ATI TEAS 7
Science TEAS Practice Test
1. Which of the following statements is NOT true of most metals?
- A. Most of them are good conductors of heat.
- B. Most of them are gases at room temperature.
- C. Most of them are ductile.
- D. They make up the majority of elements on the periodic table.
Correct answer: B
Rationale: The correct answer is B because most metals are not gases at room temperature; they are usually solid and good conductors of heat. Metals are generally known for being good conductors of heat, ductile, and making up the majority of elements on the periodic table. Choice A is correct as metals, in general, are good conductors of heat. Choice C is also correct as most metals exhibit ductility. Choice D is correct as metals constitute the majority of elements found on the periodic table.
2. What is the name of a condition where the heart rate is 118 beats per minute (bpm)?
- A. Tachycardia
- B. Apnea
- C. Bradycardia
- D. Tachypnea
Correct answer: A
Rationale: The correct answer is A: Tachycardia. Tachycardia is a condition characterized by a heart rate that exceeds the normal resting rate, typically above 100 bpm. In this case, a heart rate of 118 bpm falls within the range of tachycardia. Apnea (choice B) refers to the temporary cessation of breathing, not related to heart rate. Bradycardia (choice C) is a condition of an abnormally slow heart rate, opposite of the given heart rate. Tachypnea (choice D) is an abnormally rapid breathing rate, not related to heart rate.
3. Which of the following structures has the lowest blood pressure?
- A. Arteries
- B. Arterioles
- C. Venules
- D. Veins
Correct answer: D
Rationale: Veins have the lowest blood pressure among the listed structures. Blood pressure decreases as blood flows from arteries to arterioles, then to venules, and finally to veins. Veins return blood to the heart under low pressure because they have thinner walls and larger lumens compared to arteries and arterioles. This anatomical difference allows veins to accommodate a greater volume of blood without a significant rise in pressure. Arteries have the highest blood pressure to propel blood away from the heart, followed by arterioles which regulate blood flow to capillaries. Venules collect blood from capillaries and connect to veins, which then carry blood back to the heart at a lower pressure.
4. What is the role of hemoglobin in the human body?
- A. Transport oxygen in red blood cells
- B. Bind oxygen to red blood cells
- C. Carry carbon dioxide from tissues to lungs
- D. Help red blood cells transport oxygen
Correct answer: D
Rationale: The correct answer is D: 'Help red blood cells transport oxygen.' Hemoglobin acts as a carrier molecule in red blood cells, binding to oxygen in the lungs and releasing it in the tissues. It facilitates the transport of oxygen from the lungs to the tissues and aids in returning carbon dioxide from the tissues to the lungs. Choices A, B, and C are incorrect because hemoglobin itself does not transport oxygen independently or bind oxygen to red blood cells nor does it carry carbon dioxide from tissues to lungs; instead, it assists red blood cells in the transportation of oxygen.
5. What is the name for the sac-shaped structures in which carbon dioxide and oxygen exchange takes place?
- A. Kidneys
- B. Medulla oblongata
- C. Alveoli
- D. Bronchioles
Correct answer: C
Rationale: The alveoli are the tiny sac-shaped structures in the lungs where gas exchange occurs. Oxygen from the air we breathe diffuses into the bloodstream through the alveoli, while carbon dioxide, a waste product produced by cells, is removed from the blood and exhaled out of the body through the alveoli. Choices A, B, and D are incorrect. Kidneys are organs responsible for filtering waste from the blood, the medulla oblongata is a part of the brain responsible for autonomic functions, and bronchioles are smaller airway passages in the lungs that branch off from the bronchi.
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