Nursing Elites

1. What happens to the density of a gas when its temperature increases at constant pressure?

• A. It increases.
• B. It decreases.
• C. It remains the same.
• D. Information insufficient

Correct answer: B

Rationale: As gas particles gain thermal energy with increasing temperature, they spread out, decreasing the density.

2. Which molecule is responsible for storing and providing a quick source of energy during short bursts of intense physical activity, such as weightlifting or sprinting?

• A. ATP (Adenosine Triphosphate)
• B. Glucose
• C. Myoglobin
• D. Lactic Acid

Correct answer: a

Rationale: The correct answer is A: ATP (Adenosine Triphosphate). ATP is known as the energy currency of the cell and is responsible for storing and providing quick energy during short bursts of intense physical activity. When muscles require immediate energy for activities like weightlifting or sprinting, ATP is broken down to release energy rapidly. Glucose is a source of energy but needs to be converted into ATP before it can be used by the muscles. Myoglobin is a protein that stores oxygen in muscle cells, not energy. Lactic Acid is produced during intense exercise but is not a direct source of quick energy like ATP.

3. Which type of waves do not require a medium for propagation?

• A. Transverse waves
• B. Longitudinal waves
• C. Electromagnetic waves
• D. Surface waves

Correct answer: c

Rationale: Electromagnetic waves (such as light or radio waves) can travel through a vacuum as they do not require a medium.

4. What happens to the wavelength of a wave when its frequency increases while the speed remains constant?

• A. Wavelength increases
• B. Wavelength decreases
• C. Wavelength remains the same
• D. Wavelength becomes zero

Correct answer: b

Rationale: When the frequency of a wave increases while the speed remains constant, the wavelength decreases.

5. The energy absorbed during a chemical reaction is called:

• A. Kinetic energy
• B. Potential energy
• C. Heat energy
• D. Endothermic energy

Correct answer: D

Rationale: Endothermic means "inward heat," indicating energy is absorbed during the reaction.

6. Which condition involves an overactive immune system attacking healthy tissues, leading to inflammation and damage?

• A. Immunodeficiency
• B. Autoimmune disease
• C. Allergy
• D. Cancer

Correct answer: B

Rationale: The correct answer is B: Autoimmune disease. Autoimmune diseases occur when the immune system mistakenly attacks healthy cells and tissues in the body, leading to inflammation and damage. Immunodeficiency (option A) is the opposite, where the immune system is weakened or not functioning properly. Allergies (option C) involve the immune system overreacting to harmless substances. Cancer (option D) is characterized by uncontrolled cell growth, not by the immune system attacking healthy tissues.

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