Nokea
Is the loss of teeth or supporting periodontium often associated with poor food selection and limited chewing ability, and do the patients' masticatory efficiency and biting force decline with each tooth lost?
- A. Both statements are true
- B. Both statements are false
- C. The first statement is true; the second is false
- D. The first statement is false; the second is true
Correct Answer: A
Rationale: Both statements are indeed true. The loss of teeth or supporting periodontium frequently leads to poor food selection and limited chewing ability, as these conditions can make certain foods difficult to consume. Additionally, a patient's masticatory efficiency and biting force do decline with each tooth lost, as there are fewer teeth to distribute the force of the bite. Choices B, C, and D are incorrect because they suggest that one or both of these statements are false, which is not the case.
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In a patient with liver cirrhosis, weight gain due to fluid retention can mask the symptoms of what condition?
- A. Liver failure
- B. Gallbladder disease
- C. Heart failure
- D. Protein-Energy Malnutrition (PEM)
Correct Answer: D
Rationale: In a patient with liver cirrhosis, weight gain due to fluid retention can mask Protein-Energy Malnutrition (PEM) symptoms. This can lead to an increase in weight, making it challenging to identify weight loss or muscle wasting associated with PEM. Therefore, option D is correct. Options A, B, and C are incorrect because fluid retention and weight gain related to liver cirrhosis do not necessarily hide the symptoms of liver failure, gallbladder disease, or heart failure.
By the age of three, which age-appropriate food skill can a child typically perform?
- A. Using utensils and a napkin
- B. Spearing food with a fork
- C. Measuring liquids
- D. Displaying proper table manners
Correct Answer: B
Rationale: By the age of three, a child typically develops the motor skills needed to spear food with a fork. This is a critical milestone in self-feeding as it shows progress in fine motor coordination. Choice 'A' is incorrect because using utensils and a napkin properly is a skill that may take longer to develop and refine. Choice 'C' is not correct as measuring liquids requires a higher level of motor skills and understanding of quantities that a three-year-old child might not possess. Choice 'D' is also incorrect as the proper display of table manners is a complex skill that is typically learned over a longer period and involves social and cultural norms.
What should be recommended to help prevent early childhood caries (ECC) in infants?
- A. Avoid giving the infant nighttime bottles
- B. Have the infant drink pasteurized skim milk
- C. Feed the infant iron-rich foods
- D. Give the infant fruit juice to drink
Correct Answer: A
Rationale: The correct answer is 'A: Avoid giving the infant nighttime bottles' because prolonged exposure to sugars in milk during the night can lead to caries. Options 'B: Have the infant drink pasteurized skim milk' and 'D: Give the infant fruit juice to drink' are not recommended as they contain sugars that can cause cavities, especially in infants. Option 'C: Feed the infant iron-rich foods' is incorrect because while a balanced diet is important, iron-rich foods do not directly prevent caries development.
Intrinsic factor from the stomach is needed for the absorption of which vitamin?
- A. vitamin B12
- B. folate
- C. niacin
- D. vitamin B6
Correct Answer: A
Rationale: The correct answer is A: vitamin B12. Intrinsic factor is a glycoprotein produced by the stomach that is necessary for the absorption of vitamin B12 in the small intestine. Vitamin B12 binds to intrinsic factor in the stomach, forming a complex that is then absorbed in the ileum. This absorption process is crucial for preventing vitamin B12 deficiency. Choices B, C, and D are incorrect because they do not require intrinsic factor for absorption. Folate is absorbed in the small intestine through a different mechanism, niacin can be absorbed in the small intestine without the need for intrinsic factor, and vitamin B6 does not rely on intrinsic factor for absorption.
Can bacterial plaque metabolize sucrose, lactose, and fructose? Is fructose, also known as levulose and found naturally in honey, less cariogenic than sucrose and lactose?
- A. Yes, bacterial plaque can metabolize these sugars, but no, fructose is not less cariogenic.
- B. No, bacterial plaque cannot metabolize these sugars, and fructose is not less cariogenic.
- C. Yes, bacterial plaque can metabolize these sugars, but no, fructose is not less cariogenic.
- D. No, bacterial plaque cannot metabolize these sugars, but yes, fructose is less cariogenic.
Correct Answer: A
Rationale: The first statement is correct as bacterial plaque can indeed metabolize sucrose, lactose, and fructose. However, the second statement is inaccurate. Fructose, despite being found naturally in honey and known also as levulose, is not less cariogenic than either sucrose or lactose. This means that its consumption does not result in fewer cavities or tooth decay. Therefore, the correct answer is that bacterial plaque can metabolize these sugars, but fructose is not less cariogenic. Choices B, C, and D are incorrect because they either wrongly assert that bacterial plaque cannot metabolize these sugars or wrongly claim that fructose is less cariogenic.