A nurse is studying the differences between normal cells and benign tumor cells. What information is included in this?

Benign tumors have lost their cellular regulation from contact inhibition.

Benign tumors typically grow in the wrong place or at the wrong time.

Benign tumors grow through invasion of other tissue.

The loss of characteristics of the parent cells is referred to as anaplasia.

Answer and Explanation

The Correct Answer is B

Choice B rationale:
Benign tumors typically grow in the wrong place or at the wrong time. This is a key distinguishing feature of benign tumors compared to normal cells. Normal cells have precise mechanisms that control their growth, ensuring they divide and multiply only when and where they are needed. Benign tumors, however, have disruptions in these regulatory mechanisms, leading to abnormal growth patterns. This means they may grow in locations where they don't belong or continue to grow even when they are no longer needed.
Here's a detailed explanation of why the other choices are incorrect:
Choice A:
Benign tumors have not lost their cellular regulation from contact inhibition. Contact inhibition is a process that stops normal cells from growing when they come into contact with other cells. Benign tumors still maintain this ability, which helps to limit their growth and prevent them from spreading to other tissues.
Choice C:
Benign tumors do not grow through invasion of other tissue. Invasion is a hallmark feature of malignant tumors (cancers). Benign tumors, on the other hand, typically grow as encapsulated masses, meaning they are surrounded by a well-defined border that separates them from surrounding tissues. They do not infiltrate or invade surrounding structures.
Choice D:
Anaplasia refers to the loss of differentiation and resemblance to the parent cells, which is a characteristic of malignant tumors, not benign tumors. Benign tumors still maintain a degree of differentiation, meaning they retain some of the characteristics of the normal cells from which they originated.

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Correct Answer is A

Explanation

Choice A rationale:
Hyperventilation is a condition characterized by rapid and deep breathing, leading to excessive removal of carbon dioxide (CO2) from the body. This decrease in CO2 levels actually causes respiratory alkalosis, not respiratory acidosis.
CO2 is a weak acid, and its removal from the blood raises the blood pH, making it more alkaline. Key mechanisms involved in hyperventilation-induced respiratory alkalosis:
Increased alveolar ventilation: Hyperventilation increases the rate at which CO2 is expelled from the lungs, reducing its concentration in the blood.
Shift in the equilibrium of the carbonic acid-bicarbonate buffer system: The reduction in CO2 levels drives the equilibrium towards the formation of bicarbonate ions, further reducing the concentration of hydrogen ions and increasing pH.
Renal compensation: The kidneys respond to respiratory alkalosis by excreting more bicarbonate ions, which helps to normalize the blood pH.
Choice B rationale:
Asthma is a chronic respiratory disease characterized by inflammation and narrowing of the airways. This can lead to impaired ventilation and retention of CO2, which can contribute to respiratory acidosis.
Mechanisms by which asthma can cause respiratory acidosis:
Bronchoconstriction: Narrowed airways impede airflow, making it difficult to expel CO2 from the lungs.
Air trapping: Inflammation and mucus production can lead to air becoming trapped in the lungs, further increasing CO2 levels.
Hypoventilation: Severe asthma attacks can cause respiratory muscle fatigue, leading to a decrease in breathing rate and inadequate CO2 removal.
Choice C rationale:
Chronic obstructive pulmonary disease (COPD) is a group of lung diseases characterized by chronic obstruction of airflow. This obstruction can lead to impaired ventilation and retention of CO2, which can contribute to respiratory acidosis.
Mechanisms by which COPD can cause respiratory acidosis:
Emphysema: Destruction of lung tissue reduces the surface area available for gas exchange, making it difficult to expel CO2. Chronic bronchitis: Inflammation and mucus production in the airways can obstruct airflow and trap CO2 in the lungs.
Hypoventilation: COPD can lead to respiratory muscle fatigue and a decrease in breathing rate, further impairing CO2 removal.
Choice D rationale:
Pulmonary embolism (PE) is a blockage of an artery in the lungs, usually by a blood clot. This can lead to impaired gas exchange and a decrease in oxygen levels in the blood. In severe cases, PE can also cause respiratory acidosis due to inadequate CO2 removal.
Mechanisms by which PE can cause respiratory acidosis:
Ventilation-perfusion mismatch: PE obstructs blood flow to a portion of the lungs, reducing the amount of CO2 that can be removed from those areas.
Hypoxemia: Low oxygen levels in the blood can stimulate the respiratory drive, leading to hyperventilation and CO2 retention.
Right heart failure: PE can strain the right side of the heart, leading to decreased pulmonary blood flow and impaired CO2 removal.

A. Massage the site with scented oils B. Apply warm compresses to the site C. Administer topical lidocaine to the site D. Administer prescribed oral pain medication

Correct Answer is B

Explanation

Choice A rationale:
Massaging the site with scented oils is not recommended for pain relief after removal of a peripheral vascular access device. There is no evidence to support the effectiveness of scented oils in this context.
Additionally, some scented oils can be irritating to the skin, which could potentially worsen the pain, redness, and swelling.
It's crucial to use products that are specifically designed for wound care and pain management, and to follow the healthcare provider's instructions.
Choice B rationale:
Applying warm compresses to the site is an effective and recommended intervention to alleviate pain, redness, and swelling after removal of a peripheral vascular access device.
Warm compresses have the following beneficial effects:
Vasodilation: They promote blood flow to the area, which helps to reduce inflammation and pain. Muscle relaxation: The warmth helps to relax tense muscles, further easing discomfort.
Pain relief: Warmth can directly inhibit pain signals, providing a soothing sensation.
Increased circulation: Improved blood flow can help to remove inflammatory substances and promote healing. It's important to use a clean, warm compress and to apply it for 15-20 minutes at a time, several times a day.
Choice C rationale:
Topical lidocaine is a local anesthetic that can temporarily numb the skin.
While it can be used for pain relief, it's not typically the first-line intervention for pain associated with removal of a peripheral vascular access device.
Warm compresses are often preferred as they provide a more natural and non-invasive approach to pain management.
Choice D rationale:
Oral pain medication may be necessary if warm compresses do not provide adequate pain relief.
However, it's important to follow the healthcare provider's instructions regarding the type and dosage of pain medication to use.
Over-the-counter pain relievers, such as acetaminophen or ibuprofen, may be sufficient in some cases. Stronger prescription pain medication may be needed for more severe pain.

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A nurse is studying the differences between normal cells and benign tumor cells. What information is included in this?

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Naxlex Comprehensive Predictor Exams

Which of the following is not a cause of respiratory acidosis?

Correct Answer is A

Explanation

A nurse is attending to a client with a peripheral vascular access device who is experiencing pain, redness, and swelling at the site. What action should the nurse take to alleviate the pain after removing the device?

Correct Answer is B

Explanation

A nurse is caring for an older patient admitted with mild dehydration. What advice should the nurse give to best address this issue?

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