according to the law of conservation of energy the total amount of energy in a closed system
Logo

Nursing Elites

ATI TEAS 7

ati teas 7 science

1. According to the Law of Conservation of Energy, what happens to the total amount of energy in a closed system?

Correct answer: C

Rationale: According to the Law of Conservation of Energy, the total amount of energy in a closed system remains constant. This principle states that energy cannot be created or destroyed within the system but can only be transformed from one form to another. Therefore, the total energy within the system is conserved and does not change over time. Choice A is incorrect because the total energy in a closed system does not increase over time, as it remains constant. Choice B is incorrect as the total energy does not decrease over time within a closed system. Choice D is incorrect as the conservation of energy is not dependent on the temperature of the system, but rather on the transformation and conservation of energy within the system. Understanding this concept is fundamental for understanding the behavior of energy in various physical systems and processes.

2. Which of the following substances is a common base found in household products?

Correct answer: B

Rationale: The correct answer is B, Ammonia (NH₃). Ammonia is commonly found in household products and is used in cleaning agents due to its alkaline properties. Sodium chloride (NaCl) is a common salt and not a base. Vinegar is acetic acid, which is acidic in nature. Lemon juice contains citric acid, making it acidic as well. Therefore, ammonia is the only base among the choices provided.

3. What is hydroxyapatite?

Correct answer: A

Rationale: Hydroxyapatite is a mineral compound composed of calcium and phosphorus that plays a crucial role in strengthening the collagen matrix of bones, contributing to their structural integrity and hardness. It is a key component of bone tissue and provides the mineralization necessary for bone strength and density. Choice B is incorrect because the structural unit of a bone is the osteon or Haversian system, not hydroxyapatite. Choice C is incorrect as it describes cartilage, not hydroxyapatite. Choice D is incorrect as it refers to the epiphysis, which is not synonymous with hydroxyapatite.

4. Why is the stratified squamous epithelium found in the skin adapted for?

Correct answer: C

Rationale: The stratified squamous epithelium found in the skin is adapted for protection. This type of epithelium forms a tough, protective barrier against physical, chemical, and biological damage. Its multiple layers of cells help prevent the entry of pathogens and reduce water loss from the body, making it essential for shielding the underlying tissues. Choices A, B, and D are incorrect because stratified squamous epithelium is not specialized for absorption, secretion, or gas exchange. Instead, its primary function is to protect the underlying tissues and organs from external damage and dehydration.

5. Which group of antibiotics targets the cell wall of bacteria?

Correct answer: A

Rationale: Penicillins are a group of antibiotics that target the bacterial cell wall by inhibiting the synthesis of peptidoglycan, a vital component of the cell wall. This inhibition weakens the cell wall, leading to bacterial cell lysis and death. Penicillins are particularly effective against Gram-positive bacteria due to their mechanism of action. Tetracyclines (B) inhibit protein synthesis, Macrolides (C) interfere with bacterial ribosomes, and Fluoroquinolones (D) target bacterial DNA gyrase and topoisomerase IV. Unlike Penicillins, these antibiotics do not directly target the cell wall of bacteria.

Similar Questions

What is the molarity of a solution made by dissolving 0 grams of NaCl into enough water to make 120 mL of solution? The atomic mass of Na is 23 g/mol and Cl is 35.5 g/mol.
When water boils, it changes from a liquid to a gas. This is an example of a:
What type of immunity is acquired through vaccination?
Which type of joint allows for the greatest range of motion?
Which statement correctly describes the concept of ionization energy?

Access More Features

ATI TEAS Premium Plus
$149.99/ 90 days

  • Actual ATI TEAS 7 Questions
  • 3,000 questions with answers
  • 90 days access

ATI TEAS Basic
$99/ 30 days

  • 3,000 Questions with answers
  • 30 days access

Other Courses