Which of These Statements Describes Glucagon

Multiple Choice

Which of these statements describes glucagon

A) It is secreted by the beta cells of the islets of Langerhans.
B) It is secreted in response to a fall in blood glucose.
C) It is, in general, antagonistic to all other hormones in terms of metabolic effects.
D) It increases fat stores by inhibiting the enzyme that catalyzes triglyceride breakdown.