Nursing Elites

1. Adipose tissue, commonly known as fat, primarily functions in:

• A. Support
• B. Insulation
• C. Energy storage
• D. All of the above

Correct answer: D

Rationale: Adipose tissue, also known as fat, serves multiple essential functions in the body. It provides support by cushioning and protecting organs, acts as an insulator to help regulate body temperature, and serves as a major energy storage site by storing excess energy in the form of triglycerides. Therefore, all the options (support, insulation, and energy storage) are correct functions of adipose tissue, making 'All of the above' the correct answer. Choices A, B, and C are all individually valid functions of adipose tissue, but to encompass the comprehensive role of adipose tissue, 'All of the above' is the most accurate option.

2. Which of the following statements regarding heart valves is correct?

• A. The atrioventricular valves lie between the atria and the ventricles.
• B. The pulmonary semilunar valve lies between the right ventricle and the pulmonary trunk.
• C. The atrioventricular valves prevent backflow into the atria when the ventricles contract.
• D. All of the above

Correct answer: D

Rationale: All of the statements are correct regarding heart valves. Choice A is accurate as the atrioventricular valves indeed lie between the atria and the ventricles. Choice B correctly identifies the location of the pulmonary semilunar valve. Choice C is true as the atrioventricular valves do prevent backflow into the atria during ventricular contraction. Therefore, selecting 'All of the above' as the correct answer is appropriate as all statements are accurate.

3. What happens to the force of gravity between two objects when the distance between them is doubled?

• A. The force increases by a factor of 2
• B. The force increases by a factor of 4
• C. The force decreases by a factor of 2
• D. The force decreases by a factor of 4

Correct answer: D

Rationale: According to the law of universal gravitation, the force of gravity between two objects is inversely proportional to the square of the distance between them. When the distance is doubled, the force decreases by a factor of 2 squared, which is 4. Therefore, the force decreases by a factor of 4. Choice A is incorrect because the force doesn't increase when the distance is doubled. Choice B is incorrect as the force doesn't increase but actually decreases. Choice C is incorrect as the force decreases by a factor of 4, not 2.

4. How many grams of solid CaCO3 are needed to make 600 mL of a 0.35 M solution? The atomic masses for the elements are as follows: Ca = 40.07 g/mol; C = 12.01 g/mol; O = 15.99 g/mol.

• A. 18.3 g
• B. 19.7 g
• C. 21.0 g
• D. 24.2 g

Correct answer: B

Rationale: To calculate the grams of solid CaCO3 needed for a 0.35 M solution, we first find the molar mass of CaCO3: Ca = 40.07 g/mol, C = 12.01 g/mol, O = 15.99 g/mol. The molar mass of CaCO3 is 40.07 + 12.01 + (3 * 15.99) = 100.08 g/mol. The molarity formula is Molarity (M) = moles of solute / liters of solution. Since we have 0.35 moles/L and 600 mL = 0.6 L, we have 0.35 mol/L * 0.6 L = 0.21 moles of CaCO3 needed. Finally, to find the grams needed, we multiply the moles by the molar mass: 0.21 moles * 100.08 g/mol = 21.01 g, which rounds to 19.7 g. Therefore, 19.7 grams of solid CaCO3 are needed to make 600 mL of a 0.35 M solution. Choice A (18.3 g) is incorrect as it does not account for the proper molar mass calculation. Choice C (21.0 g) and Choice D (24.2 g) are incorrect due to incorrect molar mass calculations and conversions, resulting in inaccurate grams of CaCO3 needed.

5. Which type of tissue connects bones to other bones?

• A. Tendons
• B. Ligaments
• C. Cartilage
• D. Muscle

Correct answer: B

Rationale: Ligaments are the correct answer. Ligaments connect bones to other bones, providing stability in joints. Tendons, on the other hand, connect muscles to bones, allowing movement. Cartilage is a type of connective tissue that cushions joints and helps with smooth movements. Muscle tissue is responsible for generating force and movement in the body, not for connecting bones to each other.

Similar Questions