Practice TEAS Science Test

Correct Answer: B

Rationale: The correct answer is B: Measuring wheel and mathematical formula. To measure the volume of a cube, you need to measure the length of one side using a measuring wheel and then use the formula V = s^3, where V is the volume and s is the length of one side. This method is suitable because it directly measures the side length of the cube, which is essential for calculating the volume accurately. Choice A, the triple beam balance, is used for measuring mass, not volume. Choice C, the graduated cylinder, is used to measure the volume of irregularly shaped objects using water displacement method, not ideal for a cube. Choice D, the measuring wheel alone, does not provide the formula for calculating the volume of a cube, making it less suitable compared to choice B.

Correct Answer: B

Rationale: The correct answer is B: Hip. A ball-and-socket joint allows for a wide range of motion in multiple directions. The hip joint fits this description, with the rounded head of the femur fitting into the socket of the pelvis. This joint enables movements like flexion, extension, abduction, adduction, and rotation. The other choices, such as the knee (A), elbow (C), and wrist (D), are not ball-and-socket joints. The knee is a hinge joint, the elbow is a hinge joint as well, and the wrist is a condyloid joint.

Correct Answer: A

Rationale: The correct answer is A: To transport oxygen and nutrients. The cardiovascular system is responsible for circulating blood throughout the body to deliver oxygen and nutrients to tissues and organs. This function supports cell metabolism and overall body function. Choice B is incorrect because while the cardiovascular system does play a role in blood pressure regulation, it is not its primary function. Choice C is incorrect as digestion is primarily carried out by the digestive system. Choice D is incorrect as waste filtration is mainly performed by the excretory system.

Correct Answer: B

Rationale: Cystic fibrosis is the correct answer because it is a genetic condition that primarily affects the respiratory system by causing mucus buildup in the lungs, leading to breathing difficulties and recurrent lung infections. This condition is caused by mutations in the CFTR gene. Asthma (A) is a chronic respiratory condition characterized by inflammation and narrowing of the airways but is not a genetic disorder. Mycosis (C) refers to fungal infections and does not specifically affect the respiratory system. Surfactant Deficiency (D) is a condition where insufficient surfactant is produced in the lungs, leading to respiratory distress in newborns, but it is not primarily a genetic condition affecting the respiratory system.

Correct Answer: B

Rationale: The correct answer is B: Thyroxine. Thyroxine is produced by the thyroid gland and plays a crucial role in regulating the body's metabolism by controlling the rate at which cells use energy. Insulin is a hormone that regulates blood sugar levels, not metabolism. Melatonin is responsible for regulating sleep-wake cycles, not metabolism. Adrenaline, also known as epinephrine, is involved in the fight or flight response and does not directly regulate metabolism.