ATI TEAS 7 Science

Correct Answer: B

Rationale: The correct answer is B: Neuron. A neuron is the basic structural and functional unit of the nervous system because it is responsible for transmitting electrical and chemical signals within the nervous system. Neurons have three main parts: dendrites, cell body, and axon. Dendrites receive signals from other neurons, the cell body processes these signals, and the axon transmits signals to other neurons or to muscles and glands. The other choices, A: Axon, C: Dendrite, and D: Synapse, are all components of a neuron but do not individually represent the complete functional unit of the nervous system.

Correct Answer: C

Rationale: The primary function of the lymphatic system is to fight infection and remove excess fluid. Lymph nodes contain white blood cells that help fight pathogens. Lymphatic vessels collect excess fluid from tissues and transport it back to the bloodstream, aiding in immune response. Other choices are incorrect because A: Oxygen transport is primarily done by the circulatory system, B: Blood filtration is mainly carried out by the kidneys, and D: Hormone transport is primarily through the circulatory system.

Correct Answer: C

Rationale: Failed to generate a rationale after 5 retries.

Correct Answer: B

Rationale: The correct answer is B: The angle of the incline. The acceleration of a ball rolling down an inclined plane is primarily determined by the angle of the incline. A steeper incline will result in a greater component of the gravitational force acting parallel to the incline, leading to a higher acceleration. The material of the ball (choice A) does not affect the acceleration in this scenario. Air resistance (choice C) may have a small impact but is usually negligible for small objects like balls. The ball's initial velocity (choice D) does not affect the acceleration once the ball is released from rest on the incline.

Correct Answer: B

Rationale: The correct answer is B: Mitosis. Mitosis is the process by which a cell divides into two identical daughter cells. It involves several distinct phases: prophase, metaphase, anaphase, and telophase. During mitosis, the genetic material is equally distributed between the two daughter cells, ensuring genetic continuity. Explanation of other choices: A: Meiosis is a type of cell division that produces gametes (sperm and egg cells) with half the number of chromosomes as the parent cell. C: Fission is a general term for any process of cell division, which can refer to both mitosis and binary fission. D: Binary fission is a form of asexual reproduction in prokaryotic cells, such as bacteria, where the cell divides into two equal parts.