ati teas 7 science

Correct Answer: C

Rationale: The correct answer is C: Peripheral nervous system. This system consists of nerves that connect the sensory organs (such as eyes, ears, skin) to the central nervous system (brain and spinal cord). It transmits sensory information from these organs to the CNS for processing. The autonomic nervous system (A) controls involuntary functions, somatic nervous system (B) controls voluntary movements, and central nervous system (D) processes and integrates information but does not directly transmit signals from sensory organs.

Correct Answer: B

Rationale: Ductility refers to the ability of a substance to be drawn into thin wires. This is because ductile materials can undergo plastic deformation without breaking when subjected to tensile stress. Conductivity (choice A) refers to the ability to conduct electricity, viscosity (choice C) refers to a fluid's resistance to flow, and malleability (choice D) refers to the ability of a substance to deform under compressive stress without breaking. Therefore, the correct answer is B as it specifically relates to the property of being drawn into thin wires.

Correct Answer: B

Rationale: The correct answer is B: Refraction. Refraction occurs when light bends as it passes through different mediums of varying densities, such as hot air above a desert surface. This bending of light causes the mirage effect where distant objects appear distorted or displaced. Diffraction (A) is the bending of light around obstacles, not relevant in this context. Interference (C) involves the interaction of light waves, not applicable to mirages. Polarization (D) is the orientation of light waves, unrelated to the mirage effect in deserts.

Correct Answer: A

Rationale: Gas exchange takes place in the alveoli, which are tiny air sacs at the end of the bronchioles. Alveoli have a large surface area and thin walls, allowing for efficient exchange of oxygen and carbon dioxide. Bronchioles, bronchi, and trachea are part of the airway passages and are not directly involved in gas exchange. Alveoli are specifically designed for gas exchange due to their structure and proximity to the capillaries.

Correct Answer: C

Rationale: The correct answer is C: Electroencephalogram (EEG). EEG is used to record the electrical activity of the brain by placing electrodes on the scalp. It is specifically designed to measure brain waves. A CAT scan (A) uses X-rays to create detailed images of the brain's structure, not its electrical activity. An MRI scan (B) uses magnetic fields to produce detailed images of the brain's anatomy, not its electrical activity. X-ray (D) is used to visualize bones and dense tissues, not brain activity. EEG is the only option that directly measures the brain's electrical activity, making it the correct choice.