Direct action hormones, act directly on non-endocrine tissues. Indirect action hormones - modulate the secretory activity of other glands (trophic - such as TSH, ACTH, FSH and LH).
Direct action hormones, act directly on non-endocrine tissues. Indirect action hormones - modulate the secretory activity of other glands (trophic - such as TSH, ACTH, FSH and LH).