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NUR 612 EXAM 1 Module 3 UAB Latest Study Solutions 2024 Updates
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NUR 612 EXAM 1 Module 3 UAB Latest Study Solutions 2024 Updates
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NUR 612 EXAM 1 Module 3 UAB Latest StudySolutions 2024 Updates
Endocrine System ANS System composed of various glands that can synthesize and release
special chemical messengers called hormones.
System works closely with the Nervous System and the Immune system to regulate and integrate
body functions.
Functions:
Growth and development
Sexual differentiation
Metabolism
Adaptation to an ever-changing environment
Regulation of digestion
Use and storage of nutrients
Electrolyte and water metabolism
Reproductive functions
Hormones ANS Endocrine system uses chemical substances called hormones as a means of
regulating and integrating body functions.
Hormones are thought of as chemical messengers produced to target a specific cell. They do NOT
initiate reactions but function as a modulator of cellular and systemic responses.
Function as chemical messengers
Move through the blood to distant target sites of action
Or, act more locally as paracrine or autocrine messengers that incite more local effects
Most are present in body fluids at all times in greater or lesser amounts as needed.
Characteristics
A single hormone can exert various effects in different tissues.
, A single function can be regulated by several hormones.
Types of Hormone Actions ANS Hormones are released in one location but can have the biologic
effect either in that location of release or somewhere else
Endocrine
Paracrine
Autocrine
Intracrine
Endocrine ANS Hormones are released in the circulation to act on a target organ (between
remote cells)
Paracrine ANS Hormones acts locally in cells other than that produced the hormones Ex: sex
steroids in ovary (between local cells)
Hormones acting locally on cells other than those that produced the hormone
For example, the action of sex steroids on the ovary
Autocrine ANS Hormones exert action on the cells from which they are produced ex: insulin (on
the cell that produced them)
Hormones exerting action on the cells from which they were produced
For example, the release of insulin from pancreatic beta cells can inhibit its release from the same
cells
Intracrine ANS Hormone action is within the cell that produced the hormone
Mechanisms of Hormone Action ANS Hormones interact with high-affinity receptors.
These are linked to one or more effector system in the cell.
Hormone receptors may be located in the plasma membrane of the cell (surface of the cell) or in the
intracellular compartment (inside the cell) of the target cell.
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