ATI TEAS Science

Correct Answer: C

Rationale: The correct answer is C because sinuses warm, humidify, and filter air before it reaches the lungs, improving respiratory efficiency. Sinuses have mucous membranes that trap particles and pathogens, preventing them from entering the respiratory system. This process helps to protect the lungs and maintain their health. Choices A, B, and D are incorrect because sinuses do not primarily trap pathogens, direct air down the trachea, or sweep away pathogens towards the top of the trachea.

Correct Answer: C

Rationale: The correct answer is C, Epididymis. Sperm maturation occurs in the epididymis, a coiled tube located on the back of each testicle. Here, sperm gain motility and the ability to fertilize an egg. Seminal vesicles (A) and prostate gland (B) produce fluids that combine with sperm to form semen but do not play a role in sperm maturation. Vas deferens (D) is a tube that carries mature sperm from the epididymis to the urethra but is not the site of sperm maturation.

Correct Answer: C

Rationale: The correct answer is C: Retina. Visual processing begins in the retina because it contains specialized cells called photoreceptors (rods and cones) that convert light into electrical signals. These signals are then transmitted through the optic nerve to the brain for further processing. The cornea (A) is the transparent outer layer of the eye that helps focus light, the optic nerve (B) transmits signals from the retina to the brain, and the eyelid (D) is a protective covering for the eye and does not play a role in visual processing.

Correct Answer: C

Rationale: The correct answer is C: An inference. This statement involves drawing a conclusion based on evidence, rather than directly observing the fact. The conclusion that someone must have forgotten to water the flower is inferred from the observation that the flower is dead. It goes beyond simple observation (Choice B) and does not involve categorizing or grouping (Choice A) or collecting items (Choice D). Inference involves using reasoning and evidence to make an educated guess or interpretation, which fits the scenario described in the statement.

Correct Answer: B

Rationale: The correct answer is B: The pelvic cavity. The pelvic cavity is located in the lower part of the trunk and houses the urinary bladder, urethra, and ureters. The thoracic cavity (A) contains the heart and lungs, the abdominal cavity (C) contains the stomach, liver, and intestines, and the spinal cavity (D) houses the spinal cord. Therefore, B is the correct answer as it specifically contains the organs mentioned in the question.