Nursing Elites

1. What property of a substance refers to its ability to undergo a chemical change and form new substances?

• A. Density
• B. Mass
• C. Reactivity
• D. Volume

Correct answer: c

Rationale: Reactivity refers to a substance's ability to undergo a chemical change or reaction, forming new substances with different properties.

2. When light reflects from a surface, what determines the angle of reflection?

• A. The material of the surface
• B. The wavelength of the light
• C. The angle of incidence
• D. The intensity of the light

Correct answer: C

Rationale: The angle of reflection is always equal to the angle of incidence according to the law of reflection, regardless of the material, wavelength, or intensity.

3. Which of the following is the smallest unit of matter?

• A. Molecule
• B. Atom
• C. Compound
• D. Element

Correct answer: B

Rationale: An atom is the fundamental building block of matter, while molecules are formed by the combination of atoms.

4. The spleen, a large lymphatic organ, is located in the:

• A. Chest
• B. Abdomen
• C. Pelvis
• D. Head and neck

Correct answer: B

Rationale: The correct answer is B: Abdomen. The spleen, a large lymphatic organ, is located in the upper left part of the abdomen, under the ribcage and above the stomach. It plays a crucial role in filtering and purifying the blood, removing old or damaged blood cells, and storing blood. The spleen is not located in the chest, pelvis, or head and neck. Understanding the anatomical location of organs is essential for medical professionals to accurately diagnose and treat patients.

5. The basic unit of communication in the nervous system is called a:

• A. Neuron
• B. Astrocyte
• C. Neurotransmitter
• D. Synapse

Correct answer: A

Rationale: The basic unit of communication in the nervous system is a neuron. Neurons are specialized cells that transmit information through electrical and chemical signals. They form complex networks to relay messages throughout the body. Astrocytes are support cells that help maintain the environment around neurons. Neurotransmitters are chemicals that transmit signals between neurons at synapses. A synapse is a junction between two neurons where communication occurs. However, the primary unit responsible for communication in the nervous system is the neuron, making it the correct answer.

6. An ancient Egyptian pyramid has a square base with side lengths of 20 meters and a remaining height (after erosion) of 10 meters. Its original height was 30 meters. What was the volume of the pyramid in its original state?

• A. 12000 cu m
• B. 6000 cu m
• C. 18000 cu m
• D. 24000 cu m

Correct answer: A

Rationale: Use the formula for the volume of a pyramid with the original height and base area.

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