electroencephalography eeg measures electrical activity in the brain primarily reflecting the activity of
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ATI TEAS 7

TEAS 7 practice test science

1. Electroencephalography (EEG) measures electrical activity in the brain, primarily reflecting the activity of:

Correct answer: A

Rationale: EEG measures electrical activity in the brain, primarily reflecting the activity of neurons. Neurons are the primary cells responsible for generating electrical impulses and transmitting information in the brain. Astrocytes, oligodendrocytes, and microglia are other types of cells in the brain that have different functions and are not primarily involved in generating the electrical activity measured by EEG. Astrocytes support neuronal function, oligodendrocytes produce myelin to insulate axons, and microglia are involved in immune responses and maintaining brain health, but they do not generate the electrical impulses detected by EEG.

2. Which of the following describes an experiment?

Correct answer: D

Rationale: Option D describes an experiment because it involves testing the effects of a new drug on a group of participants. In an experiment, researchers intentionally manipulate an independent variable (in this case, the new drug) to observe its effects on a dependent variable (the participants' health outcomes). This method allows for establishing cause-and-effect relationships between variables, which is a key characteristic of experimental research design. Choices A, B, and C do not represent experiments. Choice A involves observational analysis of math grades, choice B involves observational analysis of health trends, and choice C involves a survey, none of which involve manipulating variables to establish cause-and-effect relationships.

3. What is the role of bile in digestion?

Correct answer: B

Rationale: Bile emulsifies fats, breaking them down into smaller droplets for easier digestion.

4. What is the waste product of protein digestion?

Correct answer: D

Rationale: The waste product of protein digestion is ammonia. Protein digestion breaks down proteins into amino acids, and during this process, ammonia is produced. Ammonia is toxic and needs to be converted into urea in the liver for excretion via urine. Glucose is a product of carbohydrate digestion, amino acids are building blocks of proteins, and fatty acids are the end products of fat digestion. Therefore, the correct answer is ammonia.

5. After graduating from Proviso East High School in 1966, he later went on to study law at Triton Junior College. Which of these sentences, if any, should begin a new paragraph?

Correct answer: B

Rationale: The sentence 'After graduating from Proviso East High School in 1966, he later went on to study law at Triton Junior College' marks a shift in the narrative as it introduces a new stage in the individual's journey. This change in focus warrants starting a new paragraph to clearly separate different events or developments in the person's life. Choices C and D are related to Hampton's actions during or after his time at Triton College but do not necessitate a new paragraph. Choice A is incorrect because the sentence provided is a suitable candidate for starting a new paragraph due to the change in the main topic it introduces.

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