ATI TEAS Science

Correct Answer: A

Rationale: The correct answer is A: The smallest amount of stimulus required for an individual to feel a sensation. The sensory threshold refers to the minimum level of stimulation needed for an individual to detect a particular sensation. This threshold varies from person to person and can be influenced by factors such as sensitivity and attention. Choice B is incorrect as it specifically relates to feeling pain, which is a different sensory experience. Choice C is incorrect as it refers to a response to a stimulus (movement) rather than the detection of sensation. Choice D is incorrect as it describes the origin of the stimulus rather than the threshold for sensation detection.

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: A

Rationale: The correct answer is A: A plasma membrane. Both prokaryotes and eukaryotes have a plasma membrane as their outer boundary. The plasma membrane is essential for maintaining cell integrity, controlling the passage of molecules in and out of the cell, and facilitating communication with the external environment. Prokaryotes lack a nucleus enclosed by a membrane (choice B), which is a defining feature of eukaryotic cells. Eukaryotes have organelles (choice C) that are membrane-bound structures, unlike prokaryotes that lack membrane-bound organelles. A nucleoid (choice D) is a region in prokaryotic cells where the genetic material is located, but it is not enclosed by a membrane like the nucleus in eukaryotic cells.

Correct Answer: B

Rationale: Failed to generate a rationale after 5 retries.

Correct Answer: B

Rationale: The correct answer is B: A model. Models are representations that simplify complex phenomena, making them easier to study and understand. They often simulate natural patterns or occurrences that are challenging or impossible to directly experience. Models help researchers make predictions and test hypotheses. A: A theory is an explanation based on observed facts and supported by evidence. Theories provide frameworks to understand natural phenomena but are not direct representations of patterns that are difficult to experience. C: A law is a statement that describes a fundamental principle of nature based on repeated observations. Laws summarize patterns in nature but do not necessarily represent occurrences that are difficult to experience directly. D: An observation involves directly witnessing or perceiving a natural event. Observations are direct experiences and do not fall under the category of representing patterns that are hard to experience directly.