what is the primary function of the digestive system
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ATI TEAS 7

ATI TEAS 7 Science

1. What is the primary function of the digestive system?

Correct answer: A

Rationale: The correct answer is A: 'To break down food into nutrients.' The primary function of the digestive system is to break down food into nutrients that can be absorbed by the body for energy, growth, and repair. The digestive system is not responsible for absorbing oxygen (Choice B), as that is the role of the respiratory system. While the digestion process does release energy from nutrients, the primary function is not to produce energy (Choice C), but rather to extract nutrients for energy production. Regulating body temperature (Choice D) is primarily handled by the thermoregulatory mechanisms in the body, such as the skin and sweat glands, not the digestive system.

2. What is the primary function of red blood cells?

Correct answer: B

Rationale: The correct answer is B: To transport oxygen. Red blood cells play a crucial role in carrying oxygen from the lungs to all the tissues and organs in the body. This oxygen transport is essential for cellular respiration, where oxygen is used in the production of energy. Red blood cells do not primarily transport nutrients, fight infection, or produce antibodies. Choice A is incorrect because while red blood cells do carry some nutrients, their primary function is to transport oxygen. Choice C is incorrect because immune cells, not red blood cells, are responsible for fighting infections. Choice D is incorrect as antibody production is mainly carried out by specialized white blood cells, not red blood cells.

3. Which of the following sentences regarding thesis statements in the writing process is correct?

Correct answer: A

Rationale: The correct answer is A. A thesis statement should be specific to provide clear direction for the paper and focus the argument. This helps guide the writing process and ensures that the paper stays on track. Choice B is incorrect because the written work should support and prove the thesis statement, not disprove it. Choice C is incorrect because the thesis statement typically appears at the beginning of a paper to introduce the main argument. Choice D is incorrect because supporting evidence is crucial in any thesis statement, regardless of whether it expresses an opinion or not.

4. Which of the following best explains the purpose of the parentheses in the sentence?

Correct answer: D

Rationale: The purpose of the parentheses in the sentence is to set off useful information that does not fit directly into the flow of the sentence. Parentheses are commonly used to provide additional details, explanations, or examples that are helpful but not essential to the main point of the sentence. In this case, the information about the Austro-Hungarian Empire is presented in parentheses to offer context but is not crucial to the main idea being communicated. Choices A, B, and C are incorrect as they do not accurately describe the function of parentheses in this context.

5. The sheer number of people in the audience overwhelmed the actress as she peeked through the curtain before scene one. Which of the following correctly describes an error in the sentence above?

Correct answer: B

Rationale: The correct answer is B. In this context, 'peaked' should be 'peeked,' meaning to take a quick look. The other choices are incorrect: A is wrong because 'sheer' is the correct term referring to the absolute or complete number of people; C is incorrect as 'through' is the right term indicating looking by going across something; D is inaccurate as 'scene' is the correct term for a part of a play or film.

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