Nursing Elites

1. Which muscle causes a joint to bend?

• A. Cardiac
• B. Extension
• C. Flexor
• D. Smooth

Correct answer: C

Rationale: The correct answer is C: Flexor. A flexor muscle contracts to bend a joint, such as bending the elbow or knee. Flexor muscles are responsible for flexing or bending a joint, while extensor muscles are responsible for extending or straightening a joint. Choice A, Cardiac, is incorrect as cardiac muscle is found in the heart and is responsible for pumping blood. Choice B, Extension, is incorrect as extension refers to the straightening or extending movement of a joint, which is opposite to bending. Choice D, Smooth, is incorrect as smooth muscles are involuntary muscles found in organs like the intestines and blood vessels, not directly responsible for bending joints.

2. Which of the following pieces of writing should include citations?

• A. A comparison of the language used in two different Shakespeare plays
• B. A news article describing a burglary
• C. A description of your favorite play
• D. A personal essay about your lifelong interest in marine biology

Correct answer: A

Rationale: The correct answer is A. A comparison of the language used in two different Shakespeare plays should include citations to support the analysis. Citations are necessary in academic or analytical pieces to give credit to the original sources, especially when comparing specific works. Choices B, C, and D do not require citations as they are more subjective or personal in nature. Choice B, a news article, should be based on facts and not personal analysis. Choice C is a personal opinion, and choice D is a personal essay based on the author's experiences and interests, where citations are not typically needed.

3. Which protein complex in the sarcomere is responsible for the thick filament?

• A. Actin
• B. Myosin
• C. Tropomyosin
• D. Troponin

Correct answer: B

Rationale: Myosin is the protein complex responsible for the thick filament in the sarcomere. It interacts with actin, another protein in the sarcomere, to generate the sliding movement that results in muscle contraction. Actin is a thin filament protein that interacts with myosin to create the sliding filament mechanism. Tropomyosin and troponin are regulatory proteins that regulate muscle contraction by controlling the interaction between actin and myosin, rather than directly being responsible for the thick filament.

4. What is the purpose of sodium bicarbonate when released into the lumen of the small intestine?

• A. It works to chemically digest fats in the chyme.
• B. It decreases the pH of the chyme to prevent harm to the intestine.
• C. It works to chemically digest proteins in the chyme.
• D. It increases the pH of the chyme to prevent harm to the intestine.

Correct answer: D

Rationale: Sodium bicarbonate, when released into the lumen of the small intestine, functions to increase the pH of the acidic chyme coming from the stomach. This increase in pH helps neutralize the acidity of the chyme, creating a more optimal environment for the digestive enzymes in the small intestine to function properly. Maintaining a slightly basic pH in the small intestine is crucial for overall digestion and absorption of nutrients. Choices A, B, and C are incorrect. Sodium bicarbonate does not chemically digest fats or proteins in the chyme, and it does not decrease the pH of the chyme as it actually increases the pH to prevent harm to the intestine.

5. Which of the following sentences demonstrates the correct use of an apostrophe?

• A. Lyle works for the courthouse, and among his responsibilities is getting the jurors meal’s.
• B. Lyle works for the courthouse, and among his responsibilities is getting the juror’s meals.
• C. Lyle works for the courthouse, and among his responsibilities is getting the jurors’ meals.
• D. Lyle works for the courthouse, and among his responsibilities is getting the jurors meals’.

Correct answer: C

Rationale: The apostrophe is correctly placed in this sentence to show possession by multiple jurors.

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