Ameliaforster542

What is a hydrogen bond? a) Strong bond between two nonpolar molecules b) Ionic attraction between metal atoms c) Weak attraction between a positive end of one polar molecule and the negative end of another d) Covalent bond involving shared electrons Rationale: Hydrogen bonds are weak attractions between polar molecules like water. Ionic and covalent bonds involve stronger electron interactions and are not the same as hydrogen bonds. What is an ion? a) Neutral atom with...

In emphysema, what happens to the alveoli? a. Membranes form within alveoli, increasing surface area b. Cells in the bronchial lining divide too fast c. Pressure in alveoli increases and their walls burst, coalescing them and decreasing the surface area for gas exchange d. Tar from cigarettes blackens alveoli Rationale: Emphysema involves destruction of alveolar walls due to high pressure, reducing surface area. Other choices describe unrelated or incorrect mechanisms. An ...

Protein synthesis involves the following main process: a. tRNA molecules produce mRNA from ribosomes b. tRNA molecules bring amino acids to mRNA on the ribosome, and the amino acids join to form a polypeptide that folds c. DNA forms amino acids directly in the nucleus d. RNA destroys proteins and rebuilds them Rationale: Protein synthesis occurs when tRNA brings amino acids to the ribosome where they align with mRNA codons to form a protein chain. DNA does not directly produce amino ...

Which of the following does not occur with aging of the urinary system? a) decreased GFR b) renal tubules become encased in fat c) nephrons invert d) fibrous connective tissue accumulates around the kidney capsule Rationale: Nephrons do not “invert” with age. Decreased GFR, fat deposits, and fibrous tissue accumulation are normal aging changes in the kidneys. The thirst center in the hypothalamus is stimulated by _______ and inhibited by _______. a) an increase in the osm...

A patient with ITP is being treated with corticosteroids. What is the primary reason for this treatment? a) Increase platelet production in bone marrow b) Reduce immune-mediated platelet destruction c) Stimulate spleen activity d) Promote fibrin clot formation Rationale: Corticosteroids suppress the immune system and reduce destruction of platelets by macrophages in the spleen. They do not increase bone marrow production or help clot formation directly. Which finding is mo...

When a parent company acquires a subsidiary, which method of pre-acquisition income recognition is used under the equity method? A. Recognize income only when dividends are declared B. Recognize only cash flows from the subsidiary C. Recognize the parent’s share of subsidiary net income as it is earned D. Do not recognize any income until consolidation E. Recognize income only at year-end Rationale: Under the equity method, the parent recognizes its share of the subsidiary...

A patient is seen by an APRN at a primary clinic for follow-up regarding abnormal results of peripheral nervous system testing. Which diagnosis should the APRN suspect? A) Multiple sclerosis B) Stroke C) Demyelinating polyneuropathy D) Myasthenia gravis Rationale: Demyelinating polyneuropathy, such as Guillain-Barré syndrome, affects peripheral nerves and causes weakness and sensory changes. Multiple sclerosis primarily affects the central nervous system, stroke is an acute CNS even...

One of the problems with Texas government is that there are no regional councils that promote coordinated planning across local governments. A. True B. False C. Sometimes D. Only in large cities Rationale: Texas does have regional councils that coordinate planning, so the correct answer is False. What is the composition of the county commissioner's court? A. County judge only B. A county judge who is elected countywide and presides over the meetings, and four county comm...

In South Carolina, how much notice must an insurer give when cancelling a dwelling policy for non-payment of premiums? A. 5 days B. 15 days C. 10 days D. 30 days Rationale: State law requires a 10-day notice for non-payment cancellations to give the insured a chance to pay. Other options are either too short or too long. In order to be considered "fully insured" at 80% or more, Richard must carry at least $240,000 in insurance coverage on his home. What is the value of Ri...

A 55-year-old patient presents with left lower quadrant abdominal pain and fever. According to the ACR Appropriateness Criteria®, which imaging study is most appropriate? A. Ultrasound abdomen only B. Plain X-ray abdomen C. CT abdomen and pelvis with IV contrast D. MRI without contrast Rationale: CT with IV contrast provides detailed visualization of abdominal organs, abscesses, and inflammation. Ultrasound or plain X-ray may miss key findings, and MRI without contrast may be les...