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ATI TEAS Science — Original Latest Version Study Set

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Sample questions from ATI TEAS Science — Original Latest Version Study Set

This material has 50 questions with answers and rationales. Here are the first 5.

  1. 1.Which chamber of the heart pumps oxygen-rich blood into the aorta?

    • A.Right atrium.
    • B.Left atrium.
    • C.Right ventricle.
    • D.Left ventricle.

    Rationale: The left ventricle pumps oxygen-rich blood through the aorta to the body. The right ventricle sends blood to the lungs, while both atria receive blood returning to the heart. Remember that ventricles pump blood out of the heart.

  2. 2.Which of the following describes blood flow through the pulmonary circulation?

    • A.From the right ventricle to the lungs and back to the left atrium.
    • B.From the left atrium to the lungs and back to the right ventricle.
    • C.From the left ventricle to the body and back to the right atrium.
    • D.From the right atrium to the body and back to the left ventricle.

    Rationale: Pulmonary circulation carries deoxygenated blood from the right ventricle to the lungs and returns oxygenated blood to the left atrium. The other pathways either describe systemic circulation incorrectly or reverse the normal route through the heart. The pulmonary circuit connects the heart and lungs.

  3. 3.Which structure in the kidney is the basic functional unit that filters blood and forms urine?

    • A.Neuron.
    • B.Nephron.
    • C.Alveolus.
    • D.Villus.

    Rationale: A nephron filters blood and adjusts water and solute levels as urine is formed. An alveolus exchanges gases, a neuron transmits signals, and a villus increases intestinal absorption. Nephrons are the functional units of the kidneys.

  4. 4.Which hormone lowers blood glucose by promoting glucose uptake into cells?

    • A.Thyroxine.
    • B.Glucagon.
    • C.Insulin.
    • D.Cortisol.

    Answer and rationale are in the full material.

  5. 5.Which of the following is the primary site of gas exchange in the lungs?

    • A.Bronchi.
    • B.Pleura.
    • C.Alveoli.
    • D.Trachea.

    Answer and rationale are in the full material.

+45 more questions with answers and rationales

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Released October 30, 2026 · Independent original practice and study material.