what is the primary function of white blood cells
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Nursing Elites

ATI TEAS 7

Practice TEAS Science Test

1. What is the primary function of white blood cells?

Correct answer: B

Rationale: The correct answer is B: "To fight infection." White blood cells are primarily responsible for fighting infections and foreign invaders in the body, making them a critical component of the immune system. Choice A, "To carry oxygen," is incorrect as red blood cells are responsible for oxygen transport. Choice C, "To transport nutrients," is incorrect as this function is mainly attributed to blood plasma and other specialized cells. Choice D, "To transport waste," is also incorrect as waste removal is primarily handled by the kidneys and the lymphatic system, not white blood cells.

2. Which of the following could accurately subtitle this passage?

Correct answer: A

Rationale: The passage outlines significant events in Clara Barton's life, starting from her birth in Massachusetts, moving to Washington D.C., her humanitarian work during the Civil War, and her later efforts in Europe and with the Red Cross. The most accurate subtitle for this passage would be 'The start of the revolution,' as it refers to the beginning and progression of Barton's revolutionary work in humanitarian aid and establishing the American branch of the International Red Cross Organization. The other choices are not suitable subtitles as they do not encompass the breadth of Barton's impactful life events described in the passage.

3. Which skin condition is characterized by patches of inflamed, reddened skin and is often triggered by allergens or stress?

Correct answer: A

Rationale: Eczema is the correct answer. It presents as patches of inflamed, reddened skin and can be triggered by allergens, stress, or other factors. Psoriasis, on the other hand, is characterized by red, scaly patches rather than inflamed and reddened skin. Acne manifests as pimples and blemishes, not patches of inflamed skin. Vitiligo is characterized by the loss of skin color in patches, which is distinct from the symptoms described in the question.

4. If 9.5% of a town's population of 51,623 people voted for a proposition, approximately how many people voted for the proposition?

Correct answer: B

Rationale: To find the approximate number of people who voted for the proposition, multiply the town's population by the percentage that voted: 51,623 * 9.5% = 51,623 * 0.095 ≈ 4,904. Therefore, approximately 5,000 people voted for the proposition. Choice A (3000), C (7000), and D (10000) are incorrect because they do not accurately represent 9.5% of the town's population.

5. Which of the following lists the structures found beneath the rib in descending order?

Correct answer: C

Rationale: The correct order of structures found beneath the rib in descending order is Vein → Artery → Nerve. This sequence is important to remember for medical procedures like inserting a chest tube to ensure precision and avoid complications. Choice A is incorrect because the nerve is not typically the structure closest to the rib. Choice B is incorrect as the vein is usually closer to the rib than the nerve. Choice D is incorrect as the artery is usually closer to the rib than the nerve.

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