ATI TEAS 7
ATI TEAS 7 Version 1 Science Questions
Extract:
Question 1 of 5
Which of the following properties of water explains its solvent abilities for certain substances?
Correct Answer: B
Rationale: The correct answer is B: Polarity. Water's polarity, resulting from its unequal sharing of electrons and the formation of hydrogen bonds, makes it an excellent solvent. The polar nature of water allows it to interact with and dissolve substances that have charges or partial charges, aiding in their breakdown at a molecular level. Choices A, C, and D are not directly associated with water's solvent capabilities. High specific heat (Choice A) refers to water's ability to resist temperature changes, volume (Choice C) is the amount of space occupied by water, and high surface tension (Choice D) pertains to water's cohesive properties.
Extract:
Question 2 of 5
Which of the following properties of water explains its solvent abilities for certain substances?
Correct Answer: B
Rationale: The correct answer is B: Polarity. Water's polarity, resulting from its unequal sharing of electrons and the formation of hydrogen bonds, makes it an excellent solvent. The polar nature of water allows it to interact with and dissolve substances that have charges or partial charges, aiding in their breakdown at a molecular level. Choices A, C, and D are not directly associated with water's solvent capabilities. High specific heat (Choice A) refers to water's ability to resist temperature changes, volume (Choice C) is the amount of space occupied by water, and high surface tension (Choice D) pertains to water's cohesive properties.
Question 3 of 5
Which of the following synthesizes antidiuretic hormone?
Correct Answer: C
Rationale: The correct answer is C: Hypothalamus. The hypothalamus, located in the brain, synthesizes antidiuretic hormone (ADH), also known as vasopressin. ADH is crucial in regulating water balance by controlling the reabsorption of water in the kidneys. This action reduces urine production, helping to maintain proper fluid levels in the body and prevent dehydration. While the pancreas, thymus, and pineal gland play important roles in the endocrine system, they are not responsible for synthesizing antidiuretic hormone.
Extract:
Question 4 of 5
Which of the following spinal regions contains the largest number of vertebrae?
Correct Answer: A
Rationale: The thoracic region contains 12 vertebrae, which is more than the 5 lumbar, 7 cervical, and 5 sacral vertebrae.
Extract:
Question 5 of 5
In a hypertonic solution, water flows through aquaporins embedded in the plasma membrane of the cell. This type of transport is best known as which of the following?
Correct Answer: C
Rationale: In a hypertonic solution, water moves out of the cell through aquaporins due to the higher solute concentration outside the cell. This process is known as osmosis, which involves the movement of water across a selectively permeable membrane from an area of low solute concentration to an area of high solute concentration. Osmosis is a passive process, meaning it does not require energy input. Active transport, on the other hand, requires energy to move substances across a membrane. Diffusion is the movement of molecules from an area of high concentration to low concentration without the involvement of aquaporins. Facilitated diffusion, while also passive, requires specific carrier proteins for transport but does not involve the movement of water as seen in osmosis.