An ice bag left on the body for longer than 20 minutes may cause

Correct Answer: A

Rationale: The correct answer is A because leaving an ice bag on the body for longer than 20 minutes can cause blood vessels to open due to a process called vasodilation. This occurs as a response to the cold temperature, which causes the blood vessels to dilate in an attempt to bring more warm blood to the area. This can lead to increased blood flow and potential tissue damage. Option B is incorrect as prolonged use of ice can actually slow down the clotting process and increase bleeding. Option C is incorrect as leaving an ice bag on the body does not cause fever. Option D is incorrect as prolonged application of ice can actually lead to increased swelling due to the increased blood flow to the area.

Correct Answer: D

Rationale: The correct answer is D: Left. The left cerebral hemisphere controls motor activity on the right side of the body due to the brain's contralateral organization. This means that the left hemisphere is responsible for controlling the opposite side of the body. The other choices are incorrect because the right hemisphere does not control the right side of the body (A), the middle hemisphere is not a recognized brain division (B), and the spinal cord is not directly involved in motor control originating from the brain (C).

Correct Answer: D

Rationale: The correct answer is D because hypothyroidism, a condition where the thyroid gland doesn't produce enough hormones, can lead to brittle hair and nails due to decreased metabolic activity affecting hair and nail growth. Increased hair growth (A) is associated with hyperthyroidism, not hypothyroidism. Weight loss (B) is a symptom of hyperthyroidism where metabolism is increased. Nausea or diarrhea (C) are not typical symptoms of hypothyroidism which usually presents with weight gain and constipation.

Correct Answer: D

Rationale: The correct answer is D: Hyperextended. When a joint is extended beyond its normal range of motion, it is considered hyperextended. This means that the joint is moved past its usual limit in the direction opposite to flexion. Flexion (choice A) is the bending of a joint, not extending it. Opposed (choice B) refers to two things being against each other and is not related to joint motion. Pronation (choice C) is the inward rotation of the forearm, not joint extension. Hyperextension is the only choice that accurately describes the scenario of a joint being extended beyond its normal motion limit.

Correct Answer: C

Rationale: The correct answer is C: Autopsy. An autopsy is a thorough examination of a body by a pathologist to determine the cause of death. Atrophy (A) refers to the wasting away of body tissues, not an examination. Anatomy (B) is the study of the structure of organisms, not specifically related to determining cause of death. Avulsion (D) is the tearing away of a body part, not related to postmortem examinations. Therefore, C is the correct answer as it directly relates to the process of determining cause of death through a detailed examination.