ATI TEAS 7 Science

Correct Answer: A

Rationale: The correct arrangement of the small intestine segments is Duodenum, Jejunum, Ileum. The duodenum is the first segment where digestion occurs. The jejunum is the middle segment responsible for absorption, followed by the ileum for further absorption and passage of undigested material to the large intestine. Option A is correct as it follows the natural anatomical order and functional progression of the small intestine segments. Options B and C are incorrect as they incorrectly order the segments. Option D is also incorrect as there is a correct arrangement.

Correct Answer: A

Rationale: The correct answer is A: Hypothesis. In the scientific method, a scientist creates a hypothesis based on observations or research. A model can be a representation or simulation of a process or system that helps in understanding or predicting outcomes. By creating a model during the hypothesis step, the scientist can visually or conceptually test their proposed explanation or prediction. This aids in designing experiments or gathering data to test the hypothesis further. Data analysis (B) occurs after experimentation, where collected data is analyzed. Experimentation (C) involves testing the hypothesis through controlled experiments. Conclusion (D) is the final step where the scientist interprets the results.

Correct Answer: C

Rationale: The correct answer is C: To regulate body functions through hormones. The endocrine system consists of glands that produce hormones to regulate various bodily functions like metabolism, growth, and reproduction. This system helps maintain homeostasis by communicating through chemical messengers. Choices A, B, and D are incorrect as fighting infection is primarily the role of the immune system, oxygen transportation is done by the respiratory system, and food breakdown is the function of the digestive system.

Correct Answer: C

Rationale: The correct answer is C: Change in color. Chemical reactions involve the formation of new substances, which is a key characteristic. Energy is either released or absorbed during a chemical reaction, leading to changes in temperature. However, changes in color are not always indicative of a chemical reaction as it can be influenced by factors like impurities or physical changes. Therefore, C is not a reliable characteristic of a chemical reaction compared to the other choices.

Correct Answer: C

Rationale: The correct answer is C: Electroencephalogram (EEG). EEG is used to record the electrical activity of the brain by placing electrodes on the scalp. It is specifically designed to measure brain waves. A CAT scan (A) uses X-rays to create detailed images of the brain's structure, not its electrical activity. An MRI scan (B) uses magnetic fields to produce detailed images of the brain's anatomy, not its electrical activity. X-ray (D) is used to visualize bones and dense tissues, not brain activity. EEG is the only option that directly measures the brain's electrical activity, making it the correct choice.