What is one normal age-related change in the gastrointestinal system?

Correct Answer: B

Rationale: The correct answer is B: Difficulty chewing and swallowing. As people age, muscle strength and coordination in the mouth and throat may decline, leading to challenges in chewing and swallowing. This can result in issues such as choking and aspiration. This change is a normal part of aging due to weakening muscles. Choices A, C, and D are incorrect as they do not directly relate to age-related changes in the gastrointestinal system. Taste sensitivity may decrease with age, saliva production can decrease, and the movement of waste through the intestines may slow down rather than speed up.

Correct Answer: B

Rationale: The correct answer is B: Increasing iron intake. Iron is essential for the production of hemoglobin, which carries oxygen in red blood cells. Anemia is often due to an iron deficiency, so increasing iron intake helps replenish iron stores and improve red blood cell production. Reducing vitamin intake (A) is not recommended as vitamins play a crucial role in overall health. Injections of vitamin K (C) are not typically used to treat anemia. Decreasing fiber in the diet (D) is unrelated to anemia and can even worsen the condition by limiting nutrient absorption.

Correct Answer: B

Rationale: The correct answer is B: Pad the edge of the cast to reduce sharp edges. This is important to prevent skin irritation and injury from the rough edges of the cast. By padding the edges, it helps to distribute pressure evenly and decrease the risk of abrasions. Choice A is incorrect because using a sharp scratcher inside the cast can lead to skin damage and infections. Choice C is incorrect as keeping the cast damp or wet can cause skin maceration and increase the risk of infection. Choice D is incorrect as keeping the extremity low close to the ground can lead to swelling and discomfort.

Correct Answer: C

Rationale: The correct answer is C: Hyperthyroidism. Hyperthyroidism is when the thyroid gland produces an excess of thyroid hormone, leading to symptoms like weight loss, rapid heartbeat, and anxiety. Hypothyroidism (A) is the opposite, where the thyroid gland produces too little hormone. Hypertension (B) is high blood pressure and is not directly related to thyroid function. Hypothermia (D) is a condition of abnormally low body temperature and is not caused by thyroid hormone imbalance. In this case, the symptoms described align with hyperthyroidism, making it the correct answer.

Correct Answer: B

Rationale: The correct answer is B: Return fluid to the circulatory system. The lymphatic system helps maintain fluid balance by collecting excess fluid from tissues and returning it to the bloodstream. This process, known as lymphatic drainage, helps prevent swelling and maintains proper circulation. Choices A, C, and D are incorrect as the immune and lymphatic systems do not primarily function to provide reflex centers for respiration, protect internal organs, or absorb nutrients.