ATI TEAS Practice Test Science

Correct Answer: B

Rationale: The corrected question and choices are accurate. The correct answer is the Occipital lobe. The occipital lobe, located at the back of the brain, is primarily responsible for processing visual information received from the eyes. It plays a crucial role in interpreting and making sense of visual stimuli, allowing us to perceive and understand the world around us. The other choices, cerebrum (A), frontal lobe (C), and brainstem (D), do not have the primary function of processing visual information. The cerebrum is involved in higher brain functions, the frontal lobe is responsible for decision-making and personality, and the brainstem controls basic life functions like breathing and heart rate.

Correct Answer: B

Rationale: The correct answer is B: 'To break down proteins.' The primary function of the stomach in the digestive system is to break down proteins using gastric acid and enzymes. The stomach's acidic environment aids in protein digestion and prepares food for further processing in the small intestine. Choice A is incorrect because nutrient absorption primarily occurs in the small intestine, not the stomach. Choice C is incorrect because the stomach actually produces stomach acid to aid in digestion, not to neutralize it. Choice D is incorrect because regulating body temperature is not a primary function of the stomach within the digestive system.

Correct Answer: B

Rationale: The correct answer is B: Mitochondria. Mitochondria are known as the powerhouses of the cell and are responsible for producing energy in the form of ATP through cellular respiration. ATP is the primary energy currency of the cell, powering various cellular activities. The nucleus (choice A) is responsible for housing the cell's genetic material but is not involved in ATP production. Ribosomes (choice C) are involved in protein synthesis, not energy production. The Golgi apparatus (choice D) is responsible for modifying, sorting, and packaging proteins for secretion, not for ATP production.

Correct Answer: B

Rationale: The correct answer is the Liver. The liver is the organ responsible for detoxifying harmful substances in the body. It accomplishes this by metabolizing drugs and filtering blood. The liver plays a crucial role in maintaining overall health by processing and eliminating toxins. Choices A, C, and D are incorrect. The kidneys primarily filter blood to remove waste and excess substances, the heart is responsible for pumping blood throughout the body, and the pancreas aids in digestion and regulating blood sugar levels, but none of these organs are primarily responsible for detoxification.

Correct Answer: B

Rationale: Mitochondria are the powerhouse of the cell and are responsible for producing ATP through cellular respiration. ATP, or adenosine triphosphate, is the energy currency of the cell that is essential for various cellular processes. The Golgi apparatus is involved in modifying, sorting, and packaging proteins for secretion. The nucleus is responsible for housing the cell's genetic material and controlling cell activities. Ribosomes are involved in protein synthesis. However, the actual production of ATP occurs in the mitochondria through processes like the citric acid cycle and oxidative phosphorylation.