ATI TEAS Practice Science Test

Correct Answer: A

Rationale: The correct answer is A because the pharynx serves as a common passageway for both food and air. It allows food to pass from the mouth to the esophagus and air to pass from the nasal cavity to the larynx. It plays a crucial role in the process of swallowing and breathing. Choice B is incorrect because the warming and moistening of air during inhalation primarily occur in the nasal cavity and the respiratory tract, not the pharynx. Choice C is incorrect as the creation of a chest cavity at the base of the lungs is primarily the function of the diaphragm, not the pharynx. Choice D is incorrect as the structural support to the alveolar region is mainly provided by the alveoli themselves and surrounding tissues, not the pharynx.

Correct Answer: B

Rationale: The correct unit to measure how far a person can run in 30 minutes is kilometers. Kilometers are commonly used to measure shorter distances, making it suitable for this scenario. Gigameters, Megameters, and Terameters are all much larger units of distance measurement, which would not be appropriate for measuring the relatively small distance a person can run in 30 minutes. Kilometers offer a reasonable scale for measuring human running distances accurately within a small range.

Correct Answer: C

Rationale: The correct answer is C: Flexor. Flexor muscles are responsible for bending a joint by decreasing the angle between the bones they act upon. They contract to bring two body parts closer together. Cardiac muscles (A) are found in the heart and control its pumping action. Extension (B) refers to the straightening of a joint, not bending. Smooth muscles (D) are found in various organs and are not directly involved in joint movement. Therefore, the flexor muscle (C) is the correct choice for causing a joint to bend.

Correct Answer: A

Rationale: The correct answer is A: Adenine. Adenine forms a complementary base pair with cytosine through hydrogen bonding in DNA. This pairing is essential for maintaining the structure and stability of the DNA double helix. Adenine and cytosine form two hydrogen bonds between them. Choices B, C, and D are incorrect because cytosine does not bind with itself (B), guanine (C), or thymine (D) in DNA. Thymine pairs with adenine, while guanine pairs with cytosine. Therefore, the correct base that binds with cytosine is adenine.

Correct Answer: A

Rationale: The correct answer is A because the pharynx serves as a common passageway for both food and air. It allows food to pass from the mouth to the esophagus and air to pass from the nasal cavity to the larynx. It plays a crucial role in the process of swallowing and breathing. Choice B is incorrect because the warming and moistening of air during inhalation primarily occur in the nasal cavity and the respiratory tract, not the pharynx. Choice C is incorrect as the creation of a chest cavity at the base of the lungs is primarily the function of the diaphragm, not the pharynx. Choice D is incorrect as the structural support to the alveolar region is mainly provided by the alveoli themselves and surrounding tissues, not the pharynx.