In embryonic period, formation of all of the following occur by the given time EXCEPT

Correct Answer: D

Rationale: Endoderm formation occurs much earlier than 10 weeks in the embryonic period.

Correct Answer: A

Rationale: Impetigo contagiosa typically does not leave scarring once it has subsided and healed. This skin infection primarily affects the superficial layers of the skin and does not cause damage deep enough to result in scarring. While there may be some temporary pigmented spots or mild changes in skin color after the infection resolves, scarring is not a common outcome of impetigo contagiosa in most cases. Thus, the nurse should reassure the parents that their child's skin is not likely to have any scarring after the infection has healed.

Correct Answer: A

Rationale: Drinking acidic juices, such as cranberry juice, can help make the urine more acidic, which can potentially prevent bacteria from sticking to the urinary tract walls and reduce the risk of urinary tract infections. It is important to note that while acidic juices can be beneficial in some cases, they should not be relied upon as the sole preventive measure for UTIs. Other important preventive measures include staying hydrated, practicing good hygiene, and urinating before and after intercourse.

Correct Answer: B

Rationale: Uremic frost is a term used to describe the presence of urea crystals on the skin of individuals with chronic renal failure. As kidney function declines in chronic renal failure, the body is unable to effectively excrete waste products such as urea. Urea can then be deposited on the skin when sweating, leading to the formation of white or frost-like crystals, giving the appearance of "uremic frost." This condition is a visible indicator of severe kidney dysfunction and the buildup of waste products in the body.

Correct Answer: A

Rationale: Complete resection with microscopic residual disease typically warrants adjuvant chemotherapy.