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Nursing Elites

ATI TEAS 7

Chemistry

1. Which of the following is a common property of both acids and bases?

Correct answer: d

Rationale: Both acids and bases conduct electricity when dissolved in water. The other choices are specific to either acids or bases.

2. Which part of the brain generates the rhythmic electrical activity responsible for brain waves?

Correct answer: D

Rationale: The correct answer is D: Reticular formation. The reticular formation is a network of neurons located in the brainstem that plays a crucial role in regulating consciousness and sleep-wake cycles. It generates the rhythmic electrical activity responsible for brain waves, which are measured by an electroencephalogram (EEG). While the cerebrum, thalamus, and hypothalamus are important parts of the brain, they do not directly generate brain waves like the reticular formation does. Understanding the specific functions of different brain regions is crucial for comprehending how the brain functions and regulates various physiological processes.

3. How is the density of a substance calculated?

Correct answer: A

Rationale: Density is the mass per unit volume of a substance.

4. A birdbath has a hemispherical bowl with a diameter of 30cm. What is its volume?

Correct answer: C

Rationale: Use half the formula for a sphere's volume: (2/3) * π * (radius)^3. Calculate the radius (15cm) and substitute: (2/3) * π * (15cm)^3 ≈ 2700 cu cm.

5. What is the meaning of the phrase "to be on the same page"?

Correct answer: B

Rationale: The phrase means to be in agreement or share the same understanding.

6. Positron emission tomography (PET) scans utilize a key property of positrons for medical imaging. What is this property?

Correct answer: B

Rationale: The correct answer is B: 'Positive charge.' Positron emission tomography (PET) scans rely on the fact that positrons are positively charged particles. When a positron is emitted during radioactive decay, it quickly collides with an electron, resulting in annihilation and the release of two gamma rays in opposite directions. These gamma rays are detected by the PET scanner to create detailed images of the body's internal organs and tissues. The positive charge of positrons is crucial for this process to occur, making option B the correct choice.

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