Science TEAS Practice Test

Correct Answer: A

Rationale: The correct answer is A: Tachycardia. Tachycardia is a condition where the heart rate is abnormally fast, typically above 100 bpm. In this case, with a heart rate of 118 bpm, it falls under tachycardia. Explanation: 1. Tachycardia refers to an elevated heart rate, which is present in this scenario. 2. Apnea is the absence of breathing, not related to heart rate. 3. Bradycardia is a condition where the heart rate is too slow, typically below 60 bpm. 4. Tachypnea is rapid breathing, not related to heart rate. In summary, tachycardia is the correct term for a heart rate of 118 bpm, making the other options incorrect due to their associations with different physiological functions.

Correct Answer: C

Rationale: The correct answer is C: The rectum. The genitourinary system consists of organs involved in reproduction and waste elimination. The rectum is part of the digestive system, not the genitourinary system. The kidneys (A), urethra (B), and bladder (D) are all essential components directly involved in the production, storage, and elimination of urine. The rectum plays a role in the elimination of solid waste and is not part of the genitourinary system.

Correct Answer: B

Rationale: The correct answer is B: Secondary structure. Secondary structure refers to the local folding patterns of the polypeptide backbone, mainly involving alpha helices and beta sheets. This level of protein structure is determined by hydrogen bonding between amino acids along the backbone. Primary structure (A) is the linear sequence of amino acids, tertiary structure (C) refers to the overall 3D shape of a protein, and quaternary structure (D) involves the arrangement of multiple protein subunits. In this case, the question specifically asks about the folds and coils of the polypeptide backbone, which align with the characteristics of secondary structure.

Correct Answer: B

Rationale: The correct answer is B: A model. A model is a representation of a natural pattern or occurrence that simplifies complex systems to make them easier to understand and study. Models can simulate natural phenomena that are difficult or impossible to experience directly, allowing scientists to make predictions and test hypotheses. The other choices are incorrect because: A: A theory is an explanation based on evidence and reasoning, not necessarily something difficult to experience directly. C: A law describes a recurring phenomenon but may not involve a representation or simulation of the phenomenon. D: An observation is a direct act of seeing or noting something, not a representation of a complex natural pattern.

Correct Answer: C

Rationale: The correct answer is C: Epidermis. The epidermis is the outermost layer of the skin and is avascular, meaning it does not contain blood vessels. This is important for maintaining its protective function and preventing blood loss in case of injury. The hypodermis (A) contains blood vessels that supply the skin with nutrients and regulate temperature. The dermis (B) is rich in blood vessels, providing nourishment to the skin and regulating temperature. Option D (Hyperdermis) is not a recognized layer of the skin, making it an incorrect choice.