Nokea
What type of cells create exocrine secretions?
- A. alpha cells
- B. beta cells
- C. acinar cells
- D. plasma cells
Correct Answer: C
Rationale: Acinar cells are responsible for creating exocrine secretions, such as enzymes and digestive juices. Alpha cells are found in the pancreas and are responsible for producing glucagon, beta cells produce insulin, and plasma cells are a type of white blood cell involved in immune responses. Therefore, the correct answer is acinar cells, as they specifically produce exocrine secretions.
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During a stress test, a patient complains of severe chest pain. Which of the following medications is the most appropriate to relieve this discomfort?
- A. Aspirin
- B. Diazoxide
- C. Procardia
- D. Mannitol
Correct Answer: C
Rationale: In this scenario, the most appropriate medication to relieve severe ischemic chest pain during a stress test is Procardia. Procardia, a calcium channel blocker, is effective in quickly alleviating chest pain by dilating coronary arteries, improving blood flow to the heart muscle. Aspirin, although important for antiplatelet effects, is not the best choice for immediate relief of severe chest pain. Diazoxide is a vasodilator used in hypertensive emergencies, not for acute chest pain. Mannitol is an osmotic diuretic used to reduce intracranial pressure, not for chest pain relief.
What happens if folic acid is administered to treat anemia without determining its underlying cause?
- A. Erythropoiesis is inhibited
- B. Excessive levels of folic acid might accumulate, causing toxicity
- C. The symptoms of pernicious anemia might be masked, delaying treatment
- D. Intrinsic factor is destroyed
Correct Answer: C
Rationale: When folic acid is given without determining the underlying cause of anemia, the symptoms of pernicious anemia may be masked, potentially delaying the correct treatment. Folic acid alone does not protect against the central nervous system changes seen in pernicious anemia, which are related to Vitamin B12 deficiency. Folic acid and Vitamin B12 are both crucial for cell growth and division. Administering folic acid without knowing the specific type of anemia could lead to a delay in addressing the root cause. Option A is incorrect because folic acid is essential for erythropoiesis, the production of red blood cells. Option B is incorrect as excessive folic acid can cause toxicity, but it is not the primary concern in this context. Option D is incorrect because folic acid treatment for anemia does not directly impact intrinsic factor, which is related to Vitamin B12 absorption.
A client asks a nurse working in a dental office what type of drug the dentist uses to provide anesthesia during the extraction of the client's wisdom teeth. The dentist uses an anesthetic gas, also known as laughing gas. This agent is:
- A. nitrous oxide.
- B. nitrogen.
- C. nitric oxide.
- D. nitrogen dioxide.
Correct Answer: A
Rationale: The correct answer is nitrous oxide. Nitrous oxide is commonly known as laughing gas and is used as an anesthetic gas for procedures like dental extractions. It produces analgesia and mild euphoria without loss of consciousness. Nitrogen is a nonmetallic element found in air, while nitric oxide is a vasodilator produced from L-arginine. Nitrogen dioxide is a poisonous gas found in smog and exhaust fumes and is not used for anesthesia.
A nurse is teaching a client newly diagnosed with Emphysema about the disease process. Which of the following statements best explains the problems associated with emphysema and could be adapted for use in the nurse's discussion with the client?
- A. Hyperactivity of the medium-sized bronchi caused by an inflammatory response leads to wheezing and tightness in the chest.
- B. Larger than normal air spaces and loss of elastic recoil cause air to be trapped in the lung and collapse airways.
- C. Vasodilation, congestion, and mucosal edema cause a chronic cough and sputum production.
- D. Chloride is not being transported properly, producing excess absorption of water and sodium, and thick viscous mucus
Correct Answer: B
Rationale: The correct answer is: 'Larger than normal air spaces and loss of elastic recoil cause air to be trapped in the lung and collapse airways.' Emphysema is a breakdown of the elastin and fiber network of the alveoli where the alveoli enlarge or the walls are destroyed. This alveolar destruction leads to the formation of larger-than-normal air spaces. Emphysema is one of a group of pulmonary diseases of a chronic nature characterized by increased resistance to airflow; the entity is part of chronic obstructive pulmonary disease (COPD).
Choice A is incorrect because emphysema is not primarily characterized by hyperactivity of the medium-sized bronchi causing wheezing and tightness in the chest.
Choice C is incorrect because vasodilation, congestion, and mucosal edema are not the primary mechanisms involved in emphysema, and they do not directly lead to chronic cough and sputum production.
Choice D is incorrect because emphysema is not related to chloride transport issues and thick viscous mucus production.
A 64-year-old Alzheimer's patient has exhibited excessive cognitive decline resulting in harmful behaviors. The physician orders restraints to be placed on the patient. Which of the following is the appropriate procedure?
- A. Secure the restraints to the bed rails on all extremities.
- B. Notify the physician that restraints have been placed properly.
- C. Communicate with the patient and family the need for restraints.
- D. Position the head of the bed at a 45-degree angle.
Correct Answer: C
Rationale: In cases where restraints are considered necessary for a patient, it is crucial to communicate effectively with both the patient and their family about the reasons for this decision. This helps ensure that all parties involved understand the necessity of restraints and are informed about the potential risks and benefits. Option A, securing restraints to the bed rails on all extremities, is not appropriate as it does not involve proper communication or ethical considerations. Option B, notifying the physician that restraints have been placed properly, overlooks the importance of patient and family involvement in decision-making. Option D, positioning the head of the bed at a 45-degree angle, is unrelated to the use of restraints and does not address the situation at hand.