Nursing Elites

1. Which of the following statements describes a chemical property of water?

• A. Water has a pH of 1.
• B. A water molecule contains 2 hydrogen atoms and 1 oxygen atom.
• C. A water molecule contains 2 oxygen atoms and 1 hydrogen atom.
• D. The chemical formula for water is HO.

Correct answer: B

Rationale: The correct answer is B because a water molecule consists of two hydrogen atoms and one oxygen atom, which is a fundamental chemical property of water. The pH of water is not a property of the water molecule itself but rather a measure of its acidity or alkalinity. Choice C is incorrect as it describes a different molecule, not water. Choice D provides an incorrect chemical formula for water, which is H2O.

2. The gland located on top of the kidneys responsible for regulating blood pressure and electrolyte balance is the:

• A. Thyroid gland
• B. Pituitary gland
• C. Adrenal gland
• D. Parathyroid gland

Correct answer: C

Rationale: The gland located on top of the kidneys responsible for regulating blood pressure and electrolyte balance is the adrenal gland. The adrenal gland produces hormones such as cortisol and aldosterone, which play a crucial role in regulating blood pressure and electrolyte balance in the body. The other choices, thyroid gland (choice A), pituitary gland (choice B), and parathyroid gland (choice D), do not have a primary role in regulating blood pressure and electrolyte balance. The thyroid gland is responsible for regulating metabolism, the pituitary gland controls various endocrine functions, and the parathyroid gland regulates calcium levels in the body.

3. What is the formula for calculating density?

• A. Density = Volume / Mass
• B. Density = Mass × Volume
• C. Density = Mass / Volume
• D. Density = Volume - Mass

Correct answer: A

Rationale: Density is defined as the amount of mass in a given volume. The formula for calculating density is Density = Mass / Volume. This means that you divide the mass of an object by its volume to determine its density. Therefore, the correct formula for calculating density is Density = Volume / Mass. Choice A is correct because density is calculated by dividing the volume by the mass. Choices B, C, and D are incorrect because they do not represent the correct relationship between mass and volume in calculating density.

4. How do efferent fibers exit the spinal cord?

• A. Through the anterior aspect
• B. Through the dorsal aspect
• C. Through the ventral aspect
• D. Through the lateral aspect

Correct answer: C

Rationale: Efferent fibers, which carry motor commands, exit the spinal cord through the ventral aspect, also known as the anterior aspect. The correct answer is C, 'Through the ventral aspect.' Efferent fibers exiting through the ventral aspect are responsible for carrying motor commands from the spinal cord to the muscles and glands. Choices A, B, and D are incorrect. Efferent fibers do not exit through the dorsal, lateral, or anterior aspects of the spinal cord.

5. Which of the following is responsible for carrying electrical impulses in the nervous system?

• A. Platelets
• B. Neurons
• C. Red blood cells
• D. White blood cells

Correct answer: B

Rationale: Neurons are the correct answer as they are specialized cells in the nervous system that transmit electrical impulses throughout the body. Neurons have structures like axons and dendrites that enable the transmission of electrical signals. Platelets are responsible for blood clotting, red blood cells carry oxygen, and white blood cells are part of the immune system; however, none of these cell types play a role in carrying electrical impulses in the nervous system.

Similar Questions