An ovum will die if it is not fertilized by a sperm within

Correct Answer: C

Rationale: The correct answer is C (36 to 48 hours) because an ovum typically remains viable for up to 24 hours after ovulation, and sperm can survive in the female reproductive tract for up to 5 days. Therefore, the window for fertilization is around 36 to 48 hours after ovulation. Choice A (2 to 4 hours) is too short for the sperm to reach the ovum and fertilize it. Choice B (10 to 12 hours) is also too short considering the lifespan of both the ovum and sperm. Choice D (24 to 48 hours) is too broad and does not account for the optimal timing for fertilization.

Correct Answer: C

Rationale: The correct answer is C: Phantom sensation. This refers to the perception of warmth, itching, or tingling in a body part that has been amputated. It is a common phenomenon experienced by individuals who have undergone amputations. The other choices, A (Osteoporosis), B (Bursitis), and D (Osteoarthritis), are unrelated to the sensation experienced in an amputated body part. Osteoporosis is a condition characterized by weakening of bones, bursitis is inflammation of the bursae, and osteoarthritis is a degenerative joint disease. Therefore, only phantom sensation accurately describes the warmth, itching, or tingling experienced in an amputated body part.

Correct Answer: C

Rationale: The correct answer is C: Hormones. Hormones are chemical substances produced by the body's endocrine system that regulate various bodily functions. They act as messengers, controlling processes like metabolism, growth, and reproduction. Nutrients (A) are substances essential for growth and health, but they are not created by the body. Minerals (B) are inorganic substances vital for bodily functions, but they are not created by the body either. Vitamins (D) are organic compounds necessary for various bodily processes, but they are also not produced by the body.

Correct Answer: B

Rationale: The correct answer is B: Rheumatoid arthritis. This is an autoimmune disease where the immune system mistakenly attacks the joints, leading to inflammation and joint damage. Hypothyroidism (choice A) is a thyroid disorder, not an autoimmune disease. Hepatitis (choice C) is a viral infection affecting the liver. Gonorrhea (choice D) is a sexually transmitted infection caused by bacteria. Rheumatoid arthritis is the only option that fits the criteria of an autoimmune disease where the immune system targets the body's own tissues.

Correct Answer: B

Rationale: The correct answer is B: Gastric suctioning. This process involves removing poisons from the stomach by inserting a tube through the nose or mouth. It is effective because it directly targets the source of poisoning. Bladder suctioning (A) is unrelated to removing poisons from the body. Endotracheal suctioning (C) is used to clear secretions from the airway, not to remove poisons. Intravenous suctioning (D) is not a valid medical procedure; intravenous lines are used for administering fluids and medications, not for suctioning.