ATI TEAS 7 Science

Correct Answer: B

Rationale: The correct answer is B: Alveoli. Alveoli are tiny air sacs in the lungs where gas exchange occurs between the air in the lungs and the blood. Oxygen from the air enters the blood, and carbon dioxide from the blood exits into the air. Trachea (A) is the windpipe that carries air to and from the lungs. Bronchi (C) are the main airways that branch off from the trachea. Diaphragm (D) is a muscle that helps with breathing by expanding and contracting the lungs, but it is not directly involved in gas exchange.

Correct Answer: B

Rationale: The correct answer is B (25 grams) as the recommended daily fiber intake for adults by the American Heart Association is 25-30 grams. Fiber helps with digestion, heart health, and weight management. Option A (10 grams) is too low and insufficient for daily needs. Option C (35 grams) and D (50 grams) are excessive and may lead to digestive issues like bloating or gas. Therefore, B is the most appropriate choice for optimal health benefits.

Correct Answer: B

Rationale: The correct answer is B: Liver. The liver is responsible for detoxifying chemicals and metabolizing drugs due to its enzymes that break down substances. It also helps in excreting waste products. The kidneys (A) filter blood and regulate fluid balance. The heart (C) pumps blood throughout the body. The pancreas (D) produces digestive enzymes and insulin. Thus, the liver is the primary organ involved in detoxification and drug metabolism.

Correct Answer: B

Rationale: The correct answer is B: Ball-and-socket joint. This joint allows for the greatest range of motion due to its structure, where a rounded bone fits into a cup-like socket, enabling movement in multiple directions. This design permits flexion, extension, abduction, adduction, and rotation, providing a wide range of motion compared to other joint types. A: Hinge joints allow movement in one plane (like the elbow or knee). C: Pivot joints allow rotation around a central axis (like the neck). D: Saddle joints have more limited motion (like the thumb).

Correct Answer: A

Rationale: Acceleration is defined as the rate of change of velocity over time. This means that acceleration measures how quickly an object's velocity is changing. By choosing answer A, "Change in velocity over time," you are correctly identifying the definition of acceleration. Choice B, "Speed in a straight line," is incorrect because speed does not take into account the change in velocity, which is vital in defining acceleration. Choice C, "Distance covered in a given time," is incorrect as it pertains to speed or distance traveled, not acceleration, which specifically relates to changes in velocity. Choice D, "Force applied to an object," is incorrect because force is a completely different concept in physics and is not directly related to the definition of acceleration.