What is the Origin of Hormone Transport System?

A descriptive term from endocrinology and human physiology, combining the core regulatory molecules, "Hormone," with the physiological means of distribution, "Transport System." It underscores the systemic nature of endocrine communication and the role of the vasculature.

What is the Mechanism of Hormone Transport System?

Steroid hormones, being lipid-soluble, are primarily transported bound to specific globulins like Sex Hormone-Binding Globulin (SHBG) or albumin; this binding protects them from rapid metabolism and determines the concentration of "free" or biologically active hormone. Peptide hormones typically travel unbound in the plasma. The concentration and affinity of these carrier proteins are critical regulatory points, directly influencing the effective hormonal signal received by target cells.

Hormone Transport System ∞ Area

Hormone Transport System

Meaning

The complex network within the circulatory system responsible for the movement of endocrine signaling molecules, including steroids, peptides, and amines, from their glands of origin to their distant target tissues. This system relies heavily on specific carrier proteins to regulate hormone bioavailability, half-life, and ultimate clearance from the body. Its integrity is vital for effective systemic communication.