Nursing Elites

1. Which of the following is true about skeletal muscle?

• A. Skeletal muscle makes up 40% of the body's weight.
• B. Skeletal muscle attaches to bones by tendons.
• C. Muscle contraction is not involved in temperature regulation.
• D. Skeletal muscles contract only when in use.

Correct answer: B

Rationale: The correct statement is that skeletal muscle attaches to bones through tendons, enabling movement. Tendons connect muscles to bones and allow the force generated by muscle contraction to be transmitted to the bones, facilitating voluntary movements. Choice A is incorrect because skeletal muscle typically makes up around 40-50% of an individual's body weight, not a fixed 40%. Choice C is incorrect as muscle contraction plays a vital role in temperature regulation by generating heat. Choice D is incorrect as skeletal muscles may have constant low-level contractions even at rest, known as muscle tone.

2. What is the role of the gallbladder in digestion?

• A. To produce bile
• B. To store and concentrate bile
• C. To break down fats
• D. To secrete digestive enzymes

Correct answer: B

Rationale: The gallbladder's primary function in digestion is to store and concentrate bile produced by the liver. Bile is essential for the digestion and absorption of fats in the small intestine. While the gallbladder does not produce bile (Choice A) or secrete digestive enzymes (Choice D), it plays a crucial role in storing and releasing bile when needed. Therefore, the correct answer is B.

3. What is the primary function of the digestive system?

• A. To transport oxygen
• B. To break down food and absorb nutrients
• C. To produce hormones
• D. To transport blood

Correct answer: B

Rationale: The primary function of the digestive system is to break down food into smaller molecules and absorb nutrients such as vitamins, minerals, carbohydrates, proteins, and fats. These nutrients are then utilized by the body for energy, growth, and repair. The digestive system plays a crucial role in the process of extracting essential components from food and distributing them to the body's cells through the bloodstream. Choices A, C, and D are incorrect because transporting oxygen, producing hormones, and transporting blood are functions associated with other body systems like the respiratory system, endocrine system, and circulatory system, respectively, not the digestive system.

4. What is the primary function of the adrenal glands?

• A. To produce insulin
• B. To regulate metabolism and stress response
• C. To fight infections
• D. To regulate blood pressure

Correct answer: B

Rationale: The primary function of the adrenal glands is to regulate metabolism and the body's stress response. The adrenal glands produce hormones like cortisol and adrenaline that play a vital role in managing metabolism, immune response, and stress levels. Choice A is incorrect because insulin is produced by the pancreas, not the adrenal glands. Choice C is incorrect because fighting infections is primarily the role of the immune system. Choice D is incorrect as the regulation of blood pressure involves organs like the heart, kidneys, and blood vessels, not the adrenal glands.

5. What is the primary function of the liver in the digestive system?

• A. To produce bile
• B. To secrete digestive enzymes
• C. To store glucose
• D. To store bile

Correct answer: A

Rationale: The correct answer is A: 'To produce bile.' The liver's primary role in the digestive system is to produce bile. Bile is essential for emulsifying fats, aiding in their digestion and absorption in the small intestine. Choice B is incorrect because while the liver does secrete some digestive enzymes, its primary function is bile production. Choice C is incorrect because while the liver does store glucose, it is not its primary function in the digestive system. Choice D is incorrect because the liver produces bile, but it does not store it.

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