TEAS Practice Test Science

Correct Answer: D

Rationale: The correct answer is D because all of the statements are accurate regarding the microscopic anatomy of heart muscle. A: Cardiac muscle is indeed striated, short, fat, branched, and interconnected. B: Intercalated discs do anchor cardiac cells together and facilitate ion passage. C: The connective tissue endomysium serves as a support structure similar to tendons. Therefore, D is correct as all statements are true about the microscopic anatomy of heart muscle.

Correct Answer: B

Rationale: The correct answer is B: To exchange gases. The main function of the respiratory system is to facilitate the exchange of oxygen and carbon dioxide between the body and the external environment. This process occurs in the lungs through breathing, where oxygen is taken in and carbon dioxide is expelled. Absorbing nutrients (A) is the function of the digestive system, transporting oxygen (C) is part of the circulatory system's role, and regulating blood pressure (D) is primarily controlled by the cardiovascular system.

Correct Answer: B

Rationale: The correct answer is B: Skeletal muscle. Skeletal muscles are attached to bones and responsible for moving the skeleton through voluntary contractions. They are under conscious control, making them voluntary muscles. Cardiac muscle (A) is found in the heart and responsible for pumping blood. Smooth muscle (C) is found in organs and blood vessels, responsible for involuntary movements. Voluntary muscle (D) is a general term that can refer to both skeletal and smooth muscles, but in this context, it does not specifically address moving the skeleton.

Correct Answer: B

Rationale: Sure, here's the step-by-step rationale for why choice B is the correct answer: 1. Qualitative research is subjective. 2. Scientific arguments should rely on objective, quantitative data. 3. Extensive use of qualitative research weakens objectivity. 4. Objective data strengthens scientific arguments. Summary of other choices: A: Lack of bias strengthens a scientific argument by ensuring objectivity. C: Reproducibility strengthens a scientific argument by validating results. D: Standing the test of time strengthens a scientific argument by showing consistency.

Correct Answer: B

Rationale: The correct answer is B: Movement of water across a selectively permeable membrane. Osmosis is the process where water molecules move from an area of higher water concentration to an area of lower water concentration through a selectively permeable membrane. This is driven by the concentration gradient of water molecules. Choice A is incorrect because osmosis does not involve movement against the concentration gradient. Choice C is incorrect as osmosis specifically refers to the movement of water molecules, not solutes. Choice D is incorrect as osmosis involves the movement of water molecules, not large molecules.