ati teas 7 science

Correct Answer: C

Rationale: The correct answer is C: Adrenal gland. The adrenal gland is located on top of the kidneys and consists of the adrenal cortex and adrenal medulla. The adrenal cortex produces hormones such as aldosterone, which helps regulate blood pressure by controlling sodium and potassium levels. It also produces cortisol, which helps regulate metabolism and immune response. The adrenal medulla produces adrenaline, which helps the body respond to stress. A: The thyroid gland is responsible for regulating metabolism and hormone production, not blood pressure or electrolyte balance. B: The pituitary gland regulates various hormones and functions but is not directly responsible for blood pressure or electrolyte balance. D: The parathyroid gland regulates calcium levels in the blood and bones, not blood pressure or electrolyte balance.

Correct Answer: C

Rationale: The correct answer is C: Vitamin K. Vitamin K is essential for blood clotting as it helps in the synthesis of clotting factors. Without adequate vitamin K, the blood cannot clot properly, leading to excessive bleeding. Vitamin A (Choice A) is crucial for vision and immune function, not blood clotting. Vitamin C (Choice B) is important for collagen synthesis and immune function, not blood clotting. Vitamin D (Choice D) is essential for bone health and immune function, not blood clotting. Thus, the correct choice is Vitamin K as it plays a direct role in the blood clotting process.

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: B

Rationale: The correct answer is B because it demonstrates a single displacement reaction where zinc (Zn) displaces hydrogen (H) in hydrochloric acid (HCl) to form zinc chloride (ZnCl2) and hydrogen gas (H2). This is evident from the activity series where Zn is more reactive than H. A, C, and D are not examples of single displacement reactions. A represents a synthesis reaction where hydrogen and oxygen combine to form water. C represents a decomposition reaction where calcium carbonate breaks down into calcium oxide and carbon dioxide. D represents a combustion reaction where methane reacts with oxygen to form carbon dioxide and water.

Correct Answer: B

Rationale: The correct answer is B: Bronchitis. Bronchitis is the inflammation of the bronchi, leading to symptoms like cough and mucus production. Pneumonia (A) is an infection in the lungs, not specifically inflammation of the bronchi. Emphysema (C) is a chronic lung condition characterized by damaged air sacs in the lungs, not bronchial inflammation. Pleurisy (D) is inflammation of the lining of the lungs, not the bronchi. Therefore, based on the symptoms described, bronchitis is the most suitable term for inflammation of the bronchi.