16
The Endocrine System
The Endocrine System: An Overview
(pp. 592–593)
Hormones
(pp. 593–598)
The Chemistry of Hormones (p. 593)
Mechanisms of Hormone Action
(pp. 593–595)
Target Cell Specificity (pp. 595–596)
Control of Hormone Release (pp. 596–597)
Half-Life, Onset, and Duration of Hormone
Activity (p. 598)
Interaction of Hormones at Target Cells
(p. 598)
The Pituitary Gland and
Hypothalamus
(pp. 598–606)
Pituitary-Hypothalamic Relationships
(p. 599)
The Posterior Pituitary and Hypothalamic
Hormones (pp. 599–601)
Anterior Pituitary Hormones (pp. 601–606)
The Thyroid Gland
(pp. 606–610)
Location and Structure (pp. 606–607)
Thyroid Hormone (TH) (pp. 607–610)
Calcitonin (p. 610)
The Parathyroid Glands
(pp. 610–611)
The Adrenal (Suprarenal) Glands
(pp. 611–616)
The Adrenal Cortex (pp. 612–615)
The Adrenal Medulla (pp. 615–616)
The Pineal Gland
(pp. 617–618)
Other Endocrine Glands and Tissues
(pp. 618–623)
The Pancreas (pp. 618–620)
The Gonads and Placenta (pp. 620–621)
Hormone Secretion by Other Organs
(pp. 621–623)
Developmental Aspects of the Endocrine
System
(pp. 623–624)
591
Y
ou don’t have to watch
CSI
to experience action-packed drama.
Molecules and cells inside your body have dynamic adventures on microscopic
levels all the time.
For instance, when insulin molecules, carried passively along in the blood, attach to
protein receptors of nearby cells, the response is dramatic: Glucose molecules disappear
from the blood into the cells, and cellular activity accelerates. Such is the power of the
second great control system of the body, the
endocrine system
, which interacts with the
nervous system to coordinate and integrate the activity of body cells.
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