Nokea
How many teeth will be produced in an average lifetime?
- A. 20
- B. 32
- C. 30
- D. 52
Correct Answer: B
Rationale: The correct answer is B: 32. An average adult human has 32 permanent teeth, including 8 incisors, 4 canines, 8 premolars, and 12 molars. These teeth are developed during childhood and adolescence and are meant to last a lifetime, barring any dental issues. Option A (20) is too low for adult teeth count, C (30) is close but incorrect, and D (52) is too high and includes extra teeth, such as wisdom teeth which not everyone develops.
You may also like to solve these questions
Hemolytic jaundice is:
- A. Caused by more fragile RBCs.
- B. Caused by liver damage.
- C. Characterized by low bilirubin in urine.
- D. All of the above are incorrect.
Correct Answer: A
Rationale: The correct answer is A: Hemolytic jaundice is caused by more fragile RBCs. When red blood cells are destroyed at an increased rate, it leads to the release of more bilirubin, causing jaundice. Choice B is incorrect because liver damage leads to hepatocellular jaundice, not hemolytic. Choice C is incorrect as hemolytic jaundice is characterized by high bilirubin levels in the blood, not low levels in urine. Choice D is incorrect as option A is the correct explanation for hemolytic jaundice.
Which part of the digestive system is responsible for the absorption of nutrients?
- A. small intestine
- B. stomach
- C. pancreas
- D. liver
Correct Answer: A
Rationale: The correct answer is A, the small intestine, because it is the primary site for nutrient absorption in the digestive system. The small intestine is lined with villi and microvilli, increasing its surface area for efficient absorption. It contains specialized cells that transport nutrients into the bloodstream for distribution to the body. The stomach (B) primarily breaks down food using digestive enzymes and acids, while the pancreas (C) secretes digestive enzymes but does not directly absorb nutrients. The liver (D) plays a role in bile production and detoxification, but nutrient absorption occurs mainly in the small intestine.
The most common cause of tooth loss in adults is
- A. periodontal disease.
- B. gingivitis.
- C. pyorrhea.
- D. dental caries.
Correct Answer: A
Rationale: The correct answer is A: periodontal disease. Periodontal disease is the most common cause of tooth loss in adults due to the severe damage it causes to the supporting structures of the teeth, such as the gums and bone. It leads to progressive destruction of the tissues surrounding the teeth, eventually resulting in tooth loss. Gingivitis (B) and pyorrhea (C) are stages of periodontal disease and not the primary cause of tooth loss. Dental caries (D) primarily affects the enamel and dentin of the teeth, leading to cavities, but it is not as common a cause of tooth loss in adults as periodontal disease.
The nurse is teaching a patient with hypertension about lifestyle modifications. Which statement by the patient indicates that further teaching is needed?
- A. "I will reduce my intake of processed foods and sodium."
- B. "I will engage in regular physical activity, such as walking."
- C. "I will limit my alcohol intake to no more than two drinks per day."
- D. "I can stop taking my blood pressure medication when I feel better."
Correct Answer: D
Rationale: The correct answer is D because stopping blood pressure medication without medical guidance can be dangerous and worsen hypertension. A is correct as reducing sodium intake helps lower blood pressure. B is correct as physical activity is beneficial. C is incorrect, as limiting alcohol intake is also important in managing hypertension.
The function of the migrating motor
- A. is to:
- B. Empty non-digestable material from stomach and small intestine during fasting
- C. Initiate mass movements in the large intestine
- D. Increase intestinal peristalsis in response to overfeeding
Correct Answer: B
Rationale: The migrating motor complex (MMC) functions to clear non-digestible material from the stomach and small intestine during fasting periods. Step 1: During fasting, MMC promotes gastrointestinal motility to prevent bacterial overgrowth. Step 2: MMC consists of 3 phases - quiescent, irregular contractions, and intense contractions - aiding in sweeping undigested materials. Step 3: This process helps maintain gut health and prevents issues like bacterial overgrowth or malabsorption. Summary: Choices A, C, and D are incorrect as they do not accurately describe the specific function of the migrating motor complex during fasting.