ATI TEAS Practice Science Test

Correct Answer: D

Rationale: The impaired posterior pituitary gland leads to decreased production of antidiuretic hormone (ADH), resulting in the inability to concentrate urine. This causes the patient to excrete large volumes of dilute urine. Thirst (choice A) is a symptom of diabetes insipidus, a condition related to ADH deficiency. Tiredness (choice B) and weight gain (choice C) are not directly associated with impaired posterior pituitary function. Thus, choice D, concentrated urine, is the correct symptom related to kidney function in this scenario.

Correct Answer: B

Rationale: The purpose of an electrocardiogram (ECG) is to display the heart's rate and rhythm. It measures the electrical activity of the heart, showing how well it is functioning. By analyzing the ECG waveform, healthcare providers can assess the heart's health, detect any abnormalities, and diagnose various heart conditions. It provides crucial information about the heart's electrical impulses, such as the heart rate, rhythm, and any potential irregularities like arrhythmias. Therefore, choice B is correct. Choices A, C, and D are incorrect because an ECG does not indicate the rate of blood flow, identify a person's blood group type, or determine cell type in a blood sample.

Correct Answer: D

Rationale: The correct answer is D because a taxonomic system classifies living things based on their molecular traits, allowing for a more accurate and scientific approach to categorizing organisms. This system helps in understanding evolutionary relationships and genetic similarities among species. Choice A is incorrect as behavior is not the primary focus of taxonomy. Choice B is not the main purpose of a taxonomic system, although naming new organisms is a part of it. Choice C is incorrect as distinguishing living things from nonliving things is more related to biology in general rather than specifically to taxonomy.

Correct Answer: A

Rationale: The dependent variable in a study is the outcome that is being measured or tested. In this scenario, the weight of the fish is being measured weekly as a result of being fed different amounts of food daily. The fish weight is directly influenced by the amount of food they consume, making it the dependent variable. This is the variable that changes in response to the independent variable, which is the amount of food given. Summary: A: Weight of the fish - Correct, as it is the outcome being measured. B: Type of food used - Incorrect, as this is not the variable being tested. C: Number of fish tanks - Incorrect, as this is not the variable being measured. D: Frequency of feedings - Incorrect, as this is not the outcome being tested.

Correct Answer: A

Rationale: The correct answer is A: Embryogenesis. During the first trimester of gestation, the developing organism goes through the process of embryogenesis, where the embryo forms and major organ systems begin to develop. Fertilization (B) occurs at the beginning of pregnancy, not during the first trimester. Meiosis (C) is the process of cell division that produces gametes, not directly related to the first trimester of gestation. Menstruation (D) is the shedding of the uterine lining if fertilization does not occur, not a developmental process during pregnancy.