TEAS Practice Test Science

Correct Answer: C

Rationale: The correct answer is C: molarity. Molarity is a concentration unit that depends on pressure because it is defined as the number of moles of solute dissolved in one liter of solution. Pressure can affect the volume of the solution, thus impacting the molarity. A: ppm (parts per million) and B: ppb (parts per billion) are mass-based concentration units and do not directly depend on pressure. D is incorrect because while molarity does depend on pressure, ppm and ppb do not.

Correct Answer: B

Rationale: The correct answer is B: White blood cells. White blood cells, specifically B lymphocytes, are responsible for producing antibodies. B lymphocytes recognize foreign substances (antigens) and produce antibodies to neutralize them. Red blood cells (choice A) are involved in oxygen transport, platelets (choice C) are responsible for blood clotting, and plasma (choice D) is the liquid component of blood that carries nutrients and waste products. Thus, white blood cells are the only cells among the choices directly involved in antibody production.

Correct Answer: C

Rationale: The correct answer is C: The bladder. The bladder is located in the pelvic cavity, specifically in the lower part of the abdomen. It is a hollow organ that stores urine before it is expelled from the body. The kidneys (A) are located in the upper abdominal area, the colon (B) is part of the large intestine and extends from the cecum to the rectum, and the rectum (D) is the final part of the large intestine before the anus. Therefore, the bladder is the only structure among the choices that is specifically located in the pelvic cavity.

Correct Answer: C

Rationale: The correct answer is C: molarity. Molarity is a concentration unit that depends on pressure because it is defined as the number of moles of solute dissolved in one liter of solution. Pressure can affect the volume of the solution, thus impacting the molarity. A: ppm (parts per million) and B: ppb (parts per billion) are mass-based concentration units and do not directly depend on pressure. D is incorrect because while molarity does depend on pressure, ppm and ppb do not.

Correct Answer: B

Rationale: The correct answer is B: To produce bile. The liver produces bile, which is essential for the digestion and absorption of fats in the small intestine. Bile helps emulsify fats, breaking them down into smaller droplets for easier digestion. A: To absorb water - This is not the primary function of the liver. Water absorption primarily occurs in the intestines. C: To store glucose - While the liver does store glucose in the form of glycogen, its primary function is not to store glucose. D: To regulate metabolism - While the liver does play a role in metabolism, its primary function in the digestive system is to produce bile.