NLN NEX Science Practice Test 2025 [Timed] 55 Questions

Last Updated on March 18, 2025

NLN NEX Science Practice Test 2025 [Timed] 55 Questions. Try our free Science practice test questions from Biology, Chemistry, Anatomy, Physiology, and Health to prepare for the NEX (Nursing Entrance Exam).

This test has a total of 55 multiple-choice questions. You have to finish this test within 60 minutes. You can check your score at the end of the test. The actual test consists of the following  topics

  • Science (55 scored + 5 pretest/unscored) Biology: 20 items Chemistry: 5 items Anatomy: 11 items Physiology: 11 items Health: 8 items

NLN NEX Science Practice Test 2025

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NLN NEX Science Practice Test

NLN NEX Science Practice Test
Total Items: 55
Time Limit: 60 Minutes

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1) Which of the following are functions of the urinary system?

I. Synthesizing calcitriol and secreting erythropoietin
II. Regulating the concentrations of sodium, potassium, chloride, calcium, and other ions
III. Reabsorbing or secreting hydrogen ions and bicarbonate
IV. Detecting reductions in blood volume and pressure

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2) During breathing, the air pressure in the lungs changes as a result of

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3) Given patients whose age, weight, sex, and temperament are nearly identical, what should the normal values of blood pressure and pulse be during routine examinations and measurements by a physician?

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4) Synapses are the gaps between

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5) Animals like snails and clams contained within a hard shell differ from humans because they lack

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6) Avogadro’s number is the number of

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7) Which of the following is not a type of muscle?

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8) Which locations in the digestive system are sites of chemical digestion?

I. Mouth
II. Stomach
III. Small Intestine

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9) Which vitamin is essential for calcium absorption and bone health?

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10) Given one mole of O₂ gas at STP, what is the mass of this sample?

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11) The iris and retina are parts of the

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12) The name of the compound CH₃–CH₂–CH₂–CH₃ is most likely

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13) A secondary defense for the body against pathogens is

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14) Which statement about white blood cells is true?

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15) The process by which oxygen travels from the air into your lungs and then into your blood is called

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16) The ribs are ______ to the lungs in the human body.

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17) Which reproductive organ belongs to a different system from the other three?

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18) Which statement does not have the same truth value as the others?

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19) Which is the cellular organelle used for digestion to recycle materials?

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20) The function of the diaphragm in a human being is

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21) Which of the following are considered normal values for the measurements of a person’s pulse and blood pressure?

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22) Which of the following structures is unique to eukaryotic cells?

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23) The compound CH₂=CH–CH₂–CH₂–CH₃ is an example of

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24) In classifying all living things on Earth, which of the following groups would sort all life into two groups?

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25) The organ that works to detoxify the blood and to produce bile is the

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26) According to the table above, a patient with an elevated PaCO₂ count needs

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27) Which muscle pushes food through the digestive system?

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28) Yeast is used to make bread rise because

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29) The arrow in the following diagram represents the wave’s

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30) The word renal refers to the

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31) The brain and the spinal cord make up the

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32) Salt is added to a sample of water. Which of the following is true?

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33) Organic compounds are the basis for life as we know it because

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34) A person gets hit in the face with a puck while playing ice hockey and fractures a bone. Which bone is a most likely candidate for this fracture?

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35) Which substance shows a decrease in solubility in water with an increase in temperature?

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36) The heart and veins have valves to ensure that

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37) Given a sample of C₆H₁₂O₆(aq), which of the following is true?

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38) The small intestine contains a large quantity of villi that help

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39) What is the temperature as shown on this thermometer?

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40) The heart is composed of which type of tissue?

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41) What is the percent of oxygen in H₂O?

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42) The retina transmits nerve impulses to the brain via the

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43) A cell is in a solution in which the concentration of solutes is higher inside the cell than outside the cell. The cells will likely

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44) Exactly 2.0 moles of an element weigh 8.0 grams. Which of the following is true?

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45) If 58.5 g of NaCl (1 mole of NaCl) are dissolved in enough water to make 0.500 L of solution, what is the molarity of this solution?

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46) As water is evaporated from a solution, the concentration of the solute in the solution will

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47) Ligaments hold

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48) Which of the following glands is not paired up with a hormone that it produces?

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49) Which of the following causes and effects would occur last in a shallow forest pond that is not fed with a source of freshwater replacement like a larger river?

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50) The larynx is covered by the ______ so that food does not enter the trachea.

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51) The growth and development of bone is assisted by the use of vitamin D because vitamin D can

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52) Which of the following is a way in which mitosis differs from meiosis?

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53) As shown in the heart diagram on the previous page, separating the left and right sides of the heart is the

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54) Quantities having both magnitude and direction are

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55) Which of the following statements is true?

Your score is

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