The parents of a 3-year-old child with congenital heart disease are afraid to let their child play with other children because of possible overexertion. The nurse’s reply should include which of the following?

Correct Answer: B

Rationale: The correct answer is B because it emphasizes the importance of social development and play for the child's overall well-being. Playing with peers helps the child develop social skills, emotional regulation, and physical abilities. It also promotes a sense of belonging and normalcy. The other choices are incorrect because: - A: Parents meeting all the child's needs may lead to overprotection and hinder the child's independence. - C: Constant parental supervision may limit the child's autonomy and hinder their social interactions. - D: Telling the child that peers' activities are too strenuous may create unnecessary fear and isolation.

Correct Answer: C

Rationale: The correct answer is C: neutrophil. Neutrophils are the most abundant type of leukocyte in human peripheral blood, constituting about 40-60% of total leukocytes. They are key players in the innate immune system, involved in phagocytosis and killing of pathogens. Eosinophils (A) and basophils (B) are less abundant than neutrophils. Monocytes (D) are also important in immune responses but are present in lower numbers than neutrophils in peripheral blood.

Correct Answer: C

Rationale: The correct answer is C: New influenza variants able to escape prior immunity regularly. This is because influenza viruses have high mutation rates, leading to the emergence of new strains that can evade previously acquired immunity. This phenomenon is known as antigenic drift, making it challenging for the immune system to recognize and respond effectively to the constantly evolving strains. A: Effective immunological memory fails to develop - This is incorrect as the immune system does develop memory cells upon exposure to influenza, but the issue lies in the ability of these memory cells to recognize and combat the rapidly changing strains. B: Immune responses to influenza involve innate immune mechanisms only - This is incorrect as both innate and adaptive immune responses are involved in fighting influenza, with adaptive immunity playing a crucial role in generating specific memory cells. D: Influenza virus targets memory cells - This is incorrect as influenza primarily targets respiratory epithelial cells rather than specifically targeting memory cells.

Correct Answer: C

Rationale: Step 1: Hematocrit measures the percentage of red blood cells in the blood sample. Step 2: Low hematocrit level indicates a decrease in the number of red blood cells (erythrocytes). Step 3: Red blood cells are responsible for transporting oxygen in the body. Step 4: Lack of enough erythrocytes leads to anemia and decreased oxygen-carrying capacity. Step 5: Therefore, the correct answer is C: erythrocytes. Summary: A: Albumin is a protein in the blood, not directly related to hematocrit levels. B: Procoagulants help in blood clotting, not directly related to hematocrit levels. D: Agglutination refers to the clumping of cells, not directly related to hematocrit levels.

Correct Answer: C

Rationale: The correct answer is C: Asplenia. Asplenia is a condition where an individual lacks a spleen or has a non-functioning spleen. The spleen plays a crucial role in filtering blood and can lead to hematological concerns if absent. Sickle cell anemia (A), hemophilia (B), and thalassemia (D) are all hereditary disorders that directly affect blood composition or clotting factors, making them relevant to hematological concerns. However, asplenia does not directly involve blood disorders but rather impairs the immune system's ability to fight infections due to the spleen's role in immune response.