(A)
LOA identifies a fetus whose back is on its mother's left side, whose head is the presenting part, and whose back is toward its mother's anterior. It is easiest to auscultate fetal heart tones (FHTs) through the fetus's back. (B) The identified fetus's back is on its mother's left side, not right side. It is easiest to auscultate FHTs through the fetus's back.
(C)
In an LOA position, the fetus's head is presenting with the back to the left anterior side
of the mother. The umbilicus is too high of a landmark for auscultating the fetus's heart rate through its back. (D) This is the correct auscultation point for a fetus in the left sacroanterior position, where the sacrum is presenting, not LOA.

Explanation/Reference:
Explanation:
(A) Thrombolytic agents (e.g., streptokinase) directly activate plasminogen, dissolving fibrin deposits, which in turn dissolves clots that have already formed. (B) Heparin prevents the formation of clots by potentiating the effects of antithrombin III and the conversion of prothrombin to thrombin. (C) Warfarin prevents the formation of clots by interfering with the hepatic synthesis of the vitamin K-dependent clotting factors. (D) Platelets initiate the coagulation of blood by adhering to each other and the site of injury to form platelet plugs.

Section: Questions Set F
Explanation:
(A) Aging is a factor in the cause of degenerative disorders. (B) Double-bind messages may be found in the histories of families of individuals who develop schizophrenia, but they are not related to degenerative disorders. (C) Chemicals (toxic agents) in work environments are predisposing factors to degenerative disorders. (D) Alcohol causes some degenerative disorders, such as Wernicke's syndrome.

(A, B, C) The individual's systolic and diastolic changes are more significant than the relatively high initial blood pressure readings. (D) The systolic pressure went up 12 mm Hg and the diastolic pressure 18 mm Hg. This is a more significant rise than the increases in A-C choices, and client should receive more frequent evaluations and care.

(A) Tetany is seen with low calcium. (B) Low potassium causes dysrhythmias because potassium is responsible for cardiac muscle activity. (C) Numbness of extremities is seen with high potassium. (D) Headache is not associated with potassium excess or deficiency.