A weakening of the heart muscle due to enlargement is ___________.

Correct Answer: D

Rationale: The correct answer is D: Cardiomyopathy. Cardiomyopathy is a condition characterized by weakening of the heart muscle due to enlargement. This weakening impairs the heart's ability to pump blood effectively. A: Coronary artery disease involves blocked heart arteries, not weakening of the heart muscle. B: Angina pectoris is chest pain due to reduced blood flow to the heart muscle, not weakening of the heart muscle. C: Myocardial ischemia refers to reduced blood flow to the heart muscle, not the weakening and enlargement of the heart muscle seen in cardiomyopathy.

Correct Answer: C

Rationale: The correct answer is C: Blurred vision. The first symptom of a cataract is typically blurred vision, as the clouding of the lens causes light to scatter, leading to fuzzy or unclear vision. Reduced side vision (A) is not typically the first symptom, vomiting (B) is not associated with cataracts, and double vision (D) is more commonly linked to other eye conditions. Blurred vision is the hallmark initial symptom of cataracts due to the gradual clouding of the lens.

Correct Answer: D

Rationale: Immunotherapy is the correct answer because it uses antibodies or vaccines to boost the body's immune system to target and destroy cancer cells. It specifically targets malignant tumors without harming normal cells. Radiation therapy (A) uses high-energy rays to kill cancer cells, hormone therapy (B) blocks hormones that cancer cells need to grow, and chemotherapy (C) uses drugs to kill rapidly dividing cells, including cancer cells. However, only immunotherapy directly harnesses the immune system to fight cancer cells.

Correct Answer: D

Rationale: The correct answer is D (6). Performing range of motion exercises at least 6 times for each joint helps maintain joint flexibility and prevent stiffness. This number strikes a balance between providing sufficient stimulation for improvement and avoiding overexertion. Choice A (9) may be excessive and could lead to fatigue or strain. Choices B (5) and C (3) may not provide enough repetitions to effectively improve joint mobility. Therefore, option D is the most appropriate for promoting optimal joint health.

Correct Answer: C

Rationale: The correct answer is C, Terminal illness. Terminal illness refers to a condition that will ultimately lead to death. This term is specifically used to describe an illness with no possibility of a cure or recovery. Marginal illness (A) refers to a minor or insignificant health issue. Palliative illness (B) refers to a condition in which the goal is to provide relief from symptoms but not necessarily cure it. Complicated illness (D) refers to a condition that is complex in nature but does not imply a fatal outcome. Therefore, Terminal illness is the most appropriate term to describe an illness that will inevitably result in death.