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 the ovum, once released during ovulation, has a lifespan of approximately 24 hours. Sperm can survive in the female reproductive tract for up to 5 days, but if fertilization does not occur within 36 to 48 hours after ovulation, the ovum will degenerate and not be viable for fertilization. Choices A, B, and D are incorrect because they do not align with the known lifespan of the ovum and the window of fertilization opportunity.

Correct Answer: C

Rationale: The correct answer is C: Phantom sensation. Phantom sensation refers to the warmth, itching, or tingling felt in a body part that has been amputated. This phenomenon occurs due to the brain still receiving signals from the nerves that used to be connected to the now missing body part. Osteoporosis (A) is a condition characterized by weakening of bones, not related to sensations in amputated limbs. Bursitis (B) is inflammation of the bursae, not associated with phantom sensations. Osteoarthritis (D) is a degenerative joint disease, not related to sensations in amputated limbs.

Correct Answer: C

Rationale: The correct answer is C: Hormones. Hormones are chemical substances produced by the body's endocrine glands that regulate various physiological functions. They act as messengers, controlling processes such as metabolism, growth, and reproduction. Nutrients (A), Minerals (B), and Vitamins (D) are essential for the body but do not regulate bodily functions in the same way as hormones do. Nutrients provide energy and building blocks for the body, minerals are important for various bodily functions, and vitamins play crucial roles in metabolism and overall health. However, hormones specifically serve as signaling molecules that coordinate and control the activities of different organs and systems in 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 bacterial infection, not an autoimmune disease. Rheumatoid arthritis fits the criteria of an autoimmune disease as it involves the immune system attacking the body's own tissues.

Correct Answer: B

Rationale: The correct answer is B: Gastric suctioning. Gastric suctioning involves removing toxins from the stomach by inserting a tube through the nose or mouth. This method is effective in removing ingested poisons before they are absorbed into the bloodstream. Bladder suctioning (A), endotracheal suctioning (C), and intravenous suctioning (D) are not appropriate methods for removing toxins from the body. Bladder suctioning is for draining urine, endotracheal suctioning is for clearing secretions from the airway, and intravenous suctioning does not exist as a valid medical procedure.