ATI TEAS 7
ATI TEAS Science Questions
1. Which part of the ear is responsible for transmitting sound vibrations to the inner ear?
- A. Cochlea
- B. Ossicles
- C. Semicircular canals
- D. Eustachian tube
Correct answer: B
Rationale: The correct answer is B: Ossicles. The ossicles, consisting of the malleus, incus, and stapes, are located in the middle ear. They play a crucial role in transmitting sound vibrations from the eardrum to the inner ear, specifically to the cochlea. The cochlea is responsible for converting sound vibrations into electrical signals for the brain to interpret. The semicircular canals are not involved in transmitting sound but are responsible for balance and orientation. The eustachian tube's function is to help equalize pressure in the middle ear, not to transmit sound vibrations.
2. What is a benefit of a taxonomic system?
- A. Researchers can describe how living things behave.
- B. Researchers can develop names for new organisms.
- C. Living things can be distinguished from nonliving things.
- D. Living things can be classified based on their molecular traits.
Correct answer: D
Rationale: The correct answer is D. A taxonomic system allows scientists to classify living organisms based on their molecular and genetic traits. This classification helps in understanding the relationships and evolutionary history of different organisms, providing insights into their characteristics and behaviors. Choices A, B, and C do not directly relate to the primary purpose and benefit of a taxonomic system, which is the systematic classification of organisms.
3. What is the main component that gives bones their rigidity and hardness?
- A. Collagen
- B. Calcium phosphate
- C. Cartilage
- D. Ligaments
Correct answer: B
Rationale: Calcium phosphate is the main component that gives bones their rigidity and hardness. It combines with calcium hydroxide to form hydroxyapatite crystals, which provide strength and structure to bones. Collagen, on the other hand, provides flexibility and tensile strength. Cartilage is a type of connective tissue found in joints, and ligaments are fibrous tissues that connect bones to other bones, but they do not contribute to the rigidity and hardness of bones.
4. Why do emerging infectious diseases (EIDs) pose a significant public health threat?
- A. Because they are well-understood by medical professionals
- B. Because they are easily treatable with existing antibiotics
- C. Because they are new, rapidly evolving, and can spread quickly
- D. Because they primarily affect animals and not humans
Correct answer: C
Rationale: Emerging infectious diseases (EIDs) are a significant public health threat because they are characterized by being new or newly identified diseases that are rapidly evolving. These diseases can spread quickly within populations due to factors such as globalization, travel, urbanization, and changes in climate. EIDs often present challenges to medical professionals as they may not be well-understood initially, making it difficult to develop effective treatments or preventive measures. While some EIDs can be treatable with existing antibiotics, the rapid evolution of these diseases can lead to the development of drug resistance, further complicating treatment efforts. Additionally, EIDs are not limited to affecting animals; they can also have serious implications for human health and well-being. Therefore, the correct answer is that EIDs pose a threat because they are new, rapidly evolving, and can spread quickly. Choices A, B, and D are incorrect because EIDs are not well-understood initially, may develop drug resistance, and can affect humans significantly, not just animals.
5. What term describes the point where parallel rays of light converge or appear to diverge after passing through a lens or reflecting off a mirror?
- A. Aperture
- B. Focal length
- C. Refractive index
- D. Lens thickness
Correct answer: B
Rationale: The correct answer is 'Focal length.' Focal length is the term used to describe the point where parallel rays of light converge or appear to diverge after passing through a lens or reflecting off a mirror. It is a critical parameter in optics that determines the magnification and image formation in optical systems. Aperture refers to the opening through which light enters a camera or telescope, not the convergence point of light rays. Refractive index is a measure of how much light is bent, not the point where rays converge. Lens thickness is the physical dimension of a lens and does not indicate the convergence point of light rays. Therefore, 'Focal length' is the most appropriate choice in this context.
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