(A) Placing the infant on her abdomen may allow for injury to the suture line. (B) Elbow restraints prevent the infant from touching the suture line and yet leaves hands free. (C) The suture line is cleaned as often as every hour to prevent crusting and scarring. (D) Sucking of a bottle or pacifier places pressure on the suture line and may delay healing and cause scarring.

Explanation
(A) Duplication of genetic material occurs during the preembryonic period (weeks 1-3) following conception.
The exact duplication of genetic material is essential for cell differentiation, growth, and biological maintenance of the organism. (B) Weeks 4-8, known as the embryonic period, are the time organogenesis occurs and pose the greatest potential for major congenital malformations. All major internal and external organs and systems are formed. (C) Subcutaneous fat does not develop until the latter weeks of gestation. (D) Kidneys begin to secrete urine during the 13th-16th week.

Explanation
(A) Diabetes mellitus is not a common complication of myocardial infarction. (B) Anaphylactic shock is an allergic reaction. (C) Cardiac hypertrophy is a late potential complication. It is a common complication of congestive heart failure. (D) Myocardial infarction causes tissue damage, which may interrupt electrical impulses. Myocardial irritability results from lack of oxygenated tissue.

Explanation
(A) Vitamin C (ascorbic acid) is essential in promoting wound healing and collagen formation. (B) Vitamin B1 (thiamine) maintains normal gastrointestinal (GI) functioning, oxidizes carbohydrates, and is essential for normal functioning of nervous tissue. (C) Vitamin D regulates absorption of calcium and phosphorus from the GI tract and helps prevent rickets. (D) Vitamin A is necessary for the formation and maintenance of skin and mucous membranes. It is also essential for normal growth and development of bones and teeth.

(A) Although the client is having command hallucinations, this is second in priority to real or potential violence, which can be a threat to life itself. (B) Although the client is experiencing delusions, this is also a lower priority than his potential or actual loss of control. (C) Whether real or potential, violence directed at self or others is always high priority. (D) There is no evidence of loosening of associations.