ati teas 7 science

Correct Answer: C

Rationale: The correct answer is C because the main function of the pancreas is to produce enzymes that help digest food. These enzymes are released into the small intestine to break down carbohydrates, proteins, and fats. Choice A is incorrect as the pancreas does not store or break down food. Choice B is incorrect as nutrient absorption primarily occurs in the small intestine, not the pancreas. Choice D is incorrect as regulating blood sugar levels is primarily the role of the endocrine portion of the pancreas, not its main function.

Correct Answer: B

Rationale: The correct answer is B: Ammonia (NH₃). Ammonia is a common base found in household products due to its ability to accept protons and increase the pH of solutions. It is commonly used in cleaning products such as glass cleaners and floor cleaners. A: Sodium chloride (NaCl) is a salt and not a base. C: Vinegar is acidic due to the presence of acetic acid. D: Lemon juice is also acidic due to the presence of citric acid. Therefore, B is the correct answer as it is a common base found in household products, while the other choices are either salts or acidic substances.

Correct Answer: C

Rationale: Rationale: Cytosol is the liquid component of the cytoplasm and is not membrane-bound. Mitochondrion is a membrane-bound organelle responsible for energy production. Therefore, the difference between cytosol and mitochondrion is that the mitochondrion is a membrane-bound organelle, while cytosol is not. Summary: A: Incorrect. Cytosol is not a membrane-bound organelle, and the mitochondrion is also not membrane-bound. B: Incorrect. Cytosol is part of the cytoplasm, and the mitochondrion is also located within the cytoplasm. C: Correct. The mitochondrion is a membrane-bound organelle, while cytosol is not. D: Incorrect. Both the mitochondrion and cytosol are components of the cytoplasm, but the mitochondrion is membrane-bound, unlike cytosol.

Correct Answer: A

Rationale: The P wave on an ECG represents atrial depolarization. During the cardiac cycle, the electrical impulse originates in the sinoatrial (SA) node, causing the atria to contract. This depolarization of the atria is reflected as the P wave on the ECG. This occurs before the ventricles depolarize (choice B), repolarize (choice D), or before the atria repolarize (choice C). Therefore, the correct answer is A because the P wave specifically represents atrial depolarization in the cardiac cycle.

Correct Answer: B

Rationale: Failed to generate a rationale after 5 retries.