which of the following is the main function of the stomach
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ATI TEAS 7

TEAS Test 7 science quizlet

1. What is the primary function of the stomach?

Correct answer: A

Rationale: The main function of the stomach is to store food, churn it, and break it down into smaller pieces through mechanical digestion. This process is facilitated by the mixing of food with gastric juices, including stomach acid. The mechanical breakdown in the stomach helps initiate the digestion of food before it progresses to the small intestine for further digestion and nutrient absorption. Absorption of nutrients into the bloodstream primarily occurs in the small intestine, not the stomach. Enzymes that aid in digesting food are primarily produced in the pancreas and small intestine, not in the stomach. The elimination of waste products from the body mainly occurs through the large intestine and rectum, not the stomach.

2. Which of the following cell organelles is the site of lipid synthesis?

Correct answer: A

Rationale: The correct answer is the smooth endoplasmic reticulum. This organelle lacks ribosomes on its surface, unlike the rough endoplasmic reticulum, which is involved in protein synthesis. The enzymes present in the smooth endoplasmic reticulum are responsible for synthesizing lipids such as phospholipids and steroids. Choice B, ribosomes, are responsible for protein synthesis and not lipid synthesis. Choice C, rough endoplasmic reticulum, is involved in protein synthesis due to the presence of ribosomes. Choice D, Golgi apparatus, is responsible for modifying, sorting, and packaging proteins for secretion, not lipid synthesis.

3. Which of the following most accurately describes the author's main conclusion?

Correct answer: B

Rationale: The correct answer is B: 'Leif Erikson deserves more credit for exploring America.' The author's main conclusion, as supported by the extract, is that Leif Erikson should receive more credit for his contributions in exploring the New World. Choice A is incorrect as it does not capture the essence of the author's conclusion, which is about recognizing Erikson's achievements rather than just labeling him as a legendary explorer. Choice C is incorrect because while Leif Erikson did convert to Christianity, the primary focus of the conclusion is on his exploration rather than his motivations. Choice D is incorrect as it only mentions one aspect of Erikson's achievements (contacting the natives) and does not encompass the broader idea of giving him more credit for his explorations.

4. Which of the following is NOT a function of the nervous system?

Correct answer: C

Rationale: The nervous system is responsible for detecting touch (option A), regulating body temperature (option B), and controlling muscle movement (option D). Producing insulin (option C) is a function of the endocrine system, which produces hormones like insulin to regulate metabolism and glucose levels. Therefore, option C is the correct answer as it is not a function of the nervous system.

5. What should be done after the soil has been loosened with a tiller or trowel?

Correct answer: A

Rationale: After the soil has been loosened with a tiller or trowel, the next step should be to mix fertilizer or compost into the loosened soil. This action is crucial as it provides essential nutrients for plant growth, improves soil fertility, and promotes healthy plant development. Digging a trench, cutting potatoes, or mounding soil around the base of the plant are not tasks typically performed immediately after loosening the soil. Therefore, option A is the correct choice as it aligns with the standard practice of enhancing soil quality before planting.

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