A nurse is teaching a class about teeth. Which of the following are functions of teeth? (Select all that apply)
Assist with speech.
Secrete mucus.
Shape the face.
Chew food.
Protect against pathogens.
Correct Answer : A,C,D
Choice A reason: Teeth facilitate speech by shaping the oral cavity for articulation. Incisors and molars help form sounds like “th” or “s” by directing airflow and tongue positioning. This involves coordination with the vocal cords and oropharyngeal muscles, critical for clear phonation and language expression.
Choice B reason: Teeth do not secrete mucus, which is produced by salivary glands and mucosal cells in the oral cavity. Mucus lubricates and protects oral tissues but is unrelated to tooth function. Teeth are hard structures (enamel, dentin) designed for mechanical tasks, not glandular secretion.
Choice C reason: Teeth contribute to facial structure by supporting the jaw and soft tissues. They maintain mandibular and maxillary alignment, influencing cheek and lip contours. Tooth loss alters facial aesthetics due to bone resorption, affecting the skeletal framework and overall facial shape, critical for appearance.
Choice D reason: Chewing (mastication) is a primary function of teeth, breaking down food via mechanical grinding. Molars and premolars crush food, increasing surface area for enzymatic digestion by salivary amylase. This process, coordinated by jaw muscles, initiates digestion, ensuring nutrient absorption in the gastrointestinal tract.
Choice E reason: Teeth do not directly protect against pathogens. Saliva and immune cells in the oral mucosa provide antimicrobial defense via lysozyme and immunoglobulins. Teeth are inert structures, and while they support oral health indirectly, they lack active immune functions to combat bacterial or viral pathogens.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
Choice A reason: In the exhaustion stage of general adaptation syndrome, prolonged stress depletes the body’s resources, impairing the hypothalamic-pituitary-adrenal axis. Chronic cortisol elevation disrupts neurotransmitter balance, particularly serotonin and dopamine, leading to depression. This psychological manifestation reflects the body’s inability to cope with sustained stress, making it a hallmark of the exhaustion phase.
Choice B reason: Blood glucose levels returning to normal is characteristic of the resistance stage, not exhaustion. In exhaustion, metabolic dysregulation persists due to depleted energy reserves, potentially causing hypoglycemia or erratic glucose levels. The body’s failure to maintain homeostasis makes this an incorrect manifestation for the exhaustion stage.
Choice C reason: Pupil dilation occurs in the alarm stage of general adaptation syndrome, driven by sympathetic activation and catecholamine release to prepare for “fight-or-flight.” In the exhaustion stage, the body’s resources are depleted, and such acute responses diminish, making pupil dilation an incorrect manifestation for this chronic stress phase.
Choice D reason: Blood pressure increases during the alarm and resistance stages due to sympathetic activation and vasoconstriction. In the exhaustion stage, the body’s regulatory systems fail, potentially leading to hypotension or cardiovascular collapse due to depleted reserves, making increased blood pressure an incorrect manifestation for this stage.
Correct Answer is B
Explanation
Choice A reason: Spirituality typically provides meaning and hope, not a desire to hasten death. It engages neural reward pathways, reducing despair. Hastening death may relate to psychological distress or euthanasia debates, but spiritual beliefs often promote acceptance and peace, not acceleration of death in terminal patients.
Choice B reason: Spirituality enhances quality of life by providing emotional support, meaning, and connection, activating the brain’s reward centers (e.g., dopamine release). It reduces stress via mindfulness or prayer, lowering cortisol and improving psychological resilience, helping end-of-life patients find peace and maintain emotional well-being.
Choice C reason: Spirituality generally counters hopelessness by fostering hope and purpose through beliefs or community support. Hopelessness stems from amygdala-driven despair, which spirituality mitigates by engaging prefrontal cortex functions like meaning-making, reducing negative emotional states in terminal illness, not increasing them.
Choice D reason: Depression involves low serotonin and dopamine, leading to low mood. Spirituality often alleviates depression by providing emotional support and purpose, enhancing prefrontal cortex activity and reducing amygdala-driven negative emotions. It fosters resilience, not increased depression, in end-of-life patients seeking meaning.
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