What is the function of goblet cells?
Regulate red blood cell production in the bone marrow
Secrete mucus to trap dust and particles in the nasal cavity
Produce antibodies to fight infections
Generate platelets for blood clotting
The Correct Answer is B
Rationale:
A. Regulate red blood cell production in the bone marrow is incorrect. Red blood cell production, or erythropoiesis, is controlled by erythropoietin, a hormone secreted primarily by the kidneys in response to low oxygen levels. Goblet cells have no role in this process. They are epithelial cells specialized for mucus secretion, not involved in hematopoiesis or the regulation of blood cell production.
B. Secrete mucus to trap dust and particles in the nasal cavity is correct. Goblet cells are unicellular glands located within the epithelial lining of the respiratory and gastrointestinal tracts. Their main function is to produce mucus, a sticky secretion that traps dust, microbes, and other particles, preventing them from reaching delicate tissues. In the respiratory system, mucus works together with cilia in a process called the mucociliary escalator, which moves trapped particles upward and out of the airways to maintain pulmonary health. Goblet cells also help moisturize mucosal surfaces, protecting them from drying and injury.
C. Produce antibodies to fight infections is incorrect. Antibodies are proteins produced by B lymphocytes and plasma cells as part of the adaptive immune system. Goblet cells do not have the machinery to produce immunoglobulins or participate in specific immune responses. While mucus does provide some nonspecific immune protection by trapping pathogens, it is not involved in antibody production.
D. Generate platelets for blood clotting is incorrect. Platelets are fragments of cytoplasm derived from megakaryocytes in the bone marrow and play a critical role in hemostasis. Goblet cells are unrelated to the clotting system and do not contribute to platelet formation or blood coagulation.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is D
Explanation
Rationale:
A. Thrombocytosis refers to an elevated platelet count, which can increase the risk of clot formation. It is unrelated to white blood cells and does not indicate infection or inflammation.
B. Neutropenia is a decreased number of neutrophils, a type of white blood cell, which can increase susceptibility to infections. This term represents a deficiency rather than an increase in white blood cells.
C. Anemia refers to a reduced number of red blood cells or decreased hemoglobin, leading to impaired oxygen delivery. It is unrelated to white blood cell counts or immune response.
D. Leukocytosis is defined as an increase in the total number of white blood cells (leukocytes), often in response to infection, inflammation, stress, or certain hematologic disorders. This increase is part of the body’s immune response, helping to fight pathogens and promote healing.
Correct Answer is C
Explanation
Rationale:
A. Deep partial-thickness burn involves the entire epidermis and most of the dermis, including deeper dermal structures such as hair follicles and sweat glands. These burns are typically red or white, moist or mottled, often very painful, and usually form blisters. Healing is slower and may require surgical intervention. Since the client’s burn shows no blisters and only involves part of the dermis superficially, this classification does not fit.
B. Electrical burn is caused by passage of electrical current through the body. It often produces internal tissue damage that may be more severe than the skin findings suggest. There is no indication in this scenario that electricity caused the injury, so this classification is inappropriate.
C. Superficial partial-thickness burn is correct. These burns involve the epidermis and the upper portion of the dermis. The skin appears red and painful, and blisters may or may not be present immediately after the injury. Superficial partial-thickness burns usually heal within 10–21 days without significant scarring. In this case, the burn resulted from hot water exposure, is red, painful, and shows no blisters, which aligns with a superficial partial-thickness burn.
D. Full-thickness burn involves all layers of the skin, including the epidermis, dermis, and sometimes underlying tissues such as fat, muscle, or bone. The affected area may appear white, brown, black, or leathery, and is often painless due to nerve destruction. Since the client’s burn is red, painful, and only partially involves the dermis, it does not qualify as full-thickness.
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