A patient with blood type O needs a transfusion. Which blood type is compatible for this patient?
B
AB
A
The Correct Answer is B
A. B: Blood type B contains B antigens and anti-A antibodies; transfusing B into an O recipient (who has anti-A and anti-B) would cause a hemolytic reaction.
B. 0: Type O blood (often written "O") lacks A and B antigens and is compatible with a type O recipient; type O recipients, however, generally can only receive type O blood.
C. AB: Type AB blood has both A and B antigens and would be incompatible with a type O recipient who has antibodies against both.
D. A: Type A blood contains A antigens and anti-B antibodies; transfusing A into an O recipient would trigger a reaction due to anti-A/B antibodies in the recipient.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
A. Aldosterone:Aldosterone primarily regulates sodium and potassium balance and blood pressure, not the classic metabolic stress response.
B. Insulin:Insulin regulates blood glucose uptake and metabolism; it is not the primary hormone mediating the stress response.
C. Cortisol:Cortisol, produced via the HPA axis, mobilizes energy, modulates immune responses, and is the principal glucocorticoid involved in the stress response.
D. Thyroxine:Thyroxine (T4) controls basal metabolic rate and growth but is not the primary hormone of the acute stress response.
Correct Answer is D
Explanation
A. Through conscious voluntary control:Pituitary secretions are regulated by neuroendocrine pathways and feedback loops, not by conscious voluntary control.
B. By the autonomic nervous system directly stimulating the pituitary gland:The autonomic nervous system can modulate some endocrine organs, but pituitary control is primarily via hypothalamic neural and vascular signals rather than direct autonomic stimulation of the pituitary itself.
C. By feedback from peripheral organs only:Peripheral hormone feedback influences both hypothalamus and pituitary, but this is not the sole mechanism—neural input from the hypothalamus is essential.
D. Through direct neural connections with the hypothalamus:The hypothalamus, a neural structure, communicates with the pituitary via neural (posterior pituitary axons) and vascular (hypophyseal portal) connections to regulate pituitary hormone release.
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