TEAS Practice Test Science

Correct Answer: D

Rationale: The correct answer is D: Vacuole. Vacuoles are responsible for storing food, water, and other materials in the cell. They help maintain turgor pressure and regulate the cell's internal environment. Centrioles are involved in cell division, lysosomes contain digestive enzymes, and ribosomes are responsible for protein synthesis. So, A, B, and C are incorrect choices for food and water storage in the cell.

Correct Answer: D

Rationale: Rationale: 1. Choice A is correct as the left ventricle pumps oxygen-rich blood into the aorta. 2. Choice B is correct as the right ventricle pumps deoxygenated blood into the pulmonary trunk. 3. Choice C is correct as ventricles are indeed the main pumping chambers of the heart. 4. Therefore, choice D, "All of the above," is correct as it encompasses all true statements about the ventricles. Other choices are incorrect as they do not cover all accurate statements.

Correct Answer: D

Rationale: When blood sugar drops, the body needs to increase glucose levels. The correct answer, D, is that the pancreas releases glucagon. Glucagon signals the liver to break down stored glycogen into glucose, raising blood sugar levels. This is a crucial mechanism to maintain blood glucose homeostasis. Other choices (A, B, C) are incorrect as they do not address the specific response needed to increase blood sugar levels when it drops.

Correct Answer: B

Rationale: The correct answer is B: Occipital lobe. The occipital lobe is primarily responsible for processing visual information. It contains the primary visual cortex which helps in interpreting visual stimuli. The frontal lobe (A) is responsible for executive functions, the parietal lobe (C) for processing sensory information, and the temporal lobe (D) for auditory processing and memory. Therefore, the occipital lobe is the correct choice for vision processing.

Correct Answer: C

Rationale: The correct answer is C: Lactic acid and CO2. During anaerobic respiration in humans, glucose is broken down into lactic acid and a small amount of CO2. This process occurs in the absence of oxygen, typically during high-intensity exercise when oxygen supply is limited. Lactic acid buildup causes muscle fatigue. Explanation for why other choices are incorrect: A: Ethyl alcohol and CO2 - This is the byproduct of fermentation in yeast, not human anaerobic respiration. B: Ethyl alcohol only - Ethyl alcohol is not produced during human anaerobic respiration. D: Lactic acid only - While lactic acid is indeed produced during anaerobic respiration in humans, a small amount of CO2 is also generated as a byproduct.