what is the function of platelets in the blood
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Nursing Elites

ATI TEAS 7

ATI TEAS Practice Test Science

1. What is the function of platelets in the blood?

Correct answer: B

Rationale: Platelets play a crucial role in clotting blood to prevent excessive bleeding when injuries occur. They are responsible for initiating the coagulation process by forming clots at the site of injury, sealing the damaged blood vessels, and preventing further blood loss. Platelets do not primarily transport oxygen, fight infection, or transport nutrients. While red blood cells are responsible for carrying oxygen, white blood cells are involved in fighting infections, and nutrients are transported by plasma, platelets' main function is related to hemostasis and wound healing.

2. What is 0.75 as a fraction?

Correct answer: A

Rationale: To convert a decimal to a fraction, you can write the decimal as a fraction with the decimal part as the numerator and a power of 10 as the denominator. In this case, 0.75 can be written as 75/100. Simplifying this fraction by dividing both the numerator and denominator by 25 gives you 3/4. Therefore, the correct answer is A. Choice B (7/10), Choice C (15/20), and Choice D (1/2) are incorrect because they do not represent the correct conversion of 0.75 into a fraction.

3. Which of the following suffixes has an action that means 'relating to'?

Correct answer: A

Rationale: The correct answer is '-ic.' The suffix '-ic' means 'relating to,' as seen in words like 'artistic' (relating to art). - 'B' is incorrect as the suffix '-ology' refers to the study of a subject, not 'relating to.' - 'C' is incorrect as the suffix '-ation' is used to form nouns expressing an action or process, not 'relating to.' - 'D' is incorrect as the suffix '-ate' is used to form verbs or nouns denoting an office, function, or rank, not 'relating to.'

4. Which cavity contains all of the frontal cavities? Choose only ONE best answer.

Correct answer: D

Rationale: The correct answer is D: Ventral. The ventral cavity includes both the thoracic and abdominopelvic cavities. The frontal cavities are part of the ventral cavity, which is located towards the front of the body, while the dorsal cavity is towards the back. The dorsal cavity contains the cranial and vertebral cavities, not the frontal cavities. The thoracic cavity is part of the ventral cavity but does not encompass all the frontal cavities. The abdominopelvic cavity is also part of the ventral cavity, but it does not include all of the frontal cavities. Therefore, the ventral cavity is the correct choice as it encompasses all the frontal cavities.

5. How is this passage structured?

Correct answer: C

Rationale: The passage is structured in chronological order as it presents events in the order in which they occurred. It starts with Harriet Tubman's background as a slave, then progresses through her marriage, escape, and subsequent actions to help other slaves. Each event is presented in a time sequence, making it clear that the passage follows a timeline of events. Choices A, B, and D are incorrect because the passage does not focus on demonstrating cause and effect relationships, outlining problems and solutions, or comparing and contrasting different elements. Instead, it provides a historical account of Harriet Tubman's life in a sequential manner.

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