Practice TEAS Science Test

Correct Answer: C

Rationale: The correct answer is C because not all macromolecules contain phosphorus. Macromolecules such as proteins, carbohydrates, and lipids contain carbon, hydrogen, and oxygen but not necessarily phosphorus. Proteins and carbohydrates can exist as single chains or be branched, so choices A and B are not characteristics that exclude a macromolecule. Choice D is also incorrect because not all macromolecules are used by the body, as some like cellulose are not digestible by humans.

Correct Answer: D

Rationale: The correct answer is D: To regulate blood glucose. The adrenal glands secrete hormones like cortisol and adrenaline, which play a crucial role in regulating blood glucose levels. Cortisol helps increase blood glucose when needed, while adrenaline helps release stored glucose for energy in fight-or-flight situations. Choices A, B, and C are incorrect. A is more related to the thyroid gland, B is produced by the liver, and C is primarily done by the bone marrow.

Correct Answer: B

Rationale: The correct answer is B: Measuring wheel and mathematical formula. To measure the volume of a cube, you need to measure the length of one side using a measuring wheel and then use the formula V = s^3, where V is the volume and s is the length of one side. This method is suitable because it directly measures the side length of the cube, which is essential for calculating the volume accurately. Choice A, the triple beam balance, is used for measuring mass, not volume. Choice C, the graduated cylinder, is used to measure the volume of irregularly shaped objects using water displacement method, not ideal for a cube. Choice D, the measuring wheel alone, does not provide the formula for calculating the volume of a cube, making it less suitable compared to choice B.

Correct Answer: B

Rationale: The correct answer is B: To absorb water and form feces. The large intestine mainly functions to absorb water from the indigestible food residue and solidify it into feces before excretion. This process helps in maintaining the body's fluid balance and preventing dehydration. Why the other choices are incorrect: A: The absorption of proteins primarily occurs in the small intestine, not the large intestine. C: Enzymes for digestion are produced in the pancreas and small intestine, not in the large intestine. D: Fat storage is mainly regulated by adipose tissue throughout the body, not the large intestine.

Correct Answer: D

Rationale: The correct answer is D: Pia mater. Pia mater is the innermost meningeal layer that is a thin membrane containing nerves and blood vessels. It directly covers the brain and spinal cord, supplying nourishment to the underlying cells. Arachnoid mater (A) is the middle meningeal layer that does not contain nerves and blood vessels. Dura mater (B) is the tough outermost layer that does not supply nourishment. Periosteum (C) is a connective tissue covering bones, not the meninges.