Correct Answer: C

Rationale: The correct answer is 'Decreased older client's ability to clear secretions.' Respiratory changes related to the normal aging process decrease an older adult's ability to clear secretions and protect the airway. In healthy older adults, the number of alveoli does not change significantly; their structure, however, is altered. Respiratory system compliance decreases with advancing age because of a progressive loss of elastic recoil of the lung parenchyma and conducting airways, and reduced elastic recoil of the lung and opposing forces of the chest wall. Production of surfactant in the lung does not usually decrease with aging, nor does it increase. However, the production of alveolar cells responsible for surfactant production is diminished. Choices A, B, and D are incorrect. Choice A is incorrect because respiratory system compliance decreases with aging. Choice B is incorrect as the number of alveoli does not significantly decrease in healthy older adults. Choice D is incorrect as the production of surfactant does not usually decrease with aging.

Correct Answer: D

Rationale: When educating an obese client about nutritional needs and weight loss, it is crucial to emphasize a holistic approach that involves understanding food and food products, fostering a positive mental attitude, and incorporating adequate exercise. Initiating a fast weight-loss diet is not advisable due to potential health risks and lack of long-term sustainability. Therefore, this option stands out as the exception and should not be part of the client's learning. Choices A, B, and C are essential components of a healthy weight-loss plan and should be included in the client's education.

Correct Answer: B

Rationale: Signs of physical readiness for toilet training include the child's ability to remove his or her own clothing. This ability indicates the child has developed the necessary fine motor skills to manage clothing during toilet training. The other choices are incorrect because temper tantrums, walking for a specific period, and using utensils are not indicators of physical readiness for toilet training.

Correct Answer: B

Rationale: The most appropriate toys for 2- and 3-year-old children in a day-care setting are blocks and push-pull toys. Toddlers enjoy objects of different textures like clay, sand, finger paints, and bubbles, as well as push-pull toys, large balls, and sand and water play. They also like activities such as blocks, painting, coloring with large crayons, large puzzles, and playing with trucks or dolls. Finger paints and card games may be more suitable for older children. Videos and cutting-and-pasting toys are generally more appropriate for preschoolers. Blocks and push-pull toys are beneficial for young children as they help in developing fine motor skills, hand-eye coordination, spatial awareness, and creativity. These toys also encourage imaginative play and problem-solving, making them ideal choices for toddlers.

Correct Answer: A

Rationale: The correct answer is 'A loss of melanin occurs in the normal aging process.' Graying hair in older adults is primarily due to a decrease in the number of melanocytes responsible for providing pigment and hair color. This reduction in melanin production leads to gray hair. The other choices are incorrect. While it is true that the skin becomes thinner with aging and the number of sweat glands and blood vessels decreases, these changes are not directly related to graying hair. Additionally, hereditary factors can influence when graying starts, but they do not cause the graying of hair itself.