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Nursing Elites

ATI TEAS 7

Chemistry

1. Which element is used in fluorescent lamps and emits ultraviolet light when excited?

Correct answer: A

Rationale: Mercury vapor in fluorescent lamps generates UV light that excites phosphors on the lamp's inner surface, producing visible light.

2. Which organelle is responsible for controlling the activities of the cell?

Correct answer: C

Rationale: Rationale: The nucleus is the organelle responsible for controlling the activities of the cell. It contains the cell's genetic material (DNA) and serves as the command center of the cell, regulating gene expression and directing cellular activities. The nucleus plays a crucial role in cell growth, metabolism, and reproduction. The Golgi apparatus is involved in processing and packaging proteins, the mitochondria are responsible for producing energy in the form of ATP, and ribosomes are involved in protein synthesis. However, none of these organelles have the primary function of controlling the activities of the cell like the nucleus does.

3. The ability of a substance to dissolve in another is called:

Correct answer: A

Rationale: Solubility refers to the extent to which one substance can dissolve in another to form a homogeneous solution.

4. Which of the following epithelial tissues lines the stratified squamous epithelium of the esophagus, providing a protective barrier against abrasion from food passage?

Correct answer: B

Rationale: The correct answer is B: Stratified squamous epithelium. The esophagus is a part of the digestive system that undergoes constant abrasion from the passage of food. The presence of stratified squamous epithelium is crucial in providing protection against this abrasion. Simple squamous epithelium (option A) is a single layer of flat cells and is not suitable for this function. Simple cuboidal epithelium (option C) is found in glands and ducts, not in structures exposed to mechanical stress like the esophagus. Stratified cuboidal epithelium (option D) is rare in the body and would not be found in the esophagus. Therefore, the correct answer is B because stratified squamous epithelium is specifically adapted to provide protection against abrasion in the esophagus.

5. A decorative box has a rectangular base (20cm by 15cm) and a hemispherical top with the same diameter as the base. What is the total surface area of the box (excluding the base)?

Correct answer: C

Rationale: Calculate the surface area of the lateral sides and the hemisphere, then add them up.

6. Differentiate between epithelial and connective tissue.

Correct answer: B

Rationale: Epithelial tissue covers surfaces and lines organs, while connective tissue provides support and structure throughout the body. Both are composed of cells, but their functions and locations differ.

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