Humoral regulation (control) The chemical compounds that come from outside or formed during metabolism (metabolites) can affect the cells of the body

Humoral and hormonal (endocrine) regulation [control]

Humoral regulation (control)

The chemical compounds that come from outside or formed during metabolism (metabolites) can affect the cells of the body, changing in a certain way its processes. Most often, this effect is carried out by the nervous system. Chemical receptors, which are located in the bloodstream and directly in organs, perceive changes in the indicators of chemical homeostasis and trigger reflex responses towards its renewal.

Regulation of functions caused by the action of chemicals called a humoral. Such a regulatory mechanism is present in animals of various levels organization, ranging from single-celled. Taken from http://worldofschool.org

Diagram 157. Hormones producers: 1 — pituitary gland: 2 — the pineal gland (epiphysis); 3 — the hypothalamus; 4 — the thyroid and parathyroid glands; 5 — the heart; 6 — the adrenal glands; 7 — kidney; 8 — pancreas; 9 — stomach and intestines; 10 — ovary

Hormonal or endocrine regulation (control)

Improvement of humoral regulation mechanisms in the process of evolution has resulted in hormonal regulation — control by means of special active ingredients-regulators — hormones (from Greek “excite”). These substances are formed by glands or special group of secretory cells that has no specialized excretory ducts and emit their secrets directly into the bloodstream. Therefore they are called internal glands or endocrine glands (from Greek “internal” and “to secrete”).

Regulation of body functions via hormones is called a hormonal or endocrine. Endocrine glands include the pituitary, pineal, thyroid, parathyroid, pancreas, adrenal glands, gonads and thymus (diagram 157).

Categories: