How control of insulin and glucagon is regulated by push and pull mechanism?

(a) It is regulated by a ‘limit-control feedback’ or ‘push and pull feedback’ mechanism.
(b) When sugar level in blood increases, insulin is secreted and glucagon secretion is inhibited.
© When blood-sugar level falls, for instance during excessive physical labour or stress, secretion of glucogen is stimulated and insulin secretion is inhibited.
(d) This is the self-regulating device