Therefore, choice C is correct as it provides accurate information about the alkalinity of saliva.
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In which part of the alimentary canal does most digestion occur?
- A. stomach
- B. proximal small intestine
- C. distal small intestine
- D. ascending colon
Correct Answer: B
Rationale: The correct answer is B: proximal small intestine. Most digestion occurs in the proximal small intestine because it is where the majority of enzymes are secreted to break down food. This section also has a large surface area for absorption of nutrients. The stomach primarily breaks down food with acids, while the distal small intestine and ascending colon focus on absorption of nutrients and water, respectively.
An endoscopic biopsy of gastric mucosa reveals small intestinal type epithelium. This finding is most likely due to:
- A. chronic gastritis
- B. congenital heterotopia
- C. precancerous dysplasia
- D. metastatic carcinoma
Correct Answer: B
Rationale: The correct answer is B: congenital heterotopia. This is because the presence of small intestinal type epithelium in the gastric mucosa indicates ectopic tissue that is not normally found in the stomach. This condition is known as congenital heterotopia, where tissues from one organ are found in another due to developmental abnormalities.
A: Chronic gastritis would not lead to the presence of small intestinal type epithelium in the gastric mucosa.
C: Precancerous dysplasia refers to abnormal cellular changes that can progress to cancer but does not explain the presence of small intestinal type epithelium.
D: Metastatic carcinoma would involve the spread of cancer cells from another primary site, not the presence of ectopic tissue.
Which of the following is a major site of nutrient absorption?
- A. duodenum
- B. jejunum
- C. ileum
- D. colon
Correct Answer: B
Rationale: The correct answer is B: jejunum. The jejunum is a major site of nutrient absorption in the small intestine due to its extensive surface area and presence of villi and microvilli that facilitate absorption of nutrients like carbohydrates, proteins, and fats. The duodenum primarily functions in digestion, the ileum mainly absorbs vitamin B12 and bile salts, and the colon absorbs water and electrolytes. Therefore, the jejunum is the correct choice for being a major site of nutrient absorption.
The nurse is teaching a patient with diabetes about foot care. Which statement by the patient indicates that further teaching is needed?
- A. "I should wash my feet daily with warm water and mild soap."
- B. "I should inspect my feet daily for blisters, redness, or cuts."
- C. "I can use heating pads to warm my feet if they are cold."
- D. "I should trim my toenails straight across."
Correct Answer: C
Rationale: Correct Answer: C - "I can use heating pads to warm my feet if they are cold."
Rationale:
1. Using heating pads can cause burns or injuries due to reduced sensation in diabetic feet.
2. Patients with diabetes should avoid direct heat on their feet.
3. Optimal foot care for diabetics includes inspecting feet, washing with mild soap, and trimming nails correctly.
Summary:
A: Correct - Washing feet daily is recommended.
B: Correct - Inspecting feet daily is essential for early detection of issues.
C: Incorrect - Using heating pads can be harmful to diabetic feet.
D: Correct - Trimming toenails straight across is an appropriate practice.
In planning the post-operative care for a morbidly obese client, how can the expertise of the LPN/LVN best be applied?
- A. Obtain an oversized blood pressure cuff and a large-size bed.
- B. Set up a reinforced trapeze bar.
- C. Assist in the planning of bathing, turning, and ambulation.
- D. Design alternatives for routine tasks such as daily weights.
Correct Answer: C
Rationale: The correct answer is C because LPN/LVNs can assist in planning bathing, turning, and ambulation for a morbidly obese client. This is crucial in preventing complications such as pressure ulcers, deep vein thrombosis, and respiratory issues. LPN/LVNs can provide physical support and guidance to ensure the client's safety and comfort during these activities.
Choice A is incorrect because obtaining oversized equipment is not the primary role of LPN/LVNs. Choice B is also incorrect as setting up a reinforced trapeze bar is more of a facility management task. Choice D is incorrect as designing alternatives for routine tasks is not within the scope of practice for LPN/LVNs.