ATI TEAS Practice Science Test

Correct Answer: C

Rationale: The correct answer is C: Shaft. The shaft is the portion of the hair that is visible above the skin's surface and is not attached to the follicle. The bulb (A) is the base of the hair follicle where the hair root (B) is located and is attached to the follicle. The strand (D) refers to the entire hair structure, including the bulb, root, and shaft. Therefore, the shaft is the only part that is not physically connected to the follicle.

Correct Answer: A

Rationale: The correct answer is A: Cranial and spinal. The dorsal cavity is divided into two subdivisions: the cranial cavity, which contains the brain, and the spinal cavity, which houses the spinal cord. This division corresponds to the anatomical locations of these structures within the back of the human body. Explanation: 1. The cranial cavity is located in the skull, specifically protecting the brain. 2. The spinal cavity runs through the vertebral column, safeguarding the spinal cord. 3. These subdivisions are anatomically and functionally distinct, housing vital components of the central nervous system. Summary: B: Dorsal and ventral - Incorrect. Dorsal and ventral refer to the front and back sides of the body, not specific cavities within the back. C: Lateral and proximal - Incorrect. Lateral and proximal describe directions in relation to the body, not cavities within the back. D: Inferior and superior - Incorrect. Inferior and superior

Correct Answer: D

Rationale: The correct answer is D because it specifically refers to the process of selective permeability by stating that sodium ions must travel through ion channels to enter the cell. This demonstrates that the cell membrane allows certain substances to pass through while blocking others. Receptors on the cell's surface (A) and cell communication (B) are related to cell function but do not directly confirm selective permeability. Environmental changes affecting cell size (C) are more about cell response than membrane permeability. In summary, choice D is correct because it directly addresses the concept of selective permeability, while the other choices do not provide direct evidence of this property.

Correct Answer: B

Rationale: The correct answer is B: Liver. The liver plays a crucial role in storing and metabolizing vitamins, releasing them as needed when intake decreases. It helps maintain vitamin levels in the body. The other choices are incorrect because the appendix has no role in vitamin absorption or regulation, the pancreas primarily aids in digestion and hormone regulation, and the stomach's main function is to break down food, not regulate vitamin levels.

Correct Answer: C

Rationale: Failed to generate a rationale after 5 retries.