Practice TEAS Science Test

Correct Answer: A

Rationale: The correct answer is A: Amygdala. The amygdala is responsible for processing emotions, emotional behavior, and motivation. It plays a crucial role in fear and pleasure responses. It also helps in memory consolidation of emotional events. The other choices, B: Cerebellum, C: Hypothalamus, and D: Pons, do not primarily govern emotions and motivation. The cerebellum is mainly involved in motor control, the hypothalamus regulates basic functions like hunger and thirst, and the pons controls sleep and arousal. Therefore, the amygdala is the correct answer for its specific role in emotions and motivation.

Correct Answer: B

Rationale: The correct answer is B (2 ATP molecules produced per FADH2 molecule) in aerobic respiration. FADH2 enters the electron transport chain at a later stage compared to NADH, leading to the production of 2 ATP through oxidative phosphorylation. FADH2 donates electrons to Complex II, bypassing Complex I, resulting in a lower energy yield compared to NADH which donates electrons to Complex I. Choice A (1 ATP) is incorrect as FADH2 produces more ATP than that. Choice C (3 ATP) is incorrect as FADH2 produces 2 ATP, not 3. Choice D (4 ATP) is incorrect as FADH2 produces 2 ATP, not 4.

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: C

Rationale: The correct answer is C: Graduated cylinder. To measure the volume of a solid accurately, we need to use a container with volume markings like a graduated cylinder. Step 1: Fill the graduated cylinder with a known amount of water. Step 2: Drop the solid into the water and measure the new water level. Step 3: Subtract the initial water level from the final level to find the volume displaced, which is the volume of the solid. The other choices are incorrect because a triple beam balance measures mass, a measuring wheel is for linear measurements, and using a measuring wheel and formula may not provide accurate volume measurements.

Correct Answer: B

Rationale: The correct answer is B: To filter waste from the blood. The kidneys are responsible for filtering waste products and excess fluids from the bloodstream to form urine. This process helps maintain the body's overall balance of fluids and electrolytes. Regulating body temperature is primarily controlled by the skin and sweat glands, not the kidneys (choice A). While the kidneys do produce hormones like erythropoietin and renin, their primary function is waste filtration, not hormone production (choice C). Transporting oxygen is primarily the role of the respiratory and circulatory systems, not the kidneys (choice D).