1
NURS 612 EXAM 1 MARYVILLE UNIVERSITY ADVANCED HEALTH
ASSESSMENT EXAM 1 NEWEST 2025 ACTUAL EXAM 170 QUESTIONS
AND CORRECT DETAILED ANSWERS WITH RATIONALES (VERIFIED
ANSWERS) |ALREADY GRADED A+
Endocrine System 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
,2
Hormones 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 Hormones are released in one
location but can have the biologic effect either in that
location of release or somewhere else
,3
Endocrine
Paracrine
Autocrine
Intracrine
Endocrine Hormones are released in the circulation to
act on a target organ (between remote cells)
Paracrine 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 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
, 4
Intracrine Hormone action is within the cell that
produced the hormone
Mechanisms of Hormone Action 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.
The vesicle mediated pathway Protein and polypeptide
hormones are synthesized and stored in vesicles in the
cytoplasm of the endocrine cell until secretion is
required. Stimulation of the endocrine cell causes the
vesicles to move to the cell membrane and release their
hormones.
Non-vesicle mediated pathway Hormones are synthesized
in the smooth endoplasmic reticulum and released upon
synthesis. Ex.: Steroid hormones
Actions of Hormones Released
into the Bloodstream Circulate as free, unbound
molecules
NURS 612 EXAM 1 MARYVILLE UNIVERSITY ADVANCED HEALTH
ASSESSMENT EXAM 1 NEWEST 2025 ACTUAL EXAM 170 QUESTIONS
AND CORRECT DETAILED ANSWERS WITH RATIONALES (VERIFIED
ANSWERS) |ALREADY GRADED A+
Endocrine System 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
,2
Hormones 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 Hormones are released in one
location but can have the biologic effect either in that
location of release or somewhere else
,3
Endocrine
Paracrine
Autocrine
Intracrine
Endocrine Hormones are released in the circulation to
act on a target organ (between remote cells)
Paracrine 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 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
, 4
Intracrine Hormone action is within the cell that
produced the hormone
Mechanisms of Hormone Action 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.
The vesicle mediated pathway Protein and polypeptide
hormones are synthesized and stored in vesicles in the
cytoplasm of the endocrine cell until secretion is
required. Stimulation of the endocrine cell causes the
vesicles to move to the cell membrane and release their
hormones.
Non-vesicle mediated pathway Hormones are synthesized
in the smooth endoplasmic reticulum and released upon
synthesis. Ex.: Steroid hormones
Actions of Hormones Released
into the Bloodstream Circulate as free, unbound
molecules
