Incompatibility of one person's blood with another results from the action of plasma antibodies against the RBCs' antigens

A. Produces plasma hormones: blood does not produce hormones; endocrine organs secrete hormones into the blood. This statement is not a function of blood.
B. Transports a variety of nutrients: this is a function of blood (plasma carries nutrients to tissues).
C. Helps to stabilize the pH of extracellular fluids: this is a function; blood buffers (bicarbonate, proteins) help stabilize pH.
D. Helps to regulate body temperature: this is a function; blood redistributes heat and helps maintain temperature.
E. Participates in the initiation of blood clotting: this is a function; platelets and plasma clotting factors in blood participate in clot formation.

A. Cortisol: Cortisol (a glucocorticoid from the adrenal cortex) dominates the resistance stage of the general adaptation syndrome by sustaining energy supplies (gluconeogenesis), mobilizing fats/proteins, and modulating immune/inflammatory responses during prolonged stress.
B. Aldosterone: Aldosterone (a mineralocorticoid) contributes to long-term fluid and electrolyte adjustments by promoting Na⁺ and water retention, but the principal hormone of the resistance stage is cortisol.
C. Epinephrine: Epinephrine (from the adrenal medulla) mediates the alarm or immediate fight-or-flight response (rapid, short-term effects), not the sustained resistance stage.
D. Angiotensin: Angiotensin II is part of the RAAS and raises blood pressure/stimulates aldosterone, but it is not the dominant hormone of the resistance stage.
E. Norepinephrine: Norepinephrine is a sympathetic neurotransmitter/mediator of the immediate alarm response; it is not the main hormone in the prolonged resistance phase.