Nursing Elites

1. What is the coefficient of oxygen in the balanced chemical equation for the combustion of methane (CH4)?

• A. 1
• B. 2
• C. 3
• D. 4

Correct answer: b

Rationale: The balanced equation is CH4 + 2O2 → CO2 + 2H2O, so the coefficient of oxygen is 2.

2. What are enzymes?

• A. Building blocks of muscle
• B. Biological catalysts
• C. Energy source
• D. Antibodies

Correct answer: B

Rationale: Enzymes are proteins that speed up chemical reactions in our cells. They act like tiny factories, fitting specific molecules (substrates) into their active site to facilitate reactions.

3. The process of bone formation and breakdown is called:

• A. Ossification
• B. Resorption
• C. Remodeling
• D. All of the above

Correct answer: C

Rationale: The correct answer is C: 'Remodeling.' Bone remodeling is the continuous process of bone formation (ossification) and breakdown (resorption). Ossification refers to the formation of bone tissue, while resorption is the breakdown and removal of old bone tissue. The term 'remodeling' encompasses both of these processes, making it the most appropriate choice. While ossification and resorption are part of bone remodeling, they do not cover the entire process on their own, hence 'All of the above' is incorrect.

4. Which respiratory structure is responsible for vocalization and sound production?

• A. Trachea
• B. Larynx
• C. Bronchi
• D. Alveoli

Correct answer: B

Rationale: The correct answer is B: Larynx. The larynx, also known as the voice box, is the respiratory structure responsible for vocalization and sound production. It contains the vocal cords, which vibrate as air passes through, producing sound. The trachea (A) is the windpipe that carries air to and from the lungs. The bronchi (C) are the main airways that branch off from the trachea into the lungs. The alveoli (D) are tiny air sacs in the lungs where gas exchange occurs, but they are not directly involved in vocalization.

5. Muscle tissue is responsible for movement. Which type of muscle tissue is found in the heart?

• A. Skeletal muscle
• B. Smooth muscle
• C. Cardiac muscle
• D. All of the above

Correct answer: C

Rationale: The correct answer is C: Cardiac muscle. Cardiac muscle is a specialized type of muscle tissue found in the heart. Unlike skeletal muscle, which is under voluntary control, and smooth muscle, which is found in the walls of internal organs and blood vessels, cardiac muscle is involuntary and responsible for the rhythmic contractions of the heart to pump blood throughout the body. Therefore, cardiac muscle is the specific type of muscle tissue found in the heart, making it the correct choice for this question.

6. Which term describes the resistance of a substance to being hammered into different shapes?

• A. Viscosity
• B. Ductility
• C. Malleability
• D. Conductivity

Correct answer: c

Rationale: Malleability refers to the resistance of a substance to being hammered or pressed into different shapes without breaking.

Similar Questions