Which of the following best describes the primary source of energy for Earth's climate system?

Solar radiation

Geothermal heat

Tidal forces

Human activities

Answer and Explanation

The Correct Answer is A

Choice A reason: Solar radiation delivers approximately 99.97% of Earth's climate system energy. The sun emits electromagnetic waves, primarily in visible and infrared spectra, absorbed by Earth's surface and atmosphere. This energy fuels atmospheric circulation, ocean currents, and the hydrological cycle, establishing temperature gradients that drive global weather and climate patterns. Sunspot cycles cause minor variations but affirm solar dominance.

Choice B reason: Geothermal heat, from radioactive decay in Earth's core and mantle plus residual formation heat, contributes only about 0.025% to the climate energy budget. It powers volcanic activity and tectonic processes, with localized effects like geothermal springs, but its role in atmospheric or oceanic circulation is negligible compared to solar radiation’s extensive influence.

Choice C reason: Tidal forces, driven by gravitational interactions between Earth, the moon, and the sun, produce oceanic tides, contributing less than 0.001% to the climate system’s energy. Tides influence coastal mixing but lack the magnitude to drive atmospheric circulation or global climate, making them insignificant compared to solar radiation’s vast energy input.

Choice D reason: Human activities, such as fossil fuel burning and deforestation, release greenhouse gases, altering climate by trapping solar heat. These are secondary effects, not primary energy sources, with negligible direct energy contribution. They modify solar radiation absorption, acting as feedback mechanisms, not independent drivers like the sun’s direct energy.

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Correct Answer is A

Explanation

Choice A reason: Topical corticosteroids reduce inflammation, scaling, and itching in psoriasis by inhibiting pro-inflammatory cytokines and immune responses in affected skin. They are first-line for plaque psoriasis with silvery scales, effectively managing burning and promoting healing of inflamed, bleeding areas on elbows and palms.

Choice B reason: Topical analgesics relieve pain but do not address psoriasis’s underlying inflammation or scaling. Psoriatic plaques are primarily inflammatory, not neuropathic. Analgesics may reduce burning temporarily but lack the anti-inflammatory action of corticosteroids, making them ineffective for managing chronic psoriatic lesions.

Choice C reason: Topical antibiotics treat bacterial infections, not psoriasis, which is an autoimmune inflammatory condition. Bleeding in psoriasis results from skin fragility, not infection. Antibiotics are unnecessary unless secondary infection is confirmed, making them inappropriate compared to corticosteroids, which target the disease’s inflammatory pathology.

Choice D reason: Colloidal oatmeal-based lotion soothes irritated skin and reduces itching but lacks anti-inflammatory properties to treat psoriasis’s scaling and inflammation. It may provide symptomatic relief but is inadequate for managing chronic plaques, unlike corticosteroids, which directly address the autoimmune-driven inflammation and scaling.

A. Difficulty with urination B. Recent oral intake C. Trouble sleeping D. Unexplained weight loss

Correct Answer is B

Explanation

Choice A reason: Difficulty with urination is not a primary concern for pyridostigmine, a cholinesterase inhibitor used in myasthenia gravis to enhance neuromuscular transmission. While cholinergic side effects may include urinary urgency, this is not a pre-administration priority compared to oral intake, which affects absorption and efficacy.

Choice B reason: Recent oral intake is critical before administering pyridostigmine, as food can delay its absorption, reducing effectiveness in myasthenia gravis. Taking it 30–60 minutes before or 2 hours after meals ensures optimal plasma levels, improving muscle strength, making this the priority information to obtain.

Choice C reason: Trouble sleeping is not directly relevant to pyridostigmine administration. While cholinergic side effects like diarrhea may disrupt sleep, this is a secondary concern. Ensuring proper timing with oral intake is critical for therapeutic efficacy, as absorption impacts symptom control in myasthenia gravis.

Choice D reason: Unexplained weight loss may indicate myasthenia gravis progression or other issues but is not a pre-administration concern for pyridostigmine. Timing with oral intake directly affects the drug’s pharmacokinetics, ensuring effective muscle strength improvement, making weight loss less urgent to assess before dosing.

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Which of the following best describes the primary source of energy for Earth's climate system?

Nursing Test Bank

Naxlex Comprehensive Predictor Exams

A client with psoriasis returns to the clinic reporting the persistence of several silvery, scaly areas on the elbows and palms that frequently burn and sometimes bleed. Which prescription should the nurse teach the client to use for the skin condition?

Correct Answer is A

Explanation

A client with myasthenia gravis receives a new prescription for pyridostigmine. Which information should the nurse obtain prior to administering the medication?

Correct Answer is B

Explanation

The nurse is caring for a client with a history of breast cancer who is receiving chemotherapy. Which side effect should the nurse monitor for?

The nurse is reviewing risk factors for cholelithiasis in a client’s history. Which factor most significantly increases the client’s risk for developing gallstones?

A client with chronic obstructive pulmonary disease receives a new prescription for an ipratropium inhaler. Which action indicates to the nurse that additional teaching is needed?

Which of the following best describes the primary source of energy for Earth's climate system?

The nurse is caring for a client with a new diagnosis of asthma. Which teaching point should the nurse emphasize for proper inhaler use?

The nurse is caring for a client with a suspected pulmonary embolism. Which diagnostic test should the nurse anticipate?